Hammer crusher failure and troubleshooting

Bearing overheating. Reason: lack of grease; excess grease; grease filthy degenerate; bearing damage. Remedy: Fill the amount of grease; bearing greases should be 50% of its

volume of space; cleaning bearings; replace screening equipment grease; replace the bearings. The particle size is too large. Reason

: Hammer wear too large; sieve fracture. Remedy: Replace the hammer; replace sieve. Elastic coupling produces percussion. Cause: The pin loosening; elastic ring wear; Remedy:

stop pin and tighten the nut; replace elastic ring. Reduced yields. Reason: sieve gap is

Blockage; feeding uneven. Remedy: parking, cleaning sieve gap obstruction; adjust feeding mechanism. Percussion sound generated inside the machine. Reason: non-broken material

into the inside of the machine; liner loose Circular vibrating screen fasteners, hammer hit the liner; hammer or other parts breakage. Exclude

Methods: parking, clean up the crushing chamber; checking liner fastening and hammer and the gap between the sieve; replace broken parts. Sudden vibration. Reason: replace the

hammer or due to wear of the rotor cone static balance undesirable; hammer broken rotor imbalance; pin bending and breaking;

Triangular plate or disc cracks; bolt umbrella Remedy: Remove the hammer, hammer selection by weight, so that each hammer shaft relative to its total weight of the hammer hammer

hammer axis equal to the total weight, ie static equilibrium reached requirements; replace the hammer; replacement pin; welding repair or replacement; fastening

Anchor bolts.

What is the process of crushing ratio and crushing machine

A) crushing ratio measure crusher crushing effect, commonly broken than this concept. Crusher broken ratio is the raw material particle size and accuracy of the product after

crushing ratio. It indicates the extent of crushed material decreases. Crushing ratio are the following calculation methods. 1) material with a broken front

Maximum size and the maximum size of the crushed product ratio calculation i = Dmax / dmax where Dmax - maximum size of material before crushing; dmax - maximum particle size

after crushing materials. As national habits, the maximum size value in different ways. Anglo-American to pass 80% of the material

Sieve mesh width of the maximum particle size diameter of our country and the former Soviet Union with 95% of the material through the sieve of mesh width of maximum particle

size diameter. 2) crusher feed opening width and effective discharge opening width ratio of i = 0.85B / b where B --- crusher feed opening width; b ---

Crusher <discharge opening width; 0.85-assurance crusher bite the effective width of the material feeding system. The value of the width of the discharge opening, take the

largest coarse crusher discharge opening width; take the smallest in the crusher discharge opening width. The crushing ratio calculated with very convenient, is not always

possible due to the production

For a large number of materials for sieve analysis, but the use of this formula, just know that the crusher feed opening and the discharge opening width reduction ratio can be

calculated. It is worth noting that some double roller crusher, not by the size of their nesting nesting population size to decide. 2) with an average particle size calculated i = Dcp / dcp

type

Dcp-crushed material in front of an average diameter; dcp-average diameter of crushed material. This method is obtained crushing ratio, can more truly reflect the degree of

fragmentation, and thus it is often used in theoretical research. (2) crushing process ore into bars screen a first pre-screening, which

Sample fine grade ore can be separated, thus reducing crusher load. Sieve material into the gyratory crusher two years, after crushing, the resulting product with the 1st

undersize material fell on shaker 3, after sieving, sieve the material into the cone crusher (referred to as the crusher) ,

Sieve shaker material fell 5. Discharged from crusher 4 products also fell shaker 5. After sieving, the sieve material re-entering the crushing cone crusher (short Crusher)

inside. Thus, the vibrating screen 5 is to check both screening and pre-screening, sieving the role check is broken

Nesting sieving machine, roughly equal to the size of its pre-screening sieve sieve size. Sieve material into the crushing machine failed six of its products to return to the

vibrating screen 5, and fall into the hopper under the screen qualified seven years, and then into the ball mill 8. Shaker 5 Rejected materials on re-entering the crushing

Machine 6. This process, the crushing machine for the closed-circuit crushing cycle? Tibia Xing Jiao  Philippine hazel  fertilizer spinulosa P  Chek flutter flutter

flutter hazel   Huan Wen Wen Huai flutter Starling Starling ㄒ  V Hing hazel ? Sec broken (secondary broken), three-stage crushing machine is broken (tertiary crushing).

The entire process can also be called crushing

Segment, broken segments, crushing section and the mold broken segments.

Corundum Crusher

Corundum crusher main purpose is broken corundum, white corundum, corundum, dense corundum and so on.
Corundum is the use of the crusher dewatering screen roller surface friction material will be broken into bite so bear squeeze or split and broken machinery. When used for coarse crushing

or need to increase the crushing ratio, often in the roll surface of the teeth or grooves to increase the splitting effect.
Corundum crusher reliable operation, easy maintenance, low operating cost, output size adjustable.

Corundum crusher usually divided by the number of the roller on the roll crusher and corundum corundum crushing equipment, suitable for rough broken, broken, or, corundum, fine coal,

limestone, cement clinker and feldspar following hard materials.

Describes three types of aggregate crushers

Learn aggregate crusher, first we have to understand what is under the aggregate. Aggregates, which in the concrete from the skeleton, or a loose particulate material filling

action. Of coarse aggregate and fine aggregate. Coarse aggregate including gravel, crushed stone, slag, etc., fine aggregates including sand, fly ash, etc., it is in the

building

Class plays a very important role in the mixing, the cement by the water while stirring into a thin paste, if not aggregate, it will not be forming, will lead to unusable. So

aggregate is very important in building The raw materials.

According to the use of aggregate types, that is, coarse aggregate and fine aggregate, where the focus on three types of aggregate coal mining machine.


The aggregate crusher jaw crusher, jaw crusher with crushing ratio, even granularity, simple structure, reliable operation, easy maintenance, operating costs and economic

characteristics, mainly used in metallurgy, mining, chemical, cement, construction , refractories and ceramics and other industrial sectors as in

Pieces and crushing of hard ores and rocks with. Structure of the main frame, eccentric shaft, big pulley, flywheel, moving jaw, side guard, elbow board, elbow board seat,

adjusting screw, returning spring, fixed jaw plate and movable jaw plate and other components.


The aggregate crusher roll crusher, roll crusher is the use of the roll surface friction material will be broken into bite so bear squeeze or split and broken machinery. When

used for coarse crushing or need to increase the crushing ratio, often in the roll surface of the teeth or grooves to increase the splitting effect. Work

Reliable, easy maintenance, low operating cost, output size adjustable. Roll crusher usually divided by the number of the roller on the roll crusher (double roll crusher) and

four roll crusher, suitable for crushing, breaking or crushing of coal, limestone, cement clinker and feldspar following hard of

Aggregate.


The aggregate crusher cone crusher, cone crusher crushing operations according to needs, divided into standard, intermediate and short head type three forms, mainly for

compressive strength less than 300Mpa various aggregates and crushed rocks or crushing, of which standard is mainly used for medium crushing, intermediate host

To be used for medium crushing and fine stone screening machine and the short head type is mainly used for crushing, the cone crusher in China is currently on the hard ore crushing and fine

crushing in a typical device, is widely used, it has a large crushing ratio, high output , less power consumption, uniform particle size, particle crushing hard objects to adapt

And other characteristics.

How do aggregates production line equipment prepared before operation

 Aggregate production line high degree of automation, low running costs, crushing equipment rate, energy saving, large output, less pollution, easy maintenance, to produce sand meet the

national standard construction sand, particle size were, uniform grain shape is good, with reasonable level. However, in a good machine in the boot before running a very

important job is running before the inspection. How do today introduced aggregate production line equipment operation preparatory work before.

First, you should check aggregates production line equipment lubricant tube is connected securely, pre-commissioning should be re-added once the oil, add Mobilube lubrication

premium or 3 # lithium grease; checking aggregates production line equipment, motor wiring is correct, voltage is normal ( normal voltage 380 V); Check the component connection,

should be solid and reliable, carefully check the impeller for foreign objects, if any should be excluded. Furthermore belt is installed before you start the motor rotation

direction signs should be consistent with the Screening machine (ie from the feed port to see the impeller rotates counterclockwise) if the signs in the opposite direction, the motor

wiring should be adjusted so that rotation and signs in the same direction, and never allow rotating in opposite directions; For dual motor drive, spindle assembly with both

sides of the motor, respectively, with the same number of triangle belt and spindle assembly is connected to both sides of the triangle belt tensioning and should be adjusted to

the same straight . Final. After checking, the transfer of stone production line equipment before the first stone production line equipment empty load and load test, the test

confirmed that no problem and then handed over production.

Large crushing ratio hammer crusher

General hammer crusher crushing ratio of 10 to 15, high up to 30 or more, large crushing ratio hammer crusher crusher addition to the general characteristics, for bulk

materials, you can not go through crushing, directly into the crusher obtain small particle size and uniform product,vibrating screen design ratio of up to 100 or more, is a time to make up

the bulk material crushing models, thus simplifying the material crushing process links, saving manpower and resources, reducing the cost of the product consumption.


Ingestion of bulk materials can achieve a complete break into coarse crushing purpose of grinding to create the conditions to increase the yield. The device structure is divided

into coarse crushing cavity chamber and broken, smaller particle size material into the machine directly into the mouth after the crushing chamber, coarse bulk materials are

first broken in the cavity by the high-speed rotation of the hammer blow broken into small pieces , then enter the crushing chamber is crushed into a fine powder or hammer,

sieve through the discharge gap discharge. This will mining screen complete the same institutions that will break the material from coarse to fine the entire process. The device is

discharging sieve full discharge, simple operation.

The origin and development of the crusher

    Currently the world's popular and dominant crusher, mostly in the United States on the basis of Newell derived, possession of nearly Qi Cheng. The emergence and development

of the crusher, and the scrap industry is closely related to the beginning just to deal with some thin material, as recognized

Deepening of knowledge, as well as show the oscillating screen superiority of broken steel, all kinds of crushers has been continually developing, using increasingly wide range, and even the

entire vehicle scrapped cars and household appliances for processing, together with the appropriate transport machines and sorting equipment, components can be easily broken

scrap

Production line, you can right without dismantling scrapped cars and household appliances for automated production and processing process, get pure Mobile crushing plant steel and non-ferrous

metals and non-metallic materials available.

Selection of broken machinery

Users in the purchase of broken machinery, it is often confused for a large number of broken machinery do not know how to choose, this article on the classification of broken

machinery and common type coal screening machine introduction: the selection of one of the broken machinery

First, the classification of broken machinery and Scope
(A), the material crushing methods
Although many types of broken machinery, but in different ways by force, the materials are crushed crush, bend, impact, cutting and grinding methods. In the crushing machine,

the force situation is very complicated, often of several force exist, of course, is also a crusher station one or two main

Force.

As the material is irregular particle shape, and the different physical properties of materials, so the use of different methods of crushing, crushing the material by the use of

mechanical external force is applied there are several different ways.
1 crushed the material is placed between two face, applying pressure, the material reaches its compressive strength due to stress and broken, this method is generally suitable

for crushing bulk materials.
2 chipping the material as a flat and a job with a sharp edge between the plane, with a sharp edge when working on the material plane extrusion, the material along the direction

of the line splitting pressure. Splitting is due to the cleavage plane of the tensile stress reaches or exceeds the tensile strength limit of the material.

Ultimate tensile strength of the material smaller than the ultimate strength.
3 fold Linear vibrating screen material and broken by bending stress. Material to be broken to withstand concentrated loads of two or more pivot fulcrum Charpy beam bending stress when the

material reaches the bending strength of the material, he incurs a broken broken.

4 material impact crusher and broken by the impact force, the crushing force of its instantaneous effect, and its high crushing efficiency, crushing ratio, energy consumption,

impact crusher has the following situations:
(A) the work of the body movement of the material impact;
(2) high-speed movement of the material impact to the fixed face;
(3) tell the movement of materials collide;
(4) the work of the body to high-speed movement of material floating shock.

5 grinding (grinding) materials and movement between the surface of the work by a certain degree of pressure and shear stress, its shear stress reaches the ultimate shear

strength of the material, the material will be crushed; or friction between materials cut, leaving the role of grinding material crushed.


(Two) the classification of broken machinery
1 type crusher
Press the structure and working principle of different commonly used crushing machinery are subject to the following types.
(1) jaw crusher (broken jaw) is to rely on the role of cyclical movable jaw plate reciprocating motion, put into two jaw crushed material between the plates.
(2) hammer crusher (hammer broken) materials by high-speed rotation of the hammer impact and at high speed to the material itself, the impact of the fixed liner material

crushing.
(3) cone crusher (cone crusher) by eccentric rotation of the inner cone, so that the material in between two cones is bent and crushed and broken.
(4) Impact Crusher (Crusher) material by the high velocity hammer blow, so that the material to the back plate high-speed impact, and the clash between materials and grinding.
(5) roll crusher (roller-breaking) the material falls on two parallel and opposite rotation between rollers (opposite rotation), the material in the friction roller surface

under the effect of being pulled between the rollers, the rollers being The crushed and broken.
 Another point worth noting is that the crushing ratio and unit power consumption (energy per unit mass of crushed product consumption) is the basic crusher technical and

economic indicators. Unit power consumption in order to identify whether the broken machinery of power consumption economy, crushing ratio used to describe the characteristics

of the grinding process and

Identification grinding quality, the two crusher unit power consumption even if the same, but the crushing ratio is different, the two crushing machine is not the same economic

effect. In general, the crushing ratio of mechanical work efficiency. Therefore, to identify broken machinery's efficiency, should also be considered

Its unit power consumption and crushing ratio size.

Mining machinery industry investment driven by some prospects

Fixed asset investment growth by pulling boom mining machinery industry is still high. Among them, for railway and rail transit construction rubble, coal crusher growth prospects.

Since 2009 because the state's 4 trillion investment plan introduced in succession into the construction peak, you can expect the next two years, investment in fixed assets will

increase significantly, mining machinery industry will continue to grow rapidly based. Typically, infrastructure construction and real estate development investment of 5% to 8%

Buy construction machinery and equipment (of which there are crusher machine), and according to estimates, four trillion investment could boost annual consumption of 300 to 500 mining

machinery million, mining machinery around 15% annual growth.

Which is the construction of the railway and urban metro focus: Investment 1.25 trillion yuan for the construction of 17,000 km of new railway; while upgrading the existing rail

network technology, expansion of the existing road network to the remote west. Investment of about 200 billion yuan for urban metro network construction. The average annual

investment

1400-1600 billion yuan for the construction of 380,000 km of roads, including 24,000 km of expressways. Mining machinery industry is a typical cyclical industry, and its cycle

of about 10 years, and the current round of economic cycle from mining machinery since the beginning of 2001 has been nearly nine years of

Between the adjustment has not been, and we expect the industry is gradually increasing pressure on cyclical adjustment.

Coal crusher

Crushing operation is the rapid development of modern industrial mineral processing field a very important part. Coal crusher most widely used in the industry, all of the coal

mines, coal preparation plant must undergo crushing operations to enter the next process. With coal mining mechanization and automation processes

The degree of improvement and new coal vibrating screen preparation process for the emergence of the crusher crushing process technology and also a higher increase.

With the development of human production and life, you need more and more types of material crushing process complicated, increasing the amount of raw coal crusher is a new and

efficient crusher, with its production and use of the extent of the effect was recognized, and its coal, cement, construction aggregates industry, and metal

Mining, nonmetal mines applications will be expanding. With the further development of technology, coal mining machine bound in the new field of a new breakthrough, especially

for hard materials broken, make prospects more open.

Circular Vibrating Screen Installation Precautions

Circular Vibrating Screen Before installing, first by mechanical packing slips, checks are complete and damaged parts, including vibrators Date from the factory, if more than

six months, must be re-washable and assembly, and replace it with clean oil .
    Installed by the time, in strict accordance with the setup diagram supplied mechanical equipment installation, including supporting the chassis must be mounted horizontally,

based on the foundation should have sufficient stiffness and strength to support the entire shaker dynamic load and static load.
    Screen box corners have a lug, bearing chassis corners have lifting holes, as required for lifting, not directly linked to the vibrator on lifting the entire sieve, sieve

box and ensure hopper, chute (chute) such a class Feeding equipment of non-sports parts should be maintained between the minimum clearance of 75mm.
    Strict requirements to install, make sure the spring seat and screen box friction damper plate on a 10mm gap between. Damping spring free height by matching, respectively,

so that the left and right sides of the front end or back-end spring free height equal as far as possible, the error does not exceed 5mm. Screen box after installation, around

the screen surface protection

Support level, or, in the spring seat Screening machine member and the support pad Q thin sheet iron.

Cement clinker crusher

Cement clinker crusher is mainly used for medium crushing cement clinker or cement raw materials (limestone), is a cement production line technological transformation or create

an ideal choice for secondary crushing equipment.
Cement clinker crusher has the following characteristics:
(A) crushing ratio, maximum feed size 100-180mm, the particle size less than 3mm more than 90% (of which 30% -60% of powder);
(2) high energy efficiency, power consumption per unit of production 1. 29kw. h / t;
(3) and supporting the use of a ball mill, mill output can increase 30% -40%, the system power consumption decreased by 20% -30%;
(4) Selection of high wear-resistant alloy consumable material, abrasion, long life;
(5) smooth operation, good sealing, dust, low noise;
(6) simple structure, easy operation, small footprint, easy installation and maintenance.
This series also cement clinker crusher is suitable for coal crusher machine iron ore, aluminum ore, sandstone, gypsum, blast furnace slag, coal dry stone, phosphate rock and a hard lump

ore, etc.. Can be used in building materials, mining, metallurgy, coal, chemical and other industries.

Processed materials and techniques default resolution crushing plant

Fan in the fan air volume selection issue, I have contacted many of the technical staff in both there is a misunderstanding (including the institute's technical staff): Always

mention by air delivery system as the standard material amount of wind mill design requirements regardless of the negative pressure, even thought the selected wind

Pressure pulverizer machine can guarantee the requirements of another job pressure. In fact grinder required pressure is the pressure difference inside and outside the mill

sieve, air volume can not be guaranteed, then the pressure inside and outside on the small sieve, coal crushing plant powder can not be immediately qualified discharge, and was repeated

hammer mill combat and processing

Large circulation layer, resulting in increased power consumption grinder, impact crushing yield, so the fan flow must ensure pressure and wind mill sieve references to material

delivery system requires air flow into account, choose whichever is greater. Pressure measured at system pressure loss decision. Opportunities with centrifugal wind

The system increases wind resistance loss decline, such as increased yield when crushed, fan air flow is reduced, the fan should be considered when selecting a fan operating

point when the actual use of the parameters and the impact of the impeller wear.

Vacuum box grinder grinding process using natural atmospheric pulverized powder sieved qualified poor ability t crushing and screening plant material and high power consumption, and on-site dust

capacity, environment is poor, there are security risks. It previously widely used at home and abroad for the grinding process with vacuum box below 1,2 milling station

Arts. The main purpose of the grinding process is to pass the powder after grinding as soon as possible from the sieve through the negative pressure inside the suction

ventilation, thereby improving the output of pulverizer and reduce power consumption. 1 shows the process as autistic Screw conveyor is powdered materials, autistic autistic

plate conveyor often

Failure, resulting in air leakage within the screw conveyor, causing the negative pressure in the negative pressure tank lower sieve mill external pressure can not be

guaranteed, a direct impact mill production, so that the grinding process is theoretically feasible, poor stability of the actual operation. 2 shows a grinding process and the

Well eliminate air leakage.

Vacuum tank grinding process accounting and Design Considerations ① mill sieve external pressure must ensure that 800 ~ 1500Pa, pressure is too small, the mill production is

reduced; mill inlet air intake must be arranged in order to ensure adequate air flow into the system. ② vacuum tank

Gas velocity ≤ 2.5m / s, generally choose ≤ 1m / s, the gas velocity is too large, the powder will be sucked away fans, but also to increase the pulse bag filter processing

burden. ③ Selection cyclone discharger must ensure that the fan can handle (the maximum amount of wind turbine by 95% to 98% chose) the actual amount of wind

. Pulse bag filter in use for some time, it will reduce a lot of air volume, resulting in loss of pulse bag filter resistance increase, thus affecting the actual amount of wind

turbine, it reduces the pressure inside and outside the mill sieve, so often crushing system used for some time

Room, its crushing production will decline, so the selection process when the pulse bag filter should be selected air volume fan flow of 1.8 to 2 times.

Fan Selection is the most critical, the general fan air flow by mill sieve area per square centimeter of not less than 0.3m3 / h, normal selection by 0.45 ~ 0.6m3 / h, normal

crushing system centrifugal fan air flow will actually With the loss resistance of the system decreases. Wind turbines

Selection must be based on the calculated pressure system pressure loss (including loss of pressure difference inside and outside the mill sieve) of 1.1 to 1.2 times for the

proper selection. Most of the fan is selected to reduce the power consumption low, system piping speed ≤ 15m / s.

Grinding process with the advantages and disadvantages of the negative pressure box advantages: product powder of the water taken to reduce the body temperature of the powder

product with the grinder 5 ~ 10 ℃; increased sieving ability of the material mill, the mill capacity, compared with a natural crushing pressure increase production 15% to 30%;,

and negative lead

Wind crushed powder can reduce dust and improve the operating environment.

Summary The above is based on maize and cassava as raw material for ethanol production grinding process design and equipment selection process frequently encountered major

problems and countermeasures, not necessarily all right, but I hope it can engage in these aspects of the design, production management, equipment Management has helped people

Help and learn from.

Mainland new large stone crushing stone English sandstone resolve the situation

Problems and influencing factors in July 2008 started running, after system commissioning, in addition to other varieties of large stone outside the coarse aggregate quality

requirements are met. Large number of stone to meet the premise of flakiness content and maximum edge length does not meet the requirements; satisfy the premise of quality

Can not meet the production requirements, while controlling the content even flakiness specifications will still be within the scope of the phenomenon of long strips. Analysis

of the reasons, the main factors affecting the performance in the following aspects.

(A) the source material properties. After metamorphic quartz sandstone, the crystal orientation, anisotropy is generated during processing and flakiness elongated main reason.

(2) equipment limitations. Finished material transport with a diameter of 500mm continuous belt conveyor tube bend, allowing the transport of materials maximum particle size of

150mm, combined with expert advice, large stone limit the maximum edge length does not exceed 250mm. Also, according to "Hydraulic Concrete Aggregates testing procedures"

Requirements, does not allow a large stone produces flakiness.

(3) Concrete gradation adjustment. 2009 design units and field trials to determine the center of the concrete dam concrete test report with a ratio of four large stone: stone:

the stone: stone = 35:25:20:20. Large proportion of original stone set 30:30:20: 20 percentage basis

There is a certain amount of increase.

Process Improvement test for the problems, the project implementation process for a number of improvements trials, including crushing nesting population adjustment, mesh

screening machine and structural adjustment, broken cone machine nesting population adjustment, intermediate impact crushing equipment and primary impact crusher, etc. Improved test, trial

The main purpose is to solve test large stone in the number of simultaneously satisfy the feed Jinping Hydropower Station to meet the quality requirements.

Primary Impact Crusher combo test. Impact crusher crushing the use of two test speed is 90% greater than 80mm diameter, respectively, of semi-finished material in the crusher

speed 32.5m / s and 42m / s when the test results. It can be seen from, the line speed change, particularly

Boulder yield is not obvious, 44m / s transfer speed is better, the actual content of semi-finished products in the proportion of more than 80mm should be around 50%, large

stone actually get about 20%.

Primary Impact Crusher complete crushing plant wool also carried out tests, test results and crushing cycle comparison, the test results is the use of primary counterattack crusher wool less

effective, large stone to get rate has dropped by about 5%, the maximum edge length up to 500mm .

Finished material quality testing system table entries particle content of a percentage /% 80 ~ 15040 ~ 8020 ~ 405 ~ 20 <5 Gradation 22.420.022.919.415.3 flakiness

9.211.712.68.5-state current King Stone needle chip content controlled at 10%, but with side length 250mm

The proportion reached 40%, the maximum edge length is still exceeded 350mm, the production ratio can reach 25% or more, basically meet the dam material. Due to multiple shaping

the stone proportions and significantly higher proportion of disposable materials. Through concrete test, large stone strips on concrete performance has little effect, but the

tube

Difficult to transport with a machine. To ensure the smooth construction of the concrete dam, dam concrete system settings in the car by the material pit, large stone used car

transport. Adjust stirring downstairs spout, maintaining four with concrete production.

Conclusion Yin Bazi ditch aggregate processing system, since the operation, production and testing has been implemented to explore solutions to cross large stone quality and

yield of the ultimate goal. It should be said that the current combination of technology and equipment configuration tends to the ideal state, but there are still large stone

production targets

Elongated ones, the problem of insufficient production proved lithology processing performance is causing the biggest reason for this series of questions, indicating Jinping

metasandstone processing four with the production process so far has not been a corresponding countermeasures, aggregate processing system is still worthy of further overcome

Issues, it also brings to similar projects explore and think: ① equipment and equipment level there is currently expanding space, such as those for special elongated aggregate

crushing parameter design, both to avoid excessive fragmentation, can be measured reliably shaping to ensure quality ; ② expansion of existing space craft link exists

In the current session on the basis of the existing process, it may explore a special new technology; ③ focus on follow-up system device configurations, such as transportation

systems and concrete finished device configuration and system processing performance matching and lithology combination, can be ordinary tape machines and self-loading mixed

Concrete mixing plant; ④ dam mix design to fully consider the source material processing properties, such as the use of three with four alternative distribution and so on.

Mainland provinces sand material crushing plant components production techniques and quality curb

Tender process design in the tender documents net gravel, sand reserves calculation of net yard table B, pebbly rate accounted for 56.5%, sand rate accounted for 43.5%; B zone

grading pebbly rate> 150mm accounted for 1.2%, 150 ~ 80mm accounted for 8.0%, 80 ~ 40mm accounted for 24%, 40 ~ 20mm accounted for 44.7%

, 20 ~ 5mm to 22.1% by calculation process, the processing system is tender wool hourly capacity 400t designed to give pure natural and screening> 150mm production capacity of

2.712t / h, 150 ~ 80mm in is 18t / h, 80 ~ 40mm for 54.24t / h, 40 ~

20mm for 101.022t / h, 20 ~ 5mm for 50t / h. To achieve large rock, stone, the stone, stone, sand production capacity design requirements, design stage crushing process is 2

plus ball milling, ie crushed, sand, milling. Broken in the open circuit production, using a table

GP100SC crushing a sieve part after stone and large stone, then passed the sieve supplement pebble deficiencies (pebble replenishment rate of 19t / h), the remaining coarse

aggregate (including redundant 21t / h) total for the system sand; sand for the closed loop, to provide raw materials for the ball mill pulverizing;

Excess in the production process> 150mm of 2.712t / h through the pre-sieve of wool considered as disposable materials, excess of 150 ~ 80mm 15t / h considered for processing

crushed stone.

When the system design description Jian wool according to the actual level of natural gravel pairing the bidding process design has been optimized, the bidding pre-screening

(2YKR2052) and a double sieve sieve (2YKR1845) double sieve is used in one 3YKR2460 instead of three sieves can be achieved

Pre-screening and a sieve screening effect, and later because they do not consider the sand, flour, broken take is a Taiwan PEX300 × 1300 instead of the bidding GP100SC cone

crusher crushing stone and part of the large boulder supplement the lack of 19t / h pebble . Gravel screening capacity of natural systems in Table 1.

Nongling hydropower aggregate processing system project screening capacity of natural treatment capacity / (th-1) percentile /% wool processing capacity 354 - large stone

boulder above the coarse aggregate 5014 output of 7822 finished finished finished pebble stone production yield 359.3 288.7 Finished Natural sands production 163,465

Gravel processing system production situation analysis based on the materials used units of various size finished aggregate usage analysis, no large stone, stone: the stone:

stone actual use of materials ratio becomes 3:8:7; pure natural screening processing system wool processing capacity of 354t / h, large stone above thick bone

Material for the 50t / h, stone production was 78t / h, the stone production was 35t / h, stone production was 28t / h, sand 163t / h: Accordingly, natural screening, this

grading scale power plants can not meet the requirements of the finished building aggregates, stone and the stone must be added. The best way to

Is the use of broken programs, the large stone above the finished stone wool and excess process for crushing stones and pebbles in after supplement deficiencies, so that the

system is adjustable scale processing state.

In order for the system is adjustable scale processing status can be obtained by calculating the aggregate power plant construction needs, every day at 14h for processing


System process flow design (1) crusher manufacturer. Crushing coarse broken, broken two crushing process, rough broken, broken open the production of various size grading meet the

production requirements.

(2) a screening workshop. Wool mined by the hopper with a car transport to, and then through the 1st belt (the 1st belt Q = 500t / h) into a sieve workshop, a screening plant ; a sieve after King Stone belt through the 11th into the crushing plant for crushing, boulder belt through the

4th boulder into finished products warehouse through the 3rd belt conveyor into a boulder crushing plant, the stone the following mixed

By the 5th belt material into two sieve, sand belt through the 7th to the 6th position in the belt to the finished sand.

(3) crushing plant. Crushing plant design capacity of 60t / h, the workshop 2 sets PE400 × 600 jaw crusher, handling a screening plant after screening 80mm above the coarse

stone, broken after the stone through the 12th belt conveyor to the two No. crushing plant crushing, the shop alone

Crusher capacity (opening regulated at 40 ~ 60mm) can reach 30 ~ 50t / h.

(4) Oishi a crushing plant. Medium crushing plant design capacity of 50t / h, the workshop set up a Taiwan PEX300 × 1300 jaw crusher, dealing mainly with wool after sieving

through a sieve workshop excess 50t / h of stone aggregate, after breaking through PEX300 × 1300 mixed

Material through the 14th, the 15th, respectively, into the belt conveyor No. 1 and No. 2 in broken broken workshop workshop sand vibrating screen. Stone crushing plant, a single

sieve screening workshop in stone after the belt through the 8th machine to the finished stone warehouse, stone

By the 9th belt conveyor to the finished stone silos, sand through the 10th to the 6th belt conveyor belt conveyor to the finished sand compartment.

Production quality control during the operation of natural gravel Nongling hydropower production run quality control process is to ensure that the quality of a key link in the

aggregate, such as the full feed, filled with crushing, crushing rate increase, discharging granularity control equipment to minimize once broken to become a

The proportion of material goods, broken, crushed finely segment selection, control every stage crushing crushing ratio, to avoid the re-formation of flakiness stone; adjust

aggregate ratio control level within the ultra-Hudson Trail aggregate content, control of natural fine sand degree modulus and dust content, clay content and other control

aggregate. These

Quality problems, in addition to strict production rules, it must also take all the necessary technical means and technological measures to ensure the quality aggregates and

ultimately ensure the quality of concrete.

(A) control equipment nesting size. Equipment nesting size control of the main objectives: first, to make the rational allocation of broken machinery running, the second is to

reduce aggregate flakiness finished proportion Third, adjust the finished aggregate proportion of each grain. If crusher GP100SC through technological innovation

After removing the internal feed wheel, the maximum increase in grain size is 40mm, the corresponding primary two sets PE400 × 600 jaw crusher discharge port width is adjusted

to 40 ~ 60mm. Thus, after primary crushing particle size greater than 60mm product was significantly decreased by two sieve again broken into 40 ~

20mm diameter products increased significantly, again broken product is less than 20mm, after several adjustments crusher discharge port width can adjust the product in the

proportion of fine aggregate. In the above process can achieve the same reduction aggregates flakiness content purposes.

(2) control aggregate mud content. Stone, clay content is produced by conventional indicators. Wool production in clay content to take control of the main measures are: wool

mining area covering stripped clean to ensure that mining wool to meet the quality standards and regulatory requirements; secondly according stockyard exploitation Fan

Wai and reclaimer standards, excavation sequence by side edges wool stripped overburden excavation, excavation slope ratio of 1:2 slope comprehensive excavation, excavation

average thickness calculated by 4m, including comprehensive consideration of 0.5m above water underwater part is 3.5m. controlling aggregate mud content main measures are:

First, to ensure wool exploitation rate; Second excavation process required to hand on the face appearing in oversized stone, mud, debris and other timely treatment to reduce

the production system in the production process due to oversized stone, mud, debris clogging and other contamination of the finished product; third is in the 1st tape machine

arrange for ultra-

Diameter stone, mud, debris processing, the use of aggregate screening when flush screen surface on each additional high-pressure hose, rinse the remaining soil to reduce the

amount of refined clay aggregates.

(3) within the control of the particle size grade oversized aggregate content. Adjust the size of oversized aggregate content within level process measures are as follows:

Firstly, crushing levels of feeding, nesting width adjustment crushing ratio, by adjusting the particle size of more than 40mm crushed aggregate excess broken into small

aggregates, the use of belts

Machine Part 20 ~ 40mm transhipment will broken again in the aggregate shaping; 10% of the enlarged screen mesh, ensuring screening, sieving rate increase under the premise of

conscious oversized content to supplement aggregate crushing caused by high drop Johnson Trail . These processes regulate the source material in Nongling change and each station

using a single material

Position on the various grading finished aggregate demand changes, the aggregate production for 20 ~ 5mm in proportion to the new request to get a better application. In

addition, to strengthen quality control of daily work, regular intermediate products and final products of each particle size curve analysis, according to the conclusions of

timely investigation

Related processes.

Conclusion Nongling natural gravel hydropower production system during operation through strict quality control and inspection, so that the aggregate production of various

technical indicators meet the requirements, the quality of concrete pouring for the dam to provide a guarantee, but also for similar system construction provides

Can learn from the experience.

parsing cutting efficiency crushing plant

Chipper shredder chipper shredder is forestry biomass chipper crushed to compact molding process requires particle size of the device. Chipper shredder processing mechanism is

to first forestry biomass material into the chipper shredder hopper, the material of human and pass under its own weight

Through the inlet into the chipper shredder, when the material face encounter knife knife drum (cutter) face, the feed is stopped, cutting knife to the cutting position, because

there is a certain angle knife when cutting wood a certain depth, the timber by the knife blade cutting surface and bottom hinder contribute

, Local wood fiber direction along the crack into the wood, from the rake face fly. The cutting process, the wood weight and knife cutting force the action to continue to Drum

(cutter) feed, the cutting can be carried out continuously, complete the timber are processed, cut the large chips on machine

Inside the high-speed air driven with crushing equipment hammer collision further crushing, while substandard chips through the bottom of the screen along the discharge port.

Small drum chipper shredder is mainly for smaller diameter class forestry biomass materials, especially in the northwest region's rich desert shrubs resources because desert

shrubs bark content, toughness, slightly tender part of a long, easy to cut (cut rate was 50%), in order to increase cutting

Agencies and cut the frequency of contact materials to be processed and improve equipment efficiency, choose to use a long knife, throwing knives and cutting the gap between the

fixed knife set can be adjusted, and select high cutting speeds, so for different The material is adjusted to improve the cutting of materials

Rates, lower tender little chance of winding drum knife; while reference straw, rattan and other grains, feed mill hammer design, plus a number of knife drum crushing hammer,

increasing the material in the enclosure by the impact, friction, and improve shrubs, branches, straw-like material crushing chipper

Results. Ideally, the longitudinal direction of the fiber material should mainly be cut by the knife, the material separation between fibers mainly by the crushing hammer to

complete. The aircraft is equipped with a power source to a Taiwan 2.2kw maximum speed 2800r/min Rated power three-phase asynchronous motors,

The V-belt reducer motor power is transmitted to the spindle; choose manual feed mode (if in the future for mass production, can be equipped with force feeding) and a lower

discharge mode, which would allow chipper cutting small particles can also be from the chassis more convenient discharge, chipper shredder

Spindle is horizontal, gravity knives and cutting drum vertical component shared equally by the two bearings, the prototype compact structure, small size, low center of gravity,

processing and moving relatively stable, suitable for field use in harvesting.

Chipper shredder vibration is caused by mechanical vibration measurement equipment structural damage and reduce the life of the important reasons. In addition, the mechanical

structure of the vibration of the noise generated mainly. Vibration on the human body will produce great harm, prolonged exposure to vibration environments who will lead

From a wide range of illnesses, we can see that vibration control is necessary. Rotary machine in operation will have a greater vibration, for the surrounding environment;

chipper is a rotation of the elastic system, under certain conditions (for example, when the rotary member imbalance or cutting force variation) will produce laser

Vibration force vibration. When the amplitude exceeds the allowable range, will cause wood processing surface roughness, tool wear and tear, reduced productivity, and in severe

chipper shredder can not even work.

Measuring points to determine the location of wood chippers of the vibration load is mainly driven member transmitting motion of spindle rotation and vibration generated when

the engine vibration; work mainly from the vibration is vibration of the engine and the knife drum (cutter) Cutting vibration generated when the timber. To understand the

Chipper shredder vibration characteristics of the prototype load speed vibration test, the prototype uses the electric motor as the power source, the main source of vibration

spindle drive components should be generated when the vibration transmitting motion. In the prototype spindle and chassis were set five measurement points, respectively, knife

shaft ends

Bearing top measuring point 1, the measuring point 2, the two sides of the chassis measuring points 3 and 4 measuring points, the top surface measuring point 5, each measuring

points are arranged on a portable vibration measuring instrument, the use of data acquisition cards.

Experimental results, the pulley 1 side bearing measuring point 1, the housing 3 Vibration velocity measuring point is greater than the other side of the corresponding measuring

point 2, the measuring point 4, which is due to the biomass chipper end mill shaft 1 rigid with the pulley connecting the motor to the power transmitted through the belt

mechanism prototype spindle

The spindle drive Drum doing rotational movement to complete the cutting operation, the transmission process of the belt tension will cause the spindle discontinuity, pulleys

one side bearing excessive force increased wear, inspired spindle vibration, transmitted to the spindle the other side of the bearing and vibration transmission to the housing;

another

In the cutting process of crushing with cutting speed increases, the value of each point vibration velocity gradually increases, when the speed is higher than 1231r/min when

increasing trend more apparent.

When the chipper shredder load high-speed operation, the noise level values ​​increase with the speed a clear upward trend in the speed reaches 1231r/min, the noise level can

reach values ​​87.4dB (A). Chipper shredder noise enhancement, mainly due to the vibration of the body with the speed increase

Increase triggered, and since the chassis Drum rotates blade on the drum cutter device speed cutting surrounding air, causing the chassis air pressure pulse will produce noise.

Conclusions and recommendations of the foregoing analysis, the rotational speed is chipper shredder chipper shredder noise intensity and vibration intensity main factors, when

the speed is increased chipper shredder sound pressure level noise and vibration velocity values ​​were significantly increases, the material of forestry biomass chipper crushed

Quality and equipment operators adversely affect the health of the corresponding experimental data in the actual production chipper shredder speed should be controlled at

1231r/min less.

To further reduce the noise level and vibration velocity values, chipper shredder power transmission can choose to use flexible couplings achieve chipper shredder is directly

connected to the spindle motor, belt drive means to cause to eliminate unilateral pressure shaft large side of the machine vibration imbalances

Like; addition to the chipper or shredder housing for increased thickness for external stiffener treatment can increase the natural frequency of the housing itself, thus to

improve their structural stiffness and strength, reduces vibration and noise radiation housing, control vibration transmission.

Grade gold material micro hybrid material crushing process discussed

Experimental Methods (1) using different methods milling milling molybdenum-copper powder, compared to different milling manner of molybdenum-copper composite powder properties,

find out the best way to milling. (2) using the above test to determine the best way to milling, ball milling time was 5,10,

15,20,25 h molybdenum-copper powder milling experiments to determine the optimum milling time, prepared to meet the requirements of nano-molybdenum-copper composite powder.  crusher manufacturer

Different milling methods and the relationship between particle size used in this experiment ordinary roller mill, planetary ball mill, high-energy ball milling manner three

different molybdenum-copper powder, compared to its particle size. A mixed powder of molybdenum-copper raw SEM photographs. General drum molybdenum-copper powder prepared by

ball milling

The molybdenum powder, copper powder and nickel powder, mixed with a certain proportion in the QM-2SP16 roller ball mill grinding. Ball to powder ratio of 10:1, ball speed is

150r/min, milling time of 200h. 2 is a roller ball molybdenum SEM photograph of the copper powder.  double roller crusher

From the roller ball 200h SEM photograph of molybdenum-copper powder can be seen as good plasticity of copper powder, copper phase of willow-like, and the uneven distribution of

copper was not observed in the molybdenum powder coated surface, indicating roller milling on Copper crushing effect is not good. Furthermore, the maximum particle of molybdenum

powder

Up to 5 ~ 10μm, and thus description of its use manner milling drum speed is too slow, and not of the mechanical alloying, but the plastic deformation occurs copper,

molybdenum-copper powder may determine the size hardly changed.

Planetary ball milling the ratio of molybdenum-copper powders suitable molybdenum powder, copper powder and nickel powder mixed in XXQ-200 planetary ball mill, ball mill, ball

to powder ratio of 10:1, ball speed is 400r/min, milling 48h. Three planetary ball milling for 48h SEM photograph of molybdenum-copper powder. The Planets

After milling, can be found in the willow-like copper phase becomes smaller, and the distribution is uneven, but the particle size of the powder particle size thinner than the

original, the size of about 5μm. Description milling process on the planet continues to smaller particle size, but did not reach the nanometer scale.

High Energy Ball Milling proportionally molybdenum-copper powder with a good molybdenum, copper and nickel powder in SPEX8000M high energy ball mill milling. Ball to powder

ratio of 10:1, ball speed is 400r/min, milling time of 20h. 4 is a high-energy ball milling of copper powder molybdenum 25h SEM photograph.

Different energy ball milling time and the relationship between the raw material powder size molybdenum powder, copper powder and nickel powder by mixing after SPEX8000M high

energy ball mill 5,10,15,20,25 h high energy ball milling. 5 for the different energy ball milling milling time powder X-ray spectrum.

It can be seen from the 5, Mo-Cu mixed powder within the structure of the mechanical alloying process, the powder repeated deformation, local strain increases, causing the

defect density is increased, the local shear with a density of defects such as the critical value, grain crushing. This process is repeated crystallization

Continue to refine the grain until it reaches the nanoscale. The extension of the milling time, Mo and Cu diffraction peak broadening, until the Cu peak disappears. Shows Mo and

Cu alloy powder is a solid transition remains. In the high-energy ball milling 25h after the formation of nano-powder, a considerable part of the Cu segregation provided in Mo

Large number of grain boundaries, thus losing the diffraction characteristics, namely the X-ray diffraction spectrum, showed a single phase structure.

Calculated using the approximate function method, under different milling time Mo-Cu composite powder having an average grain size. The results show that the beginning of the

powder particle size decreased rapidly, slowing down after a certain size, then welded powder milling process to reach equilibrium with the crusher. After 25h

After grinding Mo-Cu composite powder having a particle size up to about 30nm.

High-energy ball milling time of different Mo-Cu powder as 6 shows an SEM photograph (25h milling molybdenum copper powder morphology see Figure 4).

As can be seen from the 6,4, short-energy ball milling of powders with visible metal foil for powder welding fit. This is because the elastic modulus of molybdenum is very high,

difficult to deform, is brittle material.

Copper good plasticity. Milling process, molybdenum, copper powder particles two elements are not the same as the process of change, molybdenum powder brittle material under the

impact ball deformation difficult, and when the collision intensity exceeds the breaking strength after the molybdenum powder, molybdenum powder occurs fracture, due Powders

Cu has good ductility, powder ball impact, the copper deformation occurs first, into a sheet, plate. Milling in progress, constantly breaking refine molybdenum powder, and

copper is deformed broadening, collision copper molybdenum powder will be captured, and then in the role of ball

Molybdenum is crashed or pressed into copper, the formation of Mo-Cu composite powder. Molybdenum is not blindly fracture, thinning, when molybdenum particle fracture, the

fracture surface is fresh atomic surface activity is high. If a collision course, just two fresh fracture surface molybdenum particles have repeatedly broken in touch

Split and re-welded back and forth for, continue to occur, the powder particle size also will continue to refine, and ultimately the formation of a uniform distribution of

copper phase coated with molybdenum molybdenum-copper composite powder nano.

Conclusions (1) By way of different milling powder morphology, general milling, planetary ball mill structure and composition can not be uniformly distributed nano-alloy powder,

and high-energy ball milling method can be obtained. (2) by means of high-energy ball milling for different times of the powder morphology can be

Seen after 25h ball milling, making the powder subjected to calendering, lamination, crushed in pressing (ie cold welding - crush - then cold welding) iterative process, the

final structure and composition can be uniformly distributed nano-alloy powder . (3) by means of high-energy ball milling for different times of the powder X-ray

Diffraction, it can be seen by high energy ball milling molybdenum 25h disappearance Cu phase Cu powder, a considerable part of the Cu Mo Segregation provided in a large number

of grain boundaries of the alloy powder is calculated nm 30nm.

Kun crusher crushing grinding system semi-processed practice and work experience

Cement grinding system equipment, the main technical parameters Name Type Main technical parameters roller press RP12.5-140/105 maximum pressure (kN) 12500 roller diameter (┨)

1400 Roll width (┨) 1050 Power (kW) 2 × 750 by the amount (t / h) 445 Voltage (v)

6000 broken machine DAG-1900 Rotor diameter (┨) 1900 Motor Power (kW) 250 Voltage (v) 6000 Separator SKS-2500 Rotor diameter (┨) 2500 Motor Power (kW) 132 separator air flow

(m3 / h) 20200 Voltage (DC) (v) 440 mounted ball 3.8m × 12m

Weight of ball (t) 125 average ball diameter (┨) 18.50 Motor power (kW)

Select the nip roll nip determined by volume and the density level of the cake, the roll press working process, if large particles or individual encounters super lump, the

roller press with a bag-shaped accumulator , the instantaneous floating roller can move through it, to protect the roller surface is not broken

Bad and found the roll surface damage (spalling, potholes, etc.), can be used to repair welding method, after welding to ensure its concentricity 1396 ± 41mm, shaft diameter

1398 ± 2mm, roll width 1050 ± 2mm, are not allowed to have pores , slag, cracks and other defects, surface hardness to reach HRC62-65. nip

The choice also with the feed end of the sliding gate width adjustment related material gate adjust the size of the column section, thereby affecting the cake thickness and

yield, ram adjustment request is equal adjusted so that the material does not feed roller press nip off the centerline, ram adjustment is driven by the motor, roller

Press near the manual control button to adjust the quick and easy.

Factors affecting production mill a material impact mill grindability of the main factors is the ability of the material grindability grindability of materials refers to the

ease of the material to be grinding, grindability of materials and material properties about. Materials by roll after size reduction, grindability get

Improvement of the system yields improved. Dongchu poor clinker grindability of cement clinker production is low, good grindability of clinker grindability poor clinker with the

use of Dongchu just produced clinker and clinker mixed use, so as not to make the cement production is too low, both to ensure

Cement production but also to ensure that the indicators of cement grinding qualified.



System problems and improvement measures for system startup drive process improvement program through the system to open the vehicle's many improvements, making the system

start-up time from the initial production debugging nearly an hour when the time is shortened to about 15min now greatly shorten the mill when idling

Room, reducing the impact of the ball on the liner wear, ball wear and cement their over-grinding phenomenon, saving power consumption.



Cement conveying system transformation is used when the original design of pneumatic conveying, the use of the actual production is not very good, such as the failure rate of   crushing equipment

the pump, bearing seals often damaged, resulting in burning the bearing, the high cost of the vane, the wear , fuel consumption and other shortcomings. Use workshop

Overhaul of the time on the transport system has been modified from the original to the current pneumatic conveying bucket, air chute conveyor. After the transformation,

reducing the dust concentration, reducing the failure rate, and significantly reduces the amount of equipment maintenance, improved working environment of employees, the system

Power consumption is reduced, thus saving the cost of production.  feeder breaker