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.