Processing system and construction method capable of improving fineness modulus of natural sand

The present invention will be further described below in conjunction with the drawings.

See figure 1 , A processing system for improving the fineness modulus of natural fine sand, which includes sand conveying barge belt conveyor 1, sand conveying barge belt conveyor 1 is connected to wool yard 5 through second belt conveyor 2, third belt conveyor 4, and wool There are multiple electric vibrating feeders 6 at the lower part of the yard 5 to feed the fourth belt conveyor 8. A single-layer circular vibrating screen 9 is provided under the head of the fourth belt conveyor 8. The five-belt conveyor 10 is connected to the feed port of the jaw crusher 12 through the fifth belt conveyor 10, and the discharge port of the jaw crusher 12 is connected to the fourth belt conveyor 8 through the sixth belt conveyor 13, a single-layer circular vibrating screen 9 is connected to the semi-finished product yard 14 through the seventh belt conveyor 11 under the sieve. The lower part of the semi-finished product yard 14 is equipped with multiple electric vibration feeders 15 to feed the eighth belt conveyor 16, and the eighth belt conveyor 16 is provided under the head There are multiple double-layer circular vibrating screens 17, 23, and the lower part of multiple double-layer circular vibrating screens 17, 23 are equipped with multiple finished product storage yards 19, 22, 26, 29, 50, and different grains will be obtained in the multiple finished product storage yards. Concrete aggregate for the diameter range.

An iron remover 3 is provided on the upper part of the head of the second tape conveyor 2.

The multiple double-layer circular vibrating screens 17 and 23 are arranged in the upper and lower positions in sequence.

The aggregates on the first layer of multiple double-layer circular vibrating screens 17 are connected to the first finished product storage yard 19 through the ninth belt conveyor 18; The belt conveyor 20 and the eleventh belt conveyor 21 are connected to the second finished product yard 22.

The aggregates on the first layer of multiple double-layer circular vibrating screens 23 are connected to the third finished product yard 26 through the twelfth belt conveyor 24 and the thirteenth belt conveyor 25; the second layer of multiple double-layer circular vibrating screens 23 The aggregate on the screen is divided into two paths through the fourteenth belt conveyor 27, one path is connected to the fourth finished product yard 29 through the fifteenth belt conveyor 28; the other path is connected to the regulating yard 31 through the sixteenth belt conveyor 30, multiple The bottom of the second layer of the double-layer circular vibrating screen 23 is connected to multiple spiral sanding machines 46 through multiple grit boxes 45, and the sand selected by multiple spiral sanding machines 46 passes through the seventeenth belt conveyor 47 The eighteenth belt conveyor 49 is connected to the fifth finished product yard 50.

There are multiple electric arc doors 32 below the regulating and regulating yard 31 to feed the nineteenth belt conveyor 33. The outlet of the nineteenth belt conveyor 33 is connected with the inlet of the vertical shaft impact crusher 34. The vertical shaft type The discharge port of the impact crusher 34 is connected with the twentieth belt conveyor 35. The lower part of the discharge port of the twentieth belt conveyor 35 is provided with multiple double-layer circular vibrating screens 36. The aggregates on the first layer and the second layer are connected to the nineteenth belt conveyor 33 through the twenty-first belt conveyor 37; the sand water under the second layer of the multiple double-layer circular vibrating screens 36 enters the grit box 38, multiple The lower part of the grit box 38 is provided with a plurality of spiral sand shakers 39, and the discharge ports of the multiple spiral sand shakers 39 are connected to the artificial sand storage yard 41 through the 22nd belt conveyor 40.

A first electronic scale 44 is provided in the middle of the twenty-third belt conveyor 43 at the lower part of the artificial sand storage yard 41.

A second electronic scale 48 is provided in the middle of the seventeenth tape conveyor 47.

There is a production waste water treatment facility 51 in the system, and the waste water generated in the system is unified to the waste water treatment facility 51 for treatment, and the treated water is recycled to the production water of the processing system.

The method for processing natural fine sand using the above-mentioned processing system capable of adjusting the fineness modulus of natural sand includes the following steps:

1. Plan multiple mining areas in the natural sand and gravel yard, design the mining ratio of each mining area according to the gradation difference of each mining area, and conduct orderly mining to ensure that the mining wool grading into the processing system is uniform in thickness;

2. The natural sand and gravel material from the excavation is transported by the sand dredger to the dump barge and transported to the sand conveying barge 1. The sand conveying barge 1 relies on its own belt conveyor to transport the natural gravel material to the second belt conveyor 2. The iron remover 3 is installed on the machine 2 to remove the iron parts mixed in the sand and gravel material, and then transported by the second belt conveyor 3 to the third belt conveyor 4 with unloading trolley to the wool yard 5 for storage;

3. There are multiple discharge ports under the wool yard 5, and a motor vibrating feeder 6 is correspondingly installed under each discharge port, and the wool yard 5 is stacked by the motor vibrating feeder 6 The sand and gravel material source is discharged to the first belt conveyor 7, and the loaded wool is transported to the single-layer circular vibrating screen 9 through the first belt conveyor 7 and the fourth belt conveyor 8 for screening. The five-belt conveyor 10 is transported to the jaw crusher 12, and the aggregates crushed by the jaw crusher pass through the sixth belt conveyor 13, the fourth belt conveyor 8, and the single-layer circular vibrating screen 9 to form a closed circuit for crushing and screening;

4. Aggregates of multiple double-layer circular vibrating screens 9 with a size of 150mm or less are transported to the semi-finished product yard 14 for storage by the sixth belt conveyor 11;

5. The lower part of the semi-finished product yard 14 is equipped with multiple electric vibration feeders 15 to feed the eighth belt conveyor 16. Under the head of the eighth belt conveyor 16, there are multiple double-layer circular vibrating screens 17, 23, multiple double The first layer of over-screen aggregates 80~150mm of the layer circular vibrating screen 17 are transported to the first product storage yard 19 by the ninth belt conveyor 18 for storage; the second layer of over-screen aggregates 40 of multiple double-layer circular vibrating screens 17 ~80mm is transported to the second finished product yard 22 through the tenth belt conveyor 20 and the eleventh belt conveyor 21; the second-layer under-sieve aggregates of multiple double-layer circular vibrating screens 17 pass through the guide material The trough enters multiple double-layer circular vibrating screens 23;

6. The 20-40mm of the first layer of multiple double-layer circular vibrating screens 23 is transported to the third finished product storage yard 26 through the twelfth belt conveyor 24 and the thirteenth belt conveyor 25, and multiple double-layer circular vibrating screens The aggregate of 5-20mm on the second layer of the sieve 23 is divided into two paths by the fourteenth belt conveyor 27, one is transported to the fourth finished product storage yard 29 through the fifteenth belt conveyor 28, and the other is passed through the tenth Six belt conveyor 30 enters the regulating yard 31 for storage;

7. There is an electric arc gate 32 under the regulating yard 31, and the 5-20mm aggregate in the regulating yard 31 is transported to the nineteenth belt conveyor 33 through the electric arc gate 32, and to the vertical shaft through the nineteenth adhesive tape conveyor 33 Sand making by the vertical impact crusher 34; the mixed material processed by the vertical shaft impact crusher 34 enters multiple double-layer circular vibrating screens 36 through the 20th belt conveyor 35 for screening;

8. Multiple sets of double-layer circular vibrating screens 36 on the first and second layers of the screen> 5mm aggregates are introduced into the 19th belt conveyor 33 and vertical shaft impact crusher 34 through the 21st belt conveyor 37 for closed crushing. A double-layer circular vibrating screen 36 The sand with a thickness of less than 5mm under the second sieve is introduced into the caisson 35 through the guide trough, and the sand condensed by the caisson 35 enters the spiral sanding machine 39, and passes through the spiral sanding machine 39 The selected sand material passes through the 22nd belt conveyor 40 and enters the artificial sand storage yard 41 for storage;

9. An electric arc gate 42 is set under the artificial sand yard 41, and the artificial sand in the artificial sand yard 41 is transported to the natural fine sand on the eighteenth belt conveyor 49 through the electric arc gate 42 to mix, and the mixed sand material Enter the finished sand storage yard for 50 storage;

10. An electronic belt scale is installed on the seventeenth belt conveyor 47 for transporting natural sand and the 23rd belt conveyor 43 for transporting artificial sand. By controlling the opening of the electric arc door 42 under the artificial sand yard, Adjusting the flow rate of artificial sand into natural sand can effectively improve the fineness modulus of natural sand. Using the above steps and methods, the fineness modulus of finished sand can be adjusted between 2.4 and 2.8.