Fine Sand Recycling In Sand Washing Line

Summary

As is known to all, in the reasonable and environmentally friendly configuration method of the entire sand production line, it is a popular trend to equip with pulse dust collector and water sand washing machine. In the effluent of wet sand washing, the fine sand and surface sand are inevitably lost

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Detailed Introduction

As is known to all, in the reasonable and environmentally friendly configuration method of the entire sand production line, it is a popular trend to equip with pulse dust collector and water sand washing machine. In the effluent of wet sand washing, the fine sand and surface sand are inevitably lost with the flow of water. Each production line generally loses 5% -25% of content, and the amount of loss in one year is very amazing. If these lost parts are collected, this part of the profits will also be considerable. This article shares four methods of fine sand recovery.

Sand washing machine classification

Sand washing machine is divided into bucket sand washing machine and spiral sand washing machine. The bucket sand washing machine is widely used for the washing of materials in the fields of mining, building materials, chemical industry, transportation, and concrete mixing stations. The sand washing process is a circular motion. Spiral sand washing equipment uses the propelling effect of spiral blades to clean the soil. Compared with wheel sand washing machines, spiral sand washing machines have a higher degree of cleanliness and better stone cleaning effects. In the same way, using different proportions of sand, mud, and water to extract sand, water and mud flow along the chute.

However, no matter which kind of sand washer, in the process of agitating the water source, most of the sand will inevitably be taken up, and it will flow away from the water tank while it is not clear. Then inevitably caused most of the loss.

1. Multi-stage sedimentation tank precipitation method

The sand washing wastewater flows into the sedimentation tank. It is best to be equipped with 3 layers, and the sediment will be deposited layer by layer over time. Because the proportion of sand and mud is heavier, it can be separated after a relatively long time.

Of course, this method also has disadvantages. The long-term sedimentation process occupies a large area of ​​the sedimentation tank, and it is necessary to manually excavate the sedimentation sand and sedimentation mud in the later stage, which consumes a lot of time and labor.

2. Equipped with dewatering screen equipment

The sand washing wastewater is directly discharged to the screen surface of the linear dewatering screen to recover the lost sand.

The disadvantage is that there is little or no mud in the raw material, there will be no problem, but if there is too much mud, the last link will be rendered useless, and it will not play a recycling role at all. What is recovered is a sediment mixture.

3. Recovery of fine sand recovery device

The sand washing wastewater is directly discharged to the lower water tank part of the fine sand collector, and the mixed sand mud water is hit to a cyclone separator by a slurry pump and then discharged to the screen surface. The fine sand part is discharged along with the screen surface, and mud and water are discharged. It flows back to the lower tank to form a cycle, which continuously extracts sand from the wastewater.

No other faulty and theoretical problems have been found for the time being, and the fine sand recovery device is relatively recognized on the market.

Fine sand recovery machine operation should pay attention to two points: First, do not feed materials at startup, it is recommended to feed materials after idling a few times, which is more reasonable and can reduce the burden on the equipment; the second is to consider the overall power when configuring the transformer, Appropriately configure some voltages to ensure that the equipment can work normally and will not run at low voltage.

4. Add chemical agents

The lost sand water is discharged into the sink pond, and a chemical agent that can cause the mud and sand to quickly aggregate into floc is added to achieve rapid separation of the sand and mud. However, this method is often used in the slime industry for the recovery and use of fine coal and fine coal. The use in sand and gravel yards has certain limitations and cannot be popularized for the time being.

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