Screening Coal Washing Process
The screening coal washing process is mainly based on the different particles in the coal, using the screen surface with holes to separate the coal with different particle sizes, and then performing operations such as debris removal and dehydration.
The screening coal washing process is widely used in raw coal processing and preparation. .
According to different screening methods, sieving and washing coal can be divided into wet sieving and dry sieving.
Materials with a particle size smaller than the sieve hole pass through the screen surface, and coal with a larger particle size is retained, which can be recycled and reused to reduce coal waste.
Characteristics of coal washing wastewater
Coal washing wastewater is a weak alkaline colloid system, which is characterized by strong negative charges on the surface of the particles.
High concentration and CODcr; high content of fine particles; high viscosity sludge has large specific resistance and poor filtration performance.
coal washing processing
First, the coal washing water is collected into the conditioning tank.
The sewage from the conditioning tank is lifted by the pump, and the coagulant mixer is set on the pipeline behind the pump, and the coagulant is added before and after the coagulant mixer, and then enters the purifier.
Then, the clean coal is separated by the clean coal separation device, discharged through the equipment, and then separated by the Johnson screen dewatering to recover the clean coal.
After the clean coal is recovered, the wastewater is discharged from the top of the purifier through processes such as centrifugal separation, gravity separation, dynamic check filtration and sludge concentration, and the treated purified water is sent to the water purification tank for reuse or recycling and release. The concentrated slime discharged from the bottom of the purifier is discharged into the slime percolation drying tank, or dried by drying equipment for use.
Our Anping County BT Wire Mesh can customize the production of wedge wire screen mesh, Sieve Bend screens and the centrifuge screen basket is used in coal preparation plants,
and used in coal washing plants for dewatering and recycling.
After the slime is dehydrated, the impurities in the water are reduced, and the pipes will not be blocked, which helps to improve the circulation speed of the washing water.
At the same time, it has the advantages of high recovery rate, significantly reducing ash content and large processing capacity.
