Coal mining and coal washing wastewater treatment

As the tunnels extend further, the water quality underground has deteriorated, with an increasing amount of coal sludge in the water. Through the research and application of mine water treatment and recycling technology, not only has the direct discharge of mine wastewater been reduced, lessening environmental pollution, but also it is of great significance to ensure the safety of the mining area and the adequacy of living water supplies, as well as to achieve the utilization of mine wastewater.

Advantages of ultra-magnetic separation in underground coal mine applications include: It effectively solves the难题 of clearing silt from water storage areas in mines, reducing the safety risks associated with underwater silt removal operations. After treatment with ultra-magnetic separation equipment, the removal rate of suspended solids in water exceeds 97%. The silt removal in water storage areas can be delayed for over 10 years. The treatment time is short, and the separation speed is fast; it takes only 4.5 minutes from reaction to separation, and the effluent water quality meets the national coal mine water discharge standards. It achieves clean water storage and clean water lifting, treats water bodies from the source in the mine, completely achieves standard discharge, and provides more reliable and favorable basic conditions for the deep treatment of subsequent mine water. It expands the effective storage capacity of water storage areas, improves the safety coefficient of water storage, improves the working environment of the pump lift system and pipeline systems, significantly reduces the operational load of the central pump house, saves electricity, and conserves energy; the coal slime is dried and transported to the surface, maximizing resource utilization and creating greater economic value; it achieves direct reuse of water for underground operations (such as dust control, cooling, fire fighting, etc.), changing the situation of repeated transportation to the surface and re-injection into the mine.

High degree of equipment integration significantly reduces the footprint of engineering facilities. Compared to traditional water treatment facilities, the area required is only 1/8 to 1/10 of the traditional size. It maximizes the use of existing underground tunnels and sites, minimizes the expansion work for the cave rooms, and promotes energy-saving investments.