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Coal gangue, a major solid waste generated during coal mining and processing, has long posed serious environmental challenges. Large-scale stockpiles occupy land, cause soil pollution through weathering, and lead to water contamination by plant. DeSun Environmental focuses on solid waste valorizatio

Coal gangue, a major solid waste generated during coal mining and processing, has long posed serious environmental challenges. Large-scale stockpiles occupy land, cause soil pollution through weathering, and lead to water contamination by plant. DeSun Environmental focuses on solid waste valorization and has developed an advanced Coal Gangue Washing & Recycling System that tackles these issues through “clean separation + resource recovery,” delivering both environmental protection and economic benefits.

Clean Separation for Maximum Resource Recovery

The system uses multi-stage washing, screening, and gravity separation to accurately sort the different components in coal gangue—coal, gangue rock, and fine sediments.

• Recovered coal can be reused for power generation or industrial production

• High-quality gangue rock is processed into construction aggregates or brick raw materials

• Sediments, after sedimentation treatment, can be used for roadbed backfill

This “full extraction” approach transforms coal gangue from a disposal burden into a valuable resource, fully supporting circular economy development.

Eco-Friendly Design for Zero Wastewater Discharge

To eliminate secondary pollution, the system is equipped with a high-efficiency wastewater treatment plant.
Washed wastewater goes through sedimentation, filtration, and purification before being recycled back into the process—achieving a reuse rate of over 95%.

The equipment also features:

• Sealed operation to minimize dust emissions

• Environmental compliance with dust and wastewater standards

This ensures clean, safe, and sustainable coal gangue processing from start to finish.

Flexible, Modular, and Easy to Deploy

Thanks to its modular structure, the system adapts to different processing capacities—from coal mine production sites to coal washing plant waste treatment stations.

Key advantages:

• Fast deployment without the need for large foundations

• Highly automated workflow reduces the labor requirement to only a few operators

• Stable separation accuracy ensures high-quality recovered materials suitable for downstream industries

This greatly improves processing efficiency while lowering overall operational costs.

Driving Green Transformation in the Coal Industry

DeSun Environmental’s Coal Gangue Washing & Recycling System not only solves the ecological challenges of gangue stockpiles but also unlocks their hidden resource value. By reducing land occupation, preventing pollution, and creating high-value recycled materials, the equipment provides strong technical support for the green transformation of the coal industry.

With its multi-functionality, efficiency, and outstanding environmental performance, this system has become a benchmark solution in the solid waste recycling sector.