Coal Washing Process

Coal washing is a processing technology that adopts physical, chemical or microbiological methods to separate coal and impurities by their differences in physical and chemical properties. The coal beneficiation methods can be divided into physical coal beneficiation, physical-chemical coal beneficiation, chemical coal beneficiation and microbiological coal beneficiation.

Physical coal beneficiation

The physical coal beneficiation separates coal and impurities by their differences in physical properties (including granularity, density, hardness, magnetism and electric property). The most popular physical coal beneficiation methods include gravity beneficiation, jump titanium beneficiation, dense medium beneficiation, chute beneficiation, shaker beneficiation and wind power beneficiation.

Physical-chemical coal beneficiation

Physical-chemical coal beneficiation-coal flotation (or flotation for short) is a process that separates ores by their differences in physical and chemical properties on the surface. At present, there are a variety of flotation equipments, including mechanical agitation flotator and non-mechanical agitation flotator.

Chemical coal beneficiation

Chemical coal beneficiation is a process that concentrate the useful elements and dispose of impurities and harmful ingredients through a series of chemical reactions. At present, laboratories usually dispose of sulfur by chemical methods, which can be divided into alkaline process, oxidization process and agent extraction from the perspective of agent and reaction principle.

Microbiological coal beneficiation

Microbiological coal beneficiation is a process in which certain autotrophic microorganisms and heterotrophic microorganisms directly or indirectly leaches sulfur by their metabolites, thus disposing of sulfur.

The coal beneficiation process of coal preparation plant

1. Preparation of raw coal: The process includes the receival, storage, crushing and screening of raw coal.
2. Beneficiation of raw coal: The process includes jump titanium-flotation joint process, dense medium-flotation joint process, etc.
3. Dehydration of products: The process includes the dehydration of lump coal and duff dust, dehydration of flotated coal concentrate, and the dehydration of slurry.
4. Drying of products: The process dries the coal by heat.
5. Processing of coal slime.

Coal washing machines

ZENITH has offered a large number of washing machines for large ore preparation plants, large coal preparation plants and large cement plants. These machines feature great processing ability, high beneficiation efficiency and reliable operation.

Sand washer is a washing machine for artificial sand (including natural sand). Sand-washer is widely used in the washing and beneficiation of materials in gravel plants, mining industry, building material industry, transportation, chemical industry, hydroelectricity plants and concrete batching plants.