Coal gangue is one kind of solid waste discharged during coal mining and washing. It is a black-gray rock with low carbon content that accompanies coal seams during coal formation, and it is harder than coal. The main components of coal gaugue are Al2O3 and SiO2, and it also contains varying amounts of Fe2O3, CaO, MgO, etc, and trace amounts of rare elements, e.g: gallium and vanadium.
The large amount of coal gangue accumulation not only occupies land resources, but also causes serious pollution to the environment, so it has always been a problem that has plagued coal industry. However, with the emergence of coal gangue pulverization technology, this problem has been solved, meanwhile, it provides new ways for the comprehensive utilization of coal gangue.
Uses of coal gangue after pulverization
Coal gangue pulverization is to crush and grind coal gangue into powders of different fineness. After pulverization, coal gangue has multiple uses, which mainly includes the following aspects:
1. As building material
– Building bricks
Mixing coal gangue powder with other materials can make better quality bricks for building houses and walls, reducing costs.
– Cement
Coal gangue powder can also be used in cement production. As a mixed filler, cement can replace part of the clinker to improve the strength and durability of cement.
– Concrete
Adding an appropriate amount of coal gangue powder into concrete can improve the performance of concrete, and increase the density, strength and impermeability of concrete.
2. As chemical raw material
Coal gangue contains a certain amount of aluminum, silicon, iron and other elements. These elements can be extracted by chemical methods and used to produce chemical products, e.g.: to extract aluminum oxide, sodium silicate, ferrous sulfate and other chemical products.
3. As soil conditioner
Coal gangue powder contains rich minerals and trace elements, so it can act as a soil conditioner to improve soil fertility and adjust soil pH, and than increase crop yields. In addition, coal gangue powder can act as a fertilizer additive and mix with chemical fertilizers to improve the utilization rate of chemical fertilizers.
In addition to these main uses, coal gangue powder can also be used in road engineering, backfilling collapsed areas, filling mine voids, etc.
Application prospects of coal gangue
With the continuous improvement of people’s environmental awareness and the increasing severity of resource shortages, coal gangue will be used more and more widely. At the same time, comprehensive utilization of coal gangue pulverization will become more and more common, and it will make greater contributions to the sustainable development of coal industry and environmental protection.
Qingdao Epic Powder Machinery Co., Ltd. is a manufacturer specializing in the production of powder processing equipment. The ball mill produced by our company is suitable for the crushing and grinding of coal gangue, with excellent performance, and it is widely praised by consumers.
Our main products include:
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If you have relevant demands for ball mill or other products from Qingdao Epic, contact our staff directly, we are always here for you.
Below are ball mill from Qingdao Epic for your reference.
