Development and utilization of coal based kaolin

During the coal mining process, a large amount of coal gangue is generated. When the content of kaolin in the gangue exceeds 80%, it is called coal series kaolin, which is an important non-metallic mineral resource unique to China, with unique characteristics and broad utilization prospects. Coal based kaolin is a precious natural resource and an important non-metallic mineral. It has many properties that can be utilized, such as fire resistance, electrical insulation, chemical stability, dispersibility, etc. The developed kaolin can be used in industries such as papermaking, rubber, paint, chemicals, building materials, metallurgy, ceramics, glass, electric porcelain, petroleum, etc. It is an indispensable mineral raw material for many industrial sectors.

At present, there are the following main problems in the development and utilization of coal based kaolin industry in China:

(1) The scale of calcined kaolin enterprises in the industry is small, with high management costs, technological research and development, and a single product;

(2) After large-scale coal mining equipment and mechanized mining, high-quality coal gangue is mixed with other impurities, which limits the comprehensive utilization of coal gangue resources;

(3) At present, the utilization of coal based kaolin is still mainly focused on low-end development or raw material sales, which affects its deep development and utilization.

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