Coal series kaolin and its processing and utilization

Our country's coal-measure kaolin reserves are very abundant. Coal-measure kaolinite has a complete range of types and excellent quality. It is an important kaolin resource. Coal-bearing kaolinite resources, the calcined kaolin products have high whiteness and have great development and application prospects. As a manufacturer of coal-based kaolin processing equipment, HCM will introduce to you today coal-based kaolin and its processing and utilization.

Hard kaolinite mainly exists in coal measures, and its surface characteristics are often dense and massive, sandstone-like. Because it contains organic matter and impurities, most of them are black, gray, brown, light green, gray-green and other colors. The fracture is porcelain or shell-shaped, matte to waxy luster, hardness is about 3, and the streaks are gray-white. Kaolinite has extremely poor water absorption. After being broken into small particles, it has no plasticity or cohesiveness. According to the occurrence, origin and physical properties of the ore, coal-measure kaolinite is divided into coal-seam roof and floor kaolinite deposits, gangue-incorporated kaolinite deposits and kaolinite deposits that are not connected to the coal seam. . Different resource characteristics basically determine the industrial direction that the resource can be suitable for development. Kaolinite is mostly used for industrial purposes, and kaolin products can be obtained after grinding and calcining. High-quality kaolin has properties such as softness, high whiteness, and easy dispersion and suspension in water. Therefore, kaolin has become a mineral raw material required in related industries such as ceramics, chemicals, pharmaceutical coatings, rubber, building materials, metallurgy, and national defense.Ridge rock has become a mineral raw material required by related industries such as ceramics, chemicals, pharmaceutical coatings, rubber, building materials, metallurgy and national defense. Because the composition of kaolinite from different origins is slightly different, some contain a number of trace elements that are beneficial to the human body, such as selenium, germanium, strontium, iodine, etc., which are used in the field of personal health care products, and are also high in some cosmetics (especially facial masks). Ridge rock composition.

Coal-based kaolin processing technology: Semi-hard-semi-soft-soft kaolin in coal-based kaolin can be dispersed in water with or without crushing. Due to the special physical and chemical properties of hard kaolin, the processing and sorting process is different from that of soft kaolin.

1. Dry mechanical crushing: At present, many manufacturers use Raymond mill to process coal-based kaolin into 200 (325) mesh soil powder. This soil powder is mainly used for rubber, plastics, paint fillers and ceramic raw materials.

2. Calcining and grinding: Since sedimentary kaolinite mostly contains organic carbon, the most economical and simple way to remove carbon is the calcination method. Calcination of kaolinite can not only obtain products with higher output value, but also improve the whiteness of the product. . The particle size of calcined kaolin often fails to meet industrial requirements, so it is necessary to further grind it with an ultra-fine mill. HCM Machinery can provide ultra-fine vertical mills to grind kaolin to the required particle size range.

3. Use kaolin to synthesize zeolite: As a molecular sieve, zeolite is widely used in the adsorption, drying, separation and purification of gases and liquids, catalysis and cracking of petroleum, soil improvement, etc. The raw materials of artificial zeolite are mainly silicon compounds, aluminum compounds, alkali and water. The chemical composition of high-quality kaolinite in the coal system is close to the theoretical value of kaolinite. This kaolinite can be synthesized into artificial zeolite by calcining it with aluminum compounds, alkali and water under certain physical and chemical conditions.

Shanxi and Inner Mongolia coal systems contain a large amount of kaolinite. The development and utilization of kaolinite resources in coal gangue can turn waste into treasure, further develop circular economy and extend the industrial chain, and have significant mining environmental and economic benefits. As a coal-based kaolin clay processing equipment manufacturer, Guilin Hongcheng produces Raymond mills, ultra-fine vertical mills, vertical mills and other equipment that have been widely used and recognized in coal-based kaolin processing and utilization projects. If you have related processing needs, please leave a message:mkt@hcmilling.com