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What is the effect of washing kaolin with water

Release time:2022-07-28 12:01:00  Number of views:

What is the effect of washing kaolin with water

Kaolin is mainly composed of Kaolinite cluster minerals (Kaolinite, dickite, perlite, halloysite, etc.) with a diameter of less than 2 microns, such as fine lamellar, tubular, laminated minerals. The aspiring chemical formula is AL2O3-2SiO2-2H2O. Its main mineral composition is Kaolinite and polyhydrate Kaolinite. In addition to Kaolinite cluster minerals, Montmorillonite, Illite, pyrophyllite, quartz, feldspar and other minerals are associated. The chemical composition of kaolin contains a lot of AL2O3, SiO2, and a small amount of Fe2O3, TiO2, as well as trace amounts of K2O, Na2O, CaO, and MgO.

The application fields of kaolin are different, and the quality requirements for it are vastly different. According to industrial use, it can be divided into kaolin used in the papermaking industry, enamel industry, rubber industry, and ceramic industry. In terms of chemical composition, the content of Al2O3 and SiQ2 of kaolin used in paper making, coating and refractory crucible is close to the theoretical value of Kaolinite; The filling agents for daily ceramics, building and sanitary ceramics, white cement raw materials, rubber, and plastics can appropriately lower the Al2O3 content of kaolin, and increase the SiQ2 content as appropriate. There are also different allowable levels for harmful components such as Fe2O3, TiO2, and SO3. The allowable values for the content of CaO, MgO, K2O, and Na2O vary among different uses.

Washed kaolin is the best raw material for producing high-grade porcelain; After deep processing and modification, the product can become an ambitious raw material for industrial sectors such as papermaking, rubber, paint, and coatings.


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