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Kaolin Crushing and Grinding System,Machines for Sale

Kaolin(also called Kaolinite) is is a clay mineral, part of the group of industrial minerals, with the chemical composition Al2Si2O5(OH)4. It is a layered silicate mineral, with one tetrahedral sheet linked through oxygen atoms to one octahedral sheet of alumina octahedra.[4] Rocks that are rich in kaolinite are known as kaolin or china clay. --wikipedia.

Kaolin is used in a variety of industries, including paper manufacture, ceramics, and paint formula­ tions. Papermaking uses a large amount of kaolin clay, and crude kaolin is not useful as a mined product until it is processed to remove impurities.

In Georgia, kaolin deposits are normally lo­ cated and mapped from exploratory cores to depths typically from a few tens to about 200 feet. During mining, the overburden is stripped from one to a few acres to expose the kaolin layer. No water is used in actual drilling, but up to 1,000 gallons per core may be used in explo­ ration and mine development.

Relatively large volumes of water are used at kaolin processing plants, which are usually lo­ cated some distance from the mining area. Mined kaolin is usually slurried near the mine and transported to processing facilities through a pipeline as a clay suspension dispersed in water. Although processing methods vary with the run-of-mine clay quality and the end use for the processed clay, they usually include suspension or dispersion (deflocculation), screening, grit removal (e.g., gravity separa­ tion, centrifugation), flotation, brightening (e.g., magnetic separation, oxidation), floccu­ lation, filtration, drying, and packaging.

Water usage varies with the specific operations needed to refine the clay for its end use, but a nominal estimate from one source indicates typical usage is ~2,000 gallons per ton of fin­ ished product. Approximately 80 percent of the finished kaolin shipped to the paper industry is in slurry form, which is 70 percent kaolin and 30 percent water.

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