Talc deposits are mined from the earth and trucked over to plants for processing. It is then crushed and screened, then returned to the crusher for another round of crushing. Next, roller mills grind the talc to different levels, including coarse, coarse-plus-fine, and fine. The coarse and coarse-plus-fine grinds are ready to be used in products at this point, while the fine grind may be put through additional processing. Depending on where talc is mined, it may contain organic impurities which must be calcined. The calcination process involves heating and then cooling the talc, which can then be processed further or stored/shipped for use.
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