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method of mining gypum

How to Extract Sulfur From Gypsum | eHow

2014-2-12 · How to Extract Sulfur From Gypsum. Gypsum is a naturally occurring form of calcium sulfate, CaSO?·2H?O. It is used in the building trade for gypsum board ...

USG Corporation - Wikipedia, the free encyclopedia

USG Corporation, also known as United States Gypsum Corporation, manufactures construction materials, most notably drywall and joint compound. Its corporate offices ...

Gypsum - Wikipedia, the free encyclopedia

Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O.[3] It can be used as a fertilizer, is the main ...

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