what is gypsum used for in open pit mining

Calcium, Chemical Element Another calcium compound used by early civilizations was plaster of paris. Plaster of paris is made by heating gypsum, or calcium sulfate (CaSO 4 ), to remove the water that makes it crystallize. David Heys steam diesel photo collection philip hodgetts reflects on blyth's history part one - power station, hughes bolckow, north blyth shed, bates pit, c&c staith and west staith. gypsum mining loions in the world Florida State University's Research in Review. WHAT A WASTE! by KathleenFor years, Florida'sphosphate-mining companies have simply stacked the stuff up in piles,Gypsum, a common mineral    Read More

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