Processing of calcium carbonate minerals

Details Processing of calcium carbonate minerals Processing of calcium carbonate minerals

B - Operations, Transporting

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B04B 5/00 (2006.01) C01F 11/18 (2006.01) C09C 1/02 (2006.01) C09D 17/00 (2006.01) D21H 19/38 (2006.01) D21H 21/52 (2006.01)

Patent

CA 1091632

IMPROVEMENTS IN OR RELATING TO THE PROCESSING OF CALCIUM CARBONATE MINERAL ABSTRACT OF THE DISCLOSURE A stable, pumpable suspension of a calcium carbonate mineral is prepared by a method which includes the step of removing abrasive particles from a deflocculated, concentrated aqueous suspension of the calcium carbonate mineral by centrifuging the suspension at a solids content of at least 65% by weight under conditions such that the quantity of particles in said suspension having an equivalent spherical diameter larger than 10 µm is reduced. -1-

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