Processing of calcium carbonate minerals
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United States of America Patent
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-
Feb 17, 1981
Grant Date -
N/A
app pub date -
Jul 24, 1978
filing date -
May 31, 1978
priority date (Note) -
Expired
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Abstract
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 .mu.m is reduced.
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