PRODUCTION OF AQUEOUS CALCIUM CARBONATE SUSPENSIONS

摘要

IMPROVEMENTS IN OR RELATING TO THE PRODUCTION OF AQUEOUS CALCIUM CARBONATE SUSPENSIONS A method of producing an easily pumpable aqueous suspension of a natural calcium carbonate material containing at least 60% by weight of particles smaller than 2 microns equivalent spherical diameter comprises forming an aqueous suspension of said natural calcium carbonate material and a minor amount of a compound which contains-calcium ions or carbonate ions and has a solubility in water of at least 0.05 g per 100 ml of water at 25.degree.C; and thereafter deflocculating the natural calcium carbonate material in said aqueous suspension with a dispersing agent.