METHOD OF PRODUCING KAOLIN CLAY FROM ORE HAVING SILICA SAND CONTENT

摘要

Kaolin clay is produced from ore having silica sand content in quantities that inhibit air separation of the silica sand from the kaolin clay by subjecting a slurry of the ore to agitation so that the silica sand acts to reduce or smear the kaolin clay to substantially natural particle size. This slurry is then subjected to rotation so that the heavier silica sand drops from the ore slurry and may be separated from the kaolin clay and then the kaolin clay slurry is thickened to remove some of the water content therefrom and thereafter sprayed into a heated atmosphere not in excess of approximately 1,100 DEG F. to dry the kaolin clay particles.