Method for removing mineral slimes from kaolin clay

摘要

The invention is directed to a method for reducing the viscosity and increasing the brightness of a kaolin clay by removal of mineral slimes having a particle size of less than about 0.2 micron. The process includes reflocculating an aqueous clay slurry by the addition of an overdose of dispersing agent. The reflocculated slurry is aged and dewatered by fractionation.