Process for producing pelletized pigmentary materials

摘要

A process for making densified pellets of pigmentary materials such as kaolin clay and talc of high bulk density, good handling and bulk flow properties, and low moisture content is disclosed. The process consists essentially of mixing substantially dry pigmentary material with water to bring the total moisture content of the finely divided pigmentary material to from about 17% to about 26% by weight based on the weight of said dry pigmentary material during mixing in a pin mixer, followed by screening, and subsequent pelletization in a roller while drying. The pellets are dryed to 1% or less moisture content by weight based on the weight of dry pigmentary material.