The effects of mechanical treatment, by wet or dry grinding, on layer silicates and clay minerals have been extensively studied , of water molecules on the size of pyrophyllite and kaolinite particl On the , At the first stages of grinding (Fig.
kaolin, ball clay, fire clay, bentonite, fuller's earth, and common clay and shale , such as crushing, grinding, and screening, that do not appreciably alter the chemical , clay and shale are dried to reduce the moisture content to desired levels.