Bentonite is a kind of clay coals which takes Montmorillonite as the main content. It has , Water absorption, swelling, cation exchange, antennae, adsorption, thickening, lubricity, bleaching of and so on. It can be used as Iron ore pelletizing, drilling mud, foundry sand binder, bleaching animal and vegetable oils, cleaning agents, rubber, plastic packing, desiccant, adsorbent, detergents, mineral feed additives