Bentonite clay—composed mainly of montmorillonite—is a versatile, absorbent natural clay known for its high swelling capacity, thixotropic gel formation, and binding strength.

Key Industrial Uses

* Oil and Gas Drilling: Used extensively in drilling muds to cool and lubricate drill bits, stabilize borehole walls, and extract rock cuttings to the surface.

* Foundry and Metal Casting: Acts as a vital bonding agent (green sand binder) in molding sands for shaping iron, steel, and other metal castings.

* Iron Ore Pelletizing: Functions as a metallurgical pellet binder to agglomerate fine iron ore concentrate into strong pellets for steelmaking furnaces.

* Construction and Civil Engineering: Utilized for soil stabilization, waterproofing, slurry walls, tunneling, diaphragm walls, and geosynthetic clay liners (GCLs) to prevent water seepage.

* Environmental Sealing and Landfills: Serves as an impermeable barrier or liner in waste containment sites, sewage treatment, and toxic waste pits to protect groundwater.

* Paper and Pulp Industry: Used as a retention and drainage aid, as well as for pitch control to absorb sticky resinous impurities.

* Paints, Coatings, and Ceramics: Acts as a thixotropic thickener, suspending agent, and plasticizer in paints, adhesives, inks, and ceramic bodies.

* Oil and Beverage Clarification: Employed as a purifying or bleaching earth to filter and clarify vegetable oils, mineral oils, wine, beer, and fruit juices.

* Agriculture and Consumer Products: Functions as an inert carrier for pesticides and fertilizers, a livestock feed additive, and the primary absorbent base in pet products like cat litter.