Description
Brown bentonite, typically calcium based, is a versatile binding and sealing material used across foundry, drilling, aquaculture, and agriculture.
What it is
A calcium-based bentonite clay valued for its binding strength and swelling properties under heat and moisture.
Key applications
- Foundry: the primary use. Binds molding sand together and holds under the heat of casting.
- Drilling: an oil and water well drilling mud additive, controlling viscosity and wall cake formation.
- Aquaculture: seals pond bottoms using the same swelling property that makes it effective in foundry sand.
- Agriculture: used as a binding agent in granule formation.
Why foundries choose brown bentonite
Binding strength and heat resistance under casting conditions are the two properties that matter most for foundry buyers. If you’re sourcing for foundry use specifically, these are the numbers worth asking about first.
FAQ
What makes brown bentonite different from white bentonite?
White bentonite grades are selected for purity and are used in ceramic, industrial, and pharmaceutical applications. Brown bentonite is selected for binding strength and heat resistance, making it the standard choice for foundry and drilling work rather than purity-driven applications.
Related products
Foundry buyers sourcing Brown Bentonite often also need Quartz Powder for mold and core material.
