Product category
Foundry Bentonite
Bentonite is the binder of green sand systems. It is added to silica sand to give the mould strength and help prevent expansion and deformation during casting.
Main applications
- Grey and ductile iron casting
- Steel casting
- Non-ferrous casting
Product forms
- Milled powder
Packaging options
- 25 kg bags
- Big bags (jumbo bags)
- Bulk supply on request
Technical data & laboratory analysis
Technical specifications
Foundry bentonite produced from Çankırı bentonite is designed as a binder for green sand molding systems. It helps form bonds between sand grains, develop mould strength and control mould properties during production.
| Parameter | Target range |
|---|---|
| Moisture | 8–12% |
| pH (2% suspension) | 9.0–10.0 |
| Swelling index | 24–30 ml/2 g |
| Methylene blue value | 350–420 mg/g |
| Passing 200 mesh | Min. 85% |
| Montmorillonite | Target 75% and above |
| Gel formation | Fast / depends on test |
| Green compression strength | Depends on sand and test recipe |
| Wet tensile strength | Depends on sand and test recipe |
Typical target values – subject to laboratory confirmation.
Key features & applications
- Green sand molding
- Iron casting
- Steel casting
- Non-ferrous metal casting
- Automotive and machine part casting
- Foundry sand systems
Recommended laboratory tests
Moisture, swelling, methylene blue, pH, sieve analysis, gel formation, green compression strength, wet tensile strength and sand mixture performance tests.
Laboratory analysis scope
Physical analysis
Moisture, grain size, bulk density
Mineralogical analysis
Montmorillonite and other clay minerals
Chemical analysis
SiO₂, Al₂O₃, Fe₂O₃, CaO, MgO, Na₂O, K₂O
Performance analysis
Product-specific absorption, swelling, filtration, binding or strength
Test standards
ASTM, API, ISO and customer specification
Quality documents
COA, TDS and SDS
Quality documents
Technical Data Sheet
Available on request
Safety Data Sheet
Available on request