Product Information
Our foundry grade bentonite powder is manufactured from premium Askanian bentonite clay deposits in Georgia, specifically designed as a binding agent for sand-clay molds in the foundry industry. With decades of proven performance supplying major automotive and industrial manufacturers including AvtoVAZ, Kamaz, and GAZ, Askangel bentonite delivers consistent, high-quality results for ferrous and non-ferrous casting applications.
Manufacturing Process: Our advanced production process ensures optimal preservation of bentonite’s colloidal-chemical properties:
- Raw material preparation (stone separation, grinding)
- Two-stage drying in specialized equipment
- Precision grinding in roller-pendulum mills
- Dynamic separator classification
- Optional activation with sodium/magnesium salts or organic reagents for enhanced performance
Key Applications:
- Green sand casting for iron, steel, aluminum, and brass
- High-precision mold production for automotive components
- Industrial machinery casting
- Complex-shaped castings requiring superior dimensional accuracy
Benefits
- Superior Binding Strength – Creates robust, stable molds with excellent wet compressive strength (0.9-1.5 kgf/cm²) that withstand molten metal pouring without deformation
- Exceptional Thermal Stability – Low iron content (2.7-3.5%) ensures high thermal resistance, particularly critical for cast iron production with carbon additives
- Excellent Moisture Retention – Maintains optimal plasticity and workability of molding sand, enabling intricate mold shapes and easy compaction
- High Reusability – Sand mixture can be recycled multiple times, reducing material costs and waste while maintaining consistent quality
- Reduced Casting Defects – Minimizes surface defects including metal penetration, scabbing, veining, porosity, and hot tears for superior casting quality
- Proven Industrial Performance – Decades of successful use in major USSR automobile plants and European foundries demonstrates reliability at scale
Specifications
| Parameter | Value |
|---|---|
| Product composition | Natural bentonite (montmorillonite clay) from Askan deposit |
| Moisture content | 8-12% |
| Montmorillonite content | 85-95% |
| Colloidal content | 25-100% |
| Water absorption | 2.8-9.0 units |
| Methylene blue adsorption (MBA) | 300-410 mg.eq/100g |
| Iron oxide (Fe₂O₃) content | 2.7-3.5% |
| Sulfur content (SO₃) | 0.1-0.2% |
| Carbonate content | 1-3% |
| pH of suspension | 9.5-10.5 |
| Sieve residue 0.4mm | 0.0% |
| Sieve residue 0.16mm | 0.0-2.0% |
| Sieve residue 0.063mm | 10-25% |
| Cation exchange capacity | 95-105 mg.eq/100g |
Molding Mixture Properties
| Property | GOST 28177-89 | VDG P-69 |
|---|---|---|
| Wet compressive strength | 0.9-1.5 kgf/cm² | 7-11 N/cm² |
| Tensile strength at break | 0.020-0.040 kgf/cm² | 0.20-0.40 N/cm² |
| Thermal stability | 0.3-1.0 | – |
Standards Compliance
- Interstate Standard GOST 28177-89 “Bentonite molding clay. General technical conditions”
- VDG P-69 Methodology (German Foundry Society)
- Georgian Enterprise Standard STP GR 22983003-001-2017
- Custom specifications available upon request
Packaging Options
- Big-Bag containers: 1,000 kg or 1,250 kg
- Polypropylene bags: 25 kg or 40 kg
- Bulk delivery: rail cars, sea containers, tank trucks
Documentation
Technical Documentation Available:
- ✓ Technical Data Sheet (TDS)
- ✓ Safety Data Sheet (SDS/MSDS)
- ✓ Certificate of Analysis (COA)
- ✓ Quality Certificates
TDS, SDS, certificates available upon request.
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