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Help CenterADI/CADI Austempered Ductile Iron Grinding Balls Work Hardening 60-63HRC 5-10% Energy Saving For SAG Mills
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ADI/CADI Austempered Ductile Iron Grinding Balls – Advanced Energy Saving Technology for SAG Mills
Product Description
Ningguo Huafeng is proud to supply ADI (Austempered Ductile Iron) and CADI (Carbidic Austempered Ductile Iron) grinding balls – the advanced grinding media solution for large SAG mills and high-impact mining applications. CADI is produced by subjecting carbide-containing ductile iron to a specialized austempering heat treatment, resulting in an ausferrite matrix with uniformly distributed carbides and spheroidal graphite. This unique microstructure delivers an optimal balance of high hardness, exceptional toughness, and unique work-hardening capability.
What is CADI?
CADI (Carbidic Austempered Ductile Iron) is an advanced material that combines the impact toughness of ductile iron with the wear resistance of white cast iron. Through specialized austempering heat treatment, it achieves a microstructure of Ausferrite + Acicular Ferrite + Spheroidal Graphite + Carbide – delivering performance unmatched by conventional grinding media.
Key Technical Parameters
- Diameter: φ60mm – φ150mm
- Initial Hardness: 50 – 58 HRC (as supplied)
- In-Use Surface Hardness: 60 – 63 HRC (work hardening)
- Impact Toughness: 8 – 20 J/cm²
- Breakage Rate: ≤1%
- Density: 7.3 g/cm³ (8% lighter)
- Microstructure: Ausferrite + Acicular Ferrite + Spheroidal Graphite + Carbide
- Heat Treatment: Austempering (water-air alternate)
Performance Comparison
| Property | CADI Ball | High Chrome Ball | Forged Ball | |----------|-----------|------------------|-------------| | Initial Hardness (HRC) | 50-58 | 58-62 | 55-62 | | In-Use Hardness (HRC) | 60-63 | 58-62 | 55-62 | | Impact Toughness (J/cm²) | 8-20 | 3-5 | ≥12 | | Breakage Rate (%) | ≤1 | ≤1 | ≤1 | | Density (g/cm³) | 7.3 | 7.8 | 7.8 | | Power vs Baseline | -5%~-10% | Baseline | +5% |
Key Advantages
- Work hardening: Surface hardness increases from 50-58 HRC to 60-63 HRC under impact – the more you run your mill, the harder these balls become
- Energy saving: 8% lighter density reduces mill load, saving 5%-10% power vs high chrome and >10% vs forged balls
- High impact toughness: 8-20 J/cm² withstands high-energy SAG mill impacts
- Low breakage: ≤1% breakage rate – no spalling, no crushing
- High-Tech certified: Recognized as a High-Tech Product for innovation and energy conservation
Ideal Applications for CADI Balls
- Large-scale mining: Iron ore, copper ore, gold ore, nickel ore
- Semi-autogenous mills (SAG mills) – diameter 5-12 meters
- High-impact grinding environments
- Operations focused on energy cost reduction
Ready to Reduce Your Grinding Costs?
Contact us with your SAG mill parameters (diameter, speed, ore type, current ball consumption). Our technical team will provide a CADI trial proposal with performance guarantee.
Contact us today – ask for our CADI technical datasheet and case studies.
Send Inquiry to This Supplier
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