SAG Mill Grinding Balls
Our Advantages
- High Impact Resistance & Strong Adaptability: Developed specifically for extreme SAG mill conditions, withstanding high-intensity impacts with stable operation and no disjointing.
- Low Consumption, Long Life & Reduced Downtime: Excellent wear resistance and low failure rates significantly extend service life and reduce losses from equipment downtime.
- Precise Customization: Supports personalized customization of diameter and alloy composition, precisely matching customer ore hardness to improve grinding efficiency.
- Full Process Batch Traceability: Each batch is equipped with a unique identifier and exclusive inspection report, providing a basis for quality traceability and peace of mind in cooperation.
1.SAG Mill Grinding Balls—The Core Grinding Weapon for Mine Processing
The Semi-Autogenous Grinding (SAG) mill is the core key equipment in mine beneficiation plants, placing extremely high demands on the impact toughness and wear resistance of grinding media. Addressing this rigorous demand, Chengda customized and launched SAG mill special steel balls, offering two core process options: High Toughness Alloy Steel Forging Process and Unique CADI (Carbidic Austempered Ductile Iron) Casting + Forging Process, both precision-made. The products combine excellent impact resistance, low breakage rates, and stable wear resistance, perfectly adapting to high-intensity mill operation scenarios. They are widely used in copper, gold, iron, and non-ferrous metal mining operations.
2.Primary Types of Grinding Balls for SAG Mills
3.Product Specification
| Parameter | High Chrome Cast Ball | CADI Ball | Forged Steel Ball |
|---|---|---|---|
| Diameter Range | 4.6 mm – 140 mm | 4.6 mm – 140 mm | 4.6 mm – 140 mm |
| Material Type | Chrome Alloy Cast Steel | Carbide-containing Ductile Iron | Alloy Forged Steel (C45, 60Mn, 65Mn, B2, B3) |
| Chemical Composition (Typical) |
C: 2.0–3.2% Si:≤1.0% Mn:0.3-1.5% Cr: 10-28% P:≤0.06 S: ≤0.06% |
C：3.3–3.9% Si:2.4-3.0% Mn:1.4-1.9% Cr：0.2–0.5% P：≤0.05% S：≤0.05% |
C: 0.42–1.03% Cr: 0.25–1.2% Mn: 0.5–1.1% Si: 0.17–1.9% P：≤0.035% S：≤0.035% |
| Hardness (HRC) | ≥60 | ≥55(Increases to 60+ after 48h use） | ≥60 |
| Impact Toughness | ≥5.5 J/cm² | ≥15 J/cm²（Custom formula, high energy impact strength, exclusive formula for extreme conditions） | ≥12 J/cm²（Typical value for regular material 14–18 J/cm²; High-end materials like B2/B3 can reach 23–30 J/cm²） |
| Breakage Rate | ≤0.5% | ≤0.5% | ≤0.5% |
| Operating Environment | （Medium impact mixed ore environment） | （Extreme impact SAG environment; adapts to heavy-load conditions requiring both high toughness and wear resistance） | （High impact force, high energy SAG mills） |
| Application Industries | Iron ore, non-ferrous metals, cement raw material plants | Large mining operations using SAG + Ball Mill combined circuits | Copper, Gold, Iron, Nickel mines |
4.Production Process & Flow
Forged balls: Heat the steel billet → High-pressure forging into balls → Precision heat treatment → Uniform hardness distribution
Cast balls : Patented alloy formula → Metal mold casting → Self-hardening & heat treatment → High-toughness martensitic structure
