A ball mill trunnion is a critical component in mining and mineral processing equipment, serving as the entry and exit point for material flow and supporting the mill’s rotating drum. Here’s a detailed overview to help you source or understand trunnions for ball mills:
Key Features of Ball Mill Trunnions
1. Function:
– Supports the mill’s rotating cylinder.
– Connects to feed and discharge systems (e.g., chutes, liners).
– Bears the weight of the mill and grinding media.
2. Materials & Durability:
– Typically made from high-strength cast steel or forged steel (e.g., ASTM A148, DIN 1.0619).
– Hardened or lined with wear-resistant materials (rubber, polyurethane, or metal alloys) to withstand abrasion.
3. Design Considerations:
– Hollow or solid construction, depending on mill size.
– Precision-machined surfaces for smooth rotation and sealing.
– Flanges for bolting to the mill shell.
4. Common Issues:
– Wear from slurry/grinding media.
– Cracking due to stress or improper alignment.
– Seal failures leading to leaks.
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Leading Mining Suppliers of Ball Mill Trunnions
| Supplier | Key Offerings | Regions Served |
|———-|————–|—————-|
| Metso Outotec | Custom trunnions, replacement parts | Global |
| FLSmidth | Engineered trunnions with wear solutions | Worldwide |
| ThyssenKrupp Polysius | Heavy-duty forged trunnions | Europe, Americas |
| CITIC Heavy Industries | Large-scale trunnions for SAG/ball mills | Asia, Africa |
| Bradken (Now part of Hitachi) | High-performance alloy trunnions | Global |
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Procurement Tips
1. Compatibility: Ensure dimensions match your mill’s OEM specs (e.g., diameter, bolt patterns).
2. Certifications: Look for ISO 9001, ASTM, or ASME compliance.
3. After-Sales Support: Choose suppliers offering installation guidance and maintenance services.
4. Customization: Some suppliers provide tailored solutions (e.g., integrated lubrication systems).
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Replacement & Maintenance
- Regularly inspect for cracks, wear, or misalignment.
- Use laser alignment tools during installation to prevent premature failure.
- Consider upgrading to composite liners for extended lifespan.
Would you like assistance with specific supplier quotes or technical drawings? Let me know your mill model/size!
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