1. Introduction to Large Ball Mill ZGMN13CR2 Liners
Ball mill liners are key components that protect the shell from direct impact and friction by steel balls and materials, while enhancing the grinding effect by adjusting the motion state of the grinding media, directly affecting the grinding efficiency and output of the mill.
The large ball mill ZGMn13Cr2 liner is an upgraded high manganese steel product optimized for medium to high impact conditions.
Performance Indicators |
Standard Mn13 Liners |
ZGMn13Cr2 Liners |
Improvement Effects |
Initial Hardness |
HB180-220 |
HB230-280 |
Early wear resistance increased by 30% |
Hardened Hardness |
HB500-550 |
HB550-600 |
Wear life increased by 20-40% |
Impact Toughness |
≥150J |
≥140J |
Meets ball mill anti-crack requirements |
Corrosion Resistance |
Poor (easily corroded at pH<6) |
Significantly improved (Cr passivation film) |
Wet slurry service life increased by 25% |
Applicable Ball Mill Diameter |
≤4m |
≤6m |
Breakthrough in Large Size |
Wear Resistance: After water toughening treatment, a single-phase austenitic structure is formed, which undergoes work hardening under impact load, significantly improving surface hardness, suitable for high-stress wear scenarios.
Toughness: Good impact toughness can withstand vibrations and impact loads during ball mill operation, preventing liner fractures.
Process Compatibility: Supports casting production, can be made into complex-shaped liners through sand casting, shell molding casting, etc., and can be customized in size.
2. Production Process and Performance Optimization Technology
Core Process Steps
Casting Process: Uses sand casting or lost foam casting, capable of producing large liners with uneven thickness; attention must be paid to controlling casting defects (such as shrinkage cavities, cracks).
Heat Treatment Control
Water Toughening Treatment: Heated to 1050-1100°C and held, then rapidly water quenched to suppress carbide precipitation, obtaining a single-phase austenitic structure, improving toughness and wear resistance.
Aging Treatment: After water toughening, aging at 380-620°C can further optimize the balance between hardness and toughness.
Innovative Liner Structural Design
Design Elements |
Traditional Structure |
ZGMn13Cr2 Optimization Scheme |
Benefits |
Raising Bar Shape |
Rectangular |
Wavy Surface Type |
Optimized steel ball falling trajectory, energy consumption reduced by 8% |
Bolt Hole Design |
Straight Through Hole |
Tapered Locking Hole + Rubber Seal |
Prevents slurry erosion, bolt life increased 2 times |
Thickness Gradient |
Uniform Thickness |
Tooth top thickened to 120% |
Service life matched to key wear areas |
Modularization |
Integral Type |
Fan-shaped Segments (≤30°) |
Single piece replacement, downtime reduced by 70% |
3. Application Scenarios and Selection Recommendations
ZGMn13Cr2 liners are mainly used for inner wall protection of large ball mills, specifically suitable for:
Mining industry iron ore and gold ore ball mills
Building materials industry cement clinker ball mills
Metallurgical industry steel slag processing ball mills
Selection and Usage Notes
Specification Customization: Customize liner size according to ball mill model (e.g., Φ3.2×13m, Φ4.6×15m), thickness usually 50-150mm.
Installation Requirements: Installed by bolt fixing or welding, thermal expansion gaps must be reserved to avoid deformation caused by temperature rise.
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Large ball mill ZGMN13CR2 liner
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