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Discharge End Liners
Discharge End Liners By Qiming Casting
Qiming Casting is a professional manufacturer of ball mill liners, with the ability to produce high manganese steel and chromium-molybdenum alloy steel discharge end liners according to customer-provided drawings. Our production process is based on the latest technology and strict quality control standards, ensuring that our products meet the highest standards of performance and durability in the industry.
Manganese Steel
High manganese steel (Mn14) is a commonly used material for ball mill liners due to its excellent toughness and work-hardening properties. It is particularly effective in applications where impact resistance is a key requirement. Qiming Casting’s high manganese steel liners are designed to withstand the high impact forces generated by the grinding media and material inside the ball mill, significantly reducing wear and extending the service life of the liners.
Spec Available
| Name | Chemical Elements（%） | |||||||
| C | Si | Mn | Cr | Mo | Cu | P | S | |
| High Manganese Liner MN14 | 0.9-1.5 | 0.3-1.0 | 11-14 | 0-2.5 | 0-0.5 | ≤0.05 | ≤0.06 | ≤0.06 |
| Super-high Manganese Liner Mn18Cr2 | 1.0–1.5 | 0.3-1.0 | 16-19 | 0-2.5 | 0-0.5 | ≤0.05 | ≤0.06 | ≤0.06 |
Physical Property & Microstructure
| Name | Surface（HRC） | Ak（J/cm2） | Microstructure |
| High Manganese Liner Mn14 | ≤240 | ≥100 | A+C |
| Super-high Manganese Liner Mn18Cr2 | ≤260 | ≥150 | A+C |
| Carbide Austenite | |||
Specification
| Size | Hole Dia.（mm） | Liner Length（mm） | ||
| ≤40 | ≥40 | ≤250 | ≥250 | |
| Tolerance | +2 0 | +3 0 | +2 | +3 |
Chromium-molybdenum Alloy Steel
Chromium-molybdenum alloy steel, on the other hand, offers a combination of high strength and toughness, making it ideal for applications where both wear resistance and impact resistance are needed. Qiming Casting’s chromium-molybdenum alloy steel liners are heat-treated to optimize their mechanical properties, providing superior performance in demanding grinding environments.
Spec Available
| Name | Chemical Elements（%） | |||||||
| C | Si | Mn | Cr | Mo | Cu | P | S | |
| High Chrome Alloyed Liner | 2.0–3.6 | 0-1.2 | 0-2.0 | 8-26 | ≤3.0 | ≤1.2 | ≤0.06 | ≤0.06 |
| Middle Chrome Alloyed Liner | 2.0–3.3 | 0-1.2 | 0-2.0 | 3–8 | ≤3.0 | ≤1.2 | ≤0.06 | ≤0.06 |
| Low Chrome Alloyed Liner | 2.1–3.6 | 0-1.5 | 0-2.0 | 1–3 | 0-1.0 | ≤1.2 | ≤0.06 | ≤0.06 |
Physical Property & Microstructure
| Name | Surface（HRC） | Ak（J/cm2） | Microstructure |
| High Chrome Alloyed Liner | ≥58 | ≥3.5 | M+C+A |
| Middle Chrome Alloyed Liner | ≥48 | ≥10 | M+C |
| Low Chrome AlloyedLiner | ≥45 | ≥15 | M+C+P |
| Martensite Carbide Austenite Pearlite | |||
Specification
| Size | Hole Dia.（mm） | Liner Length（mm） | ||
| ≤40 | ≥40 | ≤250 | ≥250 | |
| Tolerance | +2 0 | +3 0 | +2 | +3 |
Our production process begins with the careful selection of raw materials, followed by melting and casting using advanced induction furnaces. The castings are then heat-treated to achieve the desired microstructure and properties, and finished with precise machining to ensure a perfect fit with the customer’s ball mill. Quality control checks are performed at every stage of production to ensure that our liners meet the highest standards of quality and performance.
Qiming Casting’s ball mill liners are widely used in the mining, cement, power generation, and other industries where grinding operations are critical. Our commitment to quality, service, and innovation has made us a trusted supplier to customers around the world. Contact us today to discuss your specific requirements and receive a quote for your next ball mill liner project.