Hard rock ball mills, when handling heavy-duty coarse grinding of granite, basalt, and other materials, require liners with high impact and wear resistance. Suitable liners are typically made from the following materials:
High manganese steel:
ZGMn13 and ZGMn13Cr2: High-manganese steel contain approximately 13% manganese, exhibiting high toughness and work-hardening properties. Their surface hardness increases rapidly after impact. ZGMn13Cr2 is a modified high-manganese steel with the addition of Cr to enhance its hardening properties, making it more wear-resistant and suitable for coarse grinding chambers subject to high impact and frequent impact between the grinding media and the material. However, its hardening requires sufficient impact; its wear-resistant properties are limited when the impact is weak.
ZGMn17Cr2: An ultra-high manganese steel liner with an increased manganese content of approximately 17% and the addition of Cr. Compared to the ZGMn13 series, it work-hardens faster, achieves a higher surface hardness, and offers improved wear and impact resistance.
High-Chromium Cast Irons:
KmTBCr15Mo2: Its carbide hardness exceeds HV1200, offering strong wear resistance and suitable for combating granite and basalt wear. Mo content improves toughness and reduces the risk of impact fracture, but its overall toughness is lower than that of high-manganese steel. It is often used in conjunction with tougher materials or for coarse grinding applications with less severe impact.
KmTBCr26: Its higher chromium content results in a more abundant and denser distribution of carbides, resulting in wear resistance several times greater than that of high-manganese steel. However, increased chromium content can reduce toughness. It is often subjected to modification, inoculation, or composited with steel liners to reduce brittleness and extend service life.
Dual-Medium Quenched Medium-Alloy Steel: Through a scientific alloying ratio and dual-medium quenching process, this steel achieves a balance of hardness of HRC45-55 and impact toughness exceeding 25J. Its service life can be more than double that of high-manganese steel liners, its ability to stably maintain surface shape, and its ability to increase mill production by over 5%. It can flexibly adapt to diverse environments such as wet and dry grinding in mining. In addition, in terms of structural design, heavy-duty liners for rough grinding of hard rocks often use special forms such as concave-convex plates or wave-peak liners. With the help of the friction between the concave and convex, the crushing and grinding effect of hard materials can be enhanced.
Hard rock ball mills, when handling heavy-duty coarse grinding of granite, basalt, and other materials, require liners with high impact and wear resistance. Suitable liners are typically made from the following materials:
High manganese steel:
ZGMn13 and ZGMn13Cr2: High-manganese steel contain approximately 13% manganese, exhibiting high toughness and work-hardening properties. Their surface hardness increases rapidly after impact. ZGMn13Cr2 is a modified high-manganese steel with the addition of Cr to enhance its hardening properties, making it more wear-resistant and suitable for coarse grinding chambers subject to high impact and frequent impact between the grinding media and the material. However, its hardening requires sufficient impact; its wear-resistant properties are limited when the impact is weak.
ZGMn17Cr2: An ultra-high manganese steel liner with an increased manganese content of approximately 17% and the addition of Cr. Compared to the ZGMn13 series, it work-hardens faster, achieves a higher surface hardness, and offers improved wear and impact resistance.
High-Chromium Cast Irons:
KmTBCr15Mo2: Its carbide hardness exceeds HV1200, offering strong wear resistance and suitable for combating granite and basalt wear. Mo content improves toughness and reduces the risk of impact fracture, but its overall toughness is lower than that of high-manganese steel. It is often used in conjunction with tougher materials or for coarse grinding applications with less severe impact.
KmTBCr26: Its higher chromium content results in a more abundant and denser distribution of carbides, resulting in wear resistance several times greater than that of high-manganese steel. However, increased chromium content can reduce toughness. It is often subjected to modification, inoculation, or composited with steel liners to reduce brittleness and extend service life.
Dual-Medium Quenched Medium-Alloy Steel: Through a scientific alloying ratio and dual-medium quenching process, this steel achieves a balance of hardness of HRC45-55 and impact toughness exceeding 25J. Its service life can be more than double that of high-manganese steel liners, its ability to stably maintain surface shape, and its ability to increase mill production by over 5%. It can flexibly adapt to diverse environments such as wet and dry grinding in mining. In addition, in terms of structural design, heavy-duty liners for rough grinding of hard rocks often use special forms such as concave-convex plates or wave-peak liners. With the help of the friction between the concave and convex, the crushing and grinding effect of hard materials can be enhanced.
