Saturday, March 23, 2013
In the mineral processing industry, rubber linings are widely used in the second-stage fine grinding process. Compared to high-manganese steel linings, they offer significantly longer service life—often at least twice as long. This makes them a more cost-effective and durable option for many applications. The performance and longevity of rubber linings depend not only on installation methods but also on proper usage conditions and appropriate structural design. Choosing the right formulation and structure is essential for maximizing their effectiveness. First, different environments require tailored rubber formulas. For example, wear resistance, impact resistance, acid and alkali resistance, oil resistance, heat resistance, and other properties should be considered based on the specific application. Second, the structural design of the rubber lining must match the operating conditions. Common shapes include F, B, K, S, Y types, among others. The available specifications range from 100 to 210 series, with thicknesses varying between 30mm to 100mm, allowing flexibility in selection. Third, during the grinding process, rubber linings face challenges such as impact from grinding media, cutting, puncturing, and abrasion from the material. Therefore, they need to have excellent impact resistance, tear resistance, corrosion resistance, and wear resistance to ensure long-term durability. Fourth, rubber linings are widely adopted globally, especially in situations where the ore particle size is small, leading to higher grinding efficiency, less lining wear, and lower steel ball consumption. In smelters and gold concentrators, for instance, the service life often exceeds three years, making it a highly effective solution. Fifth, in certain sections of grinding (crushing-grinding), particularly in non-ferrous and black metal mines, where the ore size is ≤10–15 mm and hardness ranges from 8–10, with ball diameters of ∮100 and ∮80, impact-resistant linings are required. These are typically used in autogenous mills and rod mills. While their service life is about 1–1.5 times that of manganese steel, using rubber linings on the mill’s inlet and outlet ends yields excellent results, effectively replacing manganese steel liners. Sixth, currently, rubber linings are mainly used in wet grinding. However, in recent years, our factory has successfully applied them in dry grinding scenarios, such as coal mills in power plants and grinding machines in carbon plants, where temperatures remain below 80°C. Extensive experiments have been conducted, and the results have been very promising. Seventh, when determining the rotational speed of the mill, it is generally recommended to operate between 75% and 80% of the critical speed. Additionally, the ore size should not be too large, and steel balls should be graded according to several specifications to achieve optimal economic benefits. Eighth, for large-scale mills with larger ore sizes and grinding media, if the critical rotational speed exceeds 80%, a "composite liner" may be more suitable. This approach offers better performance and adaptability in such demanding conditions.
In the mineral processing industry, rubber linings are widely used in the second-stage fine grinding process. Compared to high-manganese steel linings, they offer significantly longer service life—often at least twice as long. This makes them a more cost-effective and durable option for many applications. The performance and longevity of rubber linings depend not only on installation methods but also on proper usage conditions and appropriate structural design. Choosing the right formulation and structure is essential for maximizing their effectiveness. First, different environments require tailored rubber formulas. For example, wear resistance, impact resistance, acid and alkali resistance, oil resistance, heat resistance, and other properties should be considered based on the specific application. Second, the structural design of the rubber lining must match the operating conditions. Common shapes include F, B, K, S, Y types, among others. The available specifications range from 100 to 210 series, with thicknesses varying between 30mm to 100mm, allowing flexibility in selection. Third, during the grinding process, rubber linings face challenges such as impact from grinding media, cutting, puncturing, and abrasion from the material. Therefore, they need to have excellent impact resistance, tear resistance, corrosion resistance, and wear resistance to ensure long-term durability. Fourth, rubber linings are widely adopted globally, especially in situations where the ore particle size is small, leading to higher grinding efficiency, less lining wear, and lower steel ball consumption. In smelters and gold concentrators, for instance, the service life often exceeds three years, making it a highly effective solution. Fifth, in certain sections of grinding (crushing-grinding), particularly in non-ferrous and black metal mines, where the ore size is ≤10–15 mm and hardness ranges from 8–10, with ball diameters of ∮100 and ∮80, impact-resistant linings are required. These are typically used in autogenous mills and rod mills. While their service life is about 1–1.5 times that of manganese steel, using rubber linings on the mill’s inlet and outlet ends yields excellent results, effectively replacing manganese steel liners. Sixth, currently, rubber linings are mainly used in wet grinding. However, in recent years, our factory has successfully applied them in dry grinding scenarios, such as coal mills in power plants and grinding machines in carbon plants, where temperatures remain below 80°C. Extensive experiments have been conducted, and the results have been very promising. Seventh, when determining the rotational speed of the mill, it is generally recommended to operate between 75% and 80% of the critical speed. Additionally, the ore size should not be too large, and steel balls should be graded according to several specifications to achieve optimal economic benefits. Eighth, for large-scale mills with larger ore sizes and grinding media, if the critical rotational speed exceeds 80%, a "composite liner" may be more suitable. This approach offers better performance and adaptability in such demanding conditions.
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