1. Grinding medium materials and properties: High chromium white cast iron (HCCI) balls have excellent wear resistance and corrosion resistance due to their high chromium (12% -30%) and carbon (1.8% -4%) content, making them suitable for mineral processing, coal and cement industries. Their wear resistance is superior to martensitic steel and cast forged steel.
2. The influence of grinding medium size on mill performance: Different sizes of grinding medium have a significant impact on grinding performance. Larger balls are suitable for crushing coarse-grained ores (impact effect), smaller balls are suitable for grinding fine-grained ores (grinding effect), mixed size balls (such as 10 mm, 20 mm, and 50 mm) are more effective for coarse-grained feeding, and binary mixed balls of 10 mm and 20 mm are more effective for fine-grained feeding.
3. Application of High Pressure Roller Grinding Machine (HPGR): HPGR technology has been widely used in mineral processing (such as gold, copper, iron ore, etc.) due to its energy efficiency (35% lower energy consumption than traditional grinding equipment), low maintenance requirements, and high availability. It can replace traditional crushing/grinding circuits, reduce energy consumption, grinding medium consumption, and wear costs.
In summary, high wear-resistant grinding media (such as high chromium cast iron balls) and high-efficiency energy-saving equipment (such as HPGR) perform well in mineral processing, significantly improving grinding efficiency and reducing energy consumption