Analysis on the process adaptability of ball mill processing white corundum

White corundum, a high-hardness abrasive (Mohs hardness 9.0), requires a balanced approach to sand production, balancing efficiency and particle size control. Ball mills offer unique advantages in ultrafine grinding, but their application in white corundum processing requires a comprehensive assessment of material properties.

I. Technical Advantages of Ball Mills

Ultrafine Particle Processing Capability

By the impact and friction of grinding media (steel/ceramic balls), ball mills can achieve particle size control of 0.5-20μm, meeting the high-precision requirements of white corundum micropowders (e.g., W10-W40). Their closed-circuit system reduces over-grinding and improves yield.

Process Flexibility

Both dry and wet methods are supported. The wet method reduces dust pollution during white corundum processing while avoiding particle agglomeration associated with dry methods.

II. Compatibility Challenges

Energy Consumption and Wear Issues

The high hardness of white corundum (second only to diamond) increases wear on the grinding media and liners, increasing steel consumption costs. In actual production, high-chromium alloy liners or zirconia ceramic balls are required to extend their life. Raw Material Pretreatment Requirements

White corundum blocks must be coarsely crushed to ≤5mm by a jaw crusher before entering the ball mill. Otherwise, the feed port may clog and reduce efficiency.

III. Recommended Application Scenarios

Fine Powder Preparation

Ball mills are more suitable for producing white corundum fine powder (e.g., W5 or less for polishing), and their particle size distribution is more uniform than traditional roller mills.

Combined Process

A combined process of "jaw crusher + ball mill + air classifier" is recommended to balance production capacity and energy consumption. For example, after coarse crushing, ball milling can be performed to a D50 of 5μm, followed by a classifier to remove coarse particles.

Conclusion

Ball mills are suitable for producing high-value-added fine powders in white corundum sand production, but optimization of the media material and process flow is necessary to control costs. For conventional abrasive materials (e.g., 24#-60#), double-roll crushers remain a more economical choice.