1. Price difference is also the most concerned issue for customers. White corundum is more expensive.
2. The process is different. White corundum is made of high-quality alumina powder, which is refined and crystallized by electric melting. High purity, good self-sharpening, acid and alkali corrosion resistance, high temperature resistance and stable thermal performance. Its hardness is slightly higher than that of brown corundum, with slightly lower toughness, high purity, good self-sharpening, strong grinding ability, low calorific value, high efficiency, acid and alkali corrosion resistance, high temperature resistance and good thermal stability.
Brown corundum is formed by melting high-quality bauxite, iron filings and anthracite at high temperature in electric arc. It is crushed and shaped by a autogenous mill, and iron is removed by magnetic separation and screened into various particle sizes. The main chemical composition is AL2O3 with a content of 94%-96%, and a small amount of iron, silicon and titanium.