Aluminum oxide attrition as a result of its aluminum oxide high content, high density, high degree of hardness, high resistance to wear by widespread utilization in different type ceramics, porcelain glaze, glass and chemical factory thick hard material quality correct grinding and division. Divides into according to the aluminum content: 60-70%, 65-75%, 92%, 95% presses the specification minute: φ25mm-φ75mm