(1) better wear resistance.

Chaowei emery hardness in 7.5-8.0, edges and corners, collected from deep ore, not affected by weathering, not easy powder. Join the emery floor with high grade cement and use about 4 - 5kg. per square meter

(2) better acid base tolerance and high temperature resistance

The solubility of Chaowei natural corundum in acid and alkali is only 1%, is the silicate structure stable, even at pH also has good stability, it is because of him this character, he can be used as filter material industrial acid sewage and wastewater. Moreover, the melting point of natural corundum is 1400 degrees centigrade, and it has good properties even at high temperature.