... Al2O3: 99.5% min 2.good at making refractory products 3.high purity, density 4. low micro ... is a kind of middle or high level refractory materials. With the eye-catching white color ... or high level iron runner casting material, gunning refractory and fabricate parts ect. It also can be ... .Usage: as the refractories materials used for refractory,abrasives,polishing,grinding,and petrol chemical industry,etc ...