[China Aluminum Industry Network] Industrial alumina is obtained by chemically treating bauxite raw materials to remove oxides such as silicon, iron, and titanium. It is a highly pure alumina raw material, and its Al2O3 content is generally over 99%. The ore phase is composed of 40% to 76% of γ-Al2O3 and 24% to 60% of α-Al2O3. γ-Al2O3 can be converted to α-Al2O3 (corundum) at 950-1200°C, with significant volume shrinkage. OD Turning Pipe Cutting Machine Od Turning Pipe Cutting Machine,Pipe Od Turning Machine,Steel Pipe Od Turning Machine,Tube Od Turning Machine Shaoxing Sunfong Intelligent Equipment Inc. , https://www.zjsxsunfong.com