致密刚玉是采用高纯氧化铝粉和还原剂按一定配比在电弧炉内经高温熔融后冷却而成的，颜色为浅灰色，具有良好的抗酸碱性能、较高的熔点、相当高的体积密度及其非常低的气孔率、在高温下具有优良的耐磨性、抗渣性、体积稳定性和抗热震性能，广泛用于钢铁冶金,石油化工,建材陶瓷等行业,主要用作高炉出铁沟耐火捣打料,浇注料的骨料,也是制作炼钢长水口,滑板和各种刚玉砖的理想原料。
Dense fused alumina is mainly refined with high purity alumina powder and reducing agent at a certain ratio as the main raw material, melted in the electric arc furnace with high temperature before cooling. It has light grey color with good acid-base resistance, higher melting point, high bulk density and very low porosity, with the characteristics of good abrasive resistance, slag resistance, bulk stability, and thermal shock resistance under high temperature. It is widely used in ferrous metallurgy, petrochemical, building and ceramic industries, used as the aggregates of refractory ramming materials and castables, and also the ideals raw materials of manufacturing steel long spout, sliding plates and various corundum bricks.
 
  理化指标：Physical and Chemical Indexes

化学成分chemical composition	Al2O3%	SiO2%	Fe2O3%	TiO2%	体积密度bulk density(g/cm3)
致密刚玉骨料aggregates	≥99.0	≤1.0	≤0.15	≤0.1	3.85
致密刚玉细粉fine powder	≥98.5	≤1.0	≤0.3	≤0.1	——

可为客户提供段砂：0-1mm、1-3mm、3-5mm、5-8mm等，细粉：180#-0、240#-0、320#-0等，也可按客户要求提供其他规格。
We can supply size sand: 0-1mm,1-3mm,3-5mm,5-8mm etc, fine powder: 180#-0、240#-0、320#-0 etc, and other specifications as per the customer’s demand.