black fused alumina is characterized by low al2o3 and a certain amount of fe2o3 (10% more or less) content, so black fused alumina has characteristics of moderate hardness, high toughness, high temperature resistance, and stable thermal stability.the black fused alumina of the company concentrated basic tablets, with the characteristics of strong cutting power, high toughness, high flexibility, good abrasion resistance and high working efficiency, which is the best product for grinding and polishing, sandblasting stainless steel products. furthermore, our company , henan ruishi special refractory co., ltd. is established according to the modern management in 1993. as one of the main manufacturers and exporters for abrasive, refractory materials and metallurgy industry in china. we have six plants (one fused plant ,three processing factories, one special refractory material plant,one metallurgy material plant,one acid washing and water washing plant, and sales department ).we can produce 80,000 tons annually. our products are main exported italy, france, russia, american, japan, spain ,canada ,korea and so on. black fused alumina: specification ¢ñ chemical composition:al2o3: 81-85% fe2o3: 9-11% sio2: 8%max specification ¢ò chemical composition:al2o3: 75-80% fe2o3: 10-12% sio2:10%max we have strict control about company & quality;our service is full-around and first-class. so we¡¯re you wise choice.don¡¯t hesitate to contact us. contact person: ms. liang xiaofei(sales manager) helen(at)rs-abrasive.com