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 (two 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 include brown fused alumina95%, brown fused alumina98%,white fused alumina, black fused alumina, compact fused alumina, semi-friable fused alumina, micro crystalline fused alumina, calcium aluminate etc. we have passed iso9001-2000 quality management system certificate. brown fused alumina is fused and crystallized under high temperature from mixture of bauxite and other materials, characterized by its high hardness, good toughness and sharp shape in particles. abrasive tools made of it are suitable for grinding metals of high-tensile strength such as carbon steel, general purpose alloy steel, malleable cast-iron and hard bronze etc. it also can be used as refractory materials. specification: purpose grit no. chemical composition (%) al203 fe203 si02 ti02 f4-f80 95.0min 0.3max 1.5max 3.0max for abrasive f90-f150 94.0min 0.3max 1.5max 3.0max f180-f240 93.0min 0.3max 1.5max 3max p4-p80 95.0min 0.3max 1.5max 3.0max for abrasive p90-p150 94.0min 0.3max 1.5max 3.0max p180-p240 93.0min 0.3max 1.5max 3max for abrasive w1-w63 92.5min 0.5max 1.8max 4.0max 0-1mm 94.5min 0.3max 1.5max 3.0max 1-3mm 95.0min 0.3max 1.5max 3.0max for refractory 3-5mm 95.0min 0.3max 1.5max 3.0max 5-8mm 95.0min 0.3max 1.5max 3.0max 8-12mm 95.0min 0.3max 1.5max 3.0max 0-3mm 94.0min 0.3max 1.5max 3.0max 0-5mm 94.0min 0.3max 1.5max 3.0max for refractory 0-10mm 94.0min 0.3max 1.5max 3.0max 0-25mm 94.0min 0.3max 1.5max 180mesh-0 93.5min 0.5max 1.8max 3.5max for refractory 220mesh-0 93.5min 0.5max 1.8max 3.5max 320mesh-0 93.5min 0.5max 1.8max if you have any requirement, please don't hesitate to inform us. duzude521@rs-abrasive.com . hope we can establish stable long terms business relationship with each other. sales manager : du zu de tel:86-379-65285886-805 mobile phone:13383884596 fax:86-379-65285889 http://www.ycrs.com.cn