fused magnesium aluminum spinel is manufactured from high purity raw materials in large electric arc furnace.fused magnesium is a good kind of refractory properties and superior refractory aggregate. fused magnesium can be used in aluminous refractory bodies, prefired shape and monolithics to improve their resistance to slag attack. 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. am-60 chemical composition(%):al2o3:56-62% mgo: 30-32% sio2: 3.5%max am-70 chemical composition(%):al2o3: 71-77% mgo: 22-27% sio2: 3.0%max am-80 chemical composition(%):al2o3: 81-86% mgo: 13-17% sio2: 3.0%max am-90 chemical composition(%) :al2o3: 88-92% mgo: 7-11% sio2: 2.5%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 uscontact person: ms. liang xiaofei(sales manager) helen(at)rs-abrasive.com