manufactured from pure quartz sand and industrial alumina,sintered in ultra-temperature tunnel furnace, it has a high content of mullite crystals which confer high melting point,excellent themal shock and chemical corrosion at high temperature.it is widely used as lining bricks in glass body kiln and large hot wind furnace in iron ¨cmaking blast furnace ,as well as in ceramic kiln and petrochemistry. 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. 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