... is 50%-65%, and a small number of alkali metals, metal oxides, etc. Mineral composition is usually mullite, quartz and ... , hot blast stove, furnaces of metallurgic, building material, glass, ferrous metal and so on.Technical Specifications: ItemIndexSK-30SK-32SK-34SK-35AL2O3 ... brick have very good ability of anti-acidity, anti-metal fluid corrode and anti-oxidation.High alumina brick are used ...