Mullite synthesis of mullite refractories refers to as its main raw material, mullite-oriented Crystal made of refractory material, classification and production process as follows:
1, the sintered mullite brick products: to mullite-aggregate, with high purity mullite fine powders and clay as substrate, through high heat sintering mullite products received. Whether made of sintered mullite material also fused mullite is used as raw materials, sintered mullite refractory materials, production processes and the production of high alumina brick products are similar.
Process points requiring attention are: accurate dosing, mixing, forming under high pressure, full sintered.
Sintering temperature: when aggregate sintered mullite 1550 ~1600 ℃; when fused mullite is used as aggregate > 1700 ℃.
2, mullite cast products: High-alumina bauxite alumina, clay or quartz or industrial ingredients, melting, casting, mullite, annealed products.
Ingredients: raw materials used to produce mullite cast products are mainly industrial alumina, bauxite or clay or silica.
Ingredients: the correct choice of ingredient preparation of mullite formation is relatively low content of high alumina and glass-mullite cast refractory primary process conditions.
