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Half silica alumina (Al2O3) content: for 15 to 30 percent of the aluminum silicate refractory products. General use contain quartz refractory clay, YeLaShi (4SiO2 Al2O3 · · H2O), refractory clay or kaolin dressing tailings as raw materials. Half the process of silica burn small, this is because in the contraction ℃ temperature, the raw material 1,250 square in quartz transformation, volume expansion, half the quartz silica part offset clay sintering generated when contraction.

Half of the silica manufacturing process can be divided into burning into or doesn't burn into two. Burning into brick manufacturing technology and fireclay brick basic same; Don't burn into brick is used more sodium silicate made with combination agent.

And a half high silica volume stability (inflation), a slight is helpful to improve the masonry integrity, weakening of masonry slag erosion action; Slag contact with high temperature, the surface of the brick form a layer of viscosity larger glaze of substance, blocking porosity, prevent to penetrate slag inside the brick, thereby improving the brick erosion resistance ability; Higher temperature and load deformation start; So in some occasions, its service life not comparable to general fireclay brick.

Half silica gelang electrical appliance Co. liners and mainly used bet the fireproof layer poured steel system. In addition, still can be used for hot stove top, regenerator grid brick, HuaTieLu lining, all kinds of kiln furnace bottom and pipe of parts.