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Big Fireclay Bottom Block

Big fireclay block is one of the main varieties of aluminum silicate products. Using big vibrating table and adopting special castable, we produce large fireclay blocks with vibrate moulding technology. The physical and chemical properties and appearance of the blocks have exceeded the national standards. Have high corrosion and pollution resistance against the molten glass, the products are especially used in glass melting furnace tank bottom, cooling and working end sidewall of glass furnace.


Advantages

1.Good corrosion resistance against alkali and molten glass
2.High density, reduce glass defects and improve glass quality
3.Good thermal shock resistance
4.Excellent volume stability at high temperatures
5.Long service life.

Item BN-40a BN-45a
Chemical Composition % Al2O3 ≥40 ≥45
SiO2 ≥55 ≥43
Fe2O3 ≤1.5 ≤1.5
Bulk Density g/cm3 ≥2.3 ≥2.3
Apparent Porosity % ≤18 ≤18
Cold Crushing Strength Mpa ≥40 ≥45
0.2Mpa Refractoriness Under Load T0.6 ℃ ≥1400 ≥1450
Permanent Linear Change 1400℃x2h % ±0.1 ±0.1

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