Castable refractory material

Details Castable refractory material Castable refractory material

C - Chemistry, Metallurgy

04

B

C04B 35/10 (2006.01) C04B 35/66 (2006.01)

Patent

CA 2151217

The castable refractory material comprising as binders, per 100 parts by weight of solid components, (a) 10-30 parts by weight of water-inactive, fine refractory powder, which is a mixture of fine refractory powder having an average diameter of 0.2-0.6 µm and fine refractory powder having an average diameter of 1-10 µm at a ratio of 1:2-2:1; (b) 2-7 parts by weight (as an effective amount) of alumina cement having an average diameter of 3-8 µm, cement clinker minerals thereof comprising CaOAl2O3 and CaO2Al2O3, with 12CaO7Al2O3, if any, in such an amount that a diffraction intensity index of the 12CaO7Al2O3 at a lattice plane distance D of 2.68 .ANG. is 1 or less assuming that the diffraction intensity index of the CaOAl2O3 at a lattice plane distance D of 2.96 .ANG. is 100; and (c) 0.4-3 parts by weight of fine amorphous silica powder having an average diameter of 0.5 µm or less; the balance of the solid components being substantially refractory aggregate and refractory powder.

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