Process for the manufacture of fired refractory bricks

Details Process for the manufacture of fired refractory bricks Process for the manufacture of fired refractory bricks

C - Chemistry, Metallurgy

04

B

261/30

C04B 35/04 (2006.01) C04B 35/047 (2006.01)

Patent

CA 1064974

ABSTRACT Fired refractory bricks are manufactured from a mixture of sinter magnesia and chrome ore, in which the magnesia and the chrome ore contain fine grains with a size below 0.15 mm, and the mixture is moulded into bricks and fired at a temperature of 1700 to 1900°C, and in which the mixture contains 2 to 10% by weight, based on the weight of the mixture, of sinter magnesia having a grain size of up to 0.1 mm, at least 70% by weight of this sinter magnesia being present in a grain size below 0.06 mm; the chrome ore is present in the mixture in an amount of 26 to 56% by weight, based on the weight of the mixture, comprising coarse grains of 0,5 to 5 mm, in an amount of 10 to 40% by weight of the chrome ore, and fine grains up to 0.1 mm in an amount of 90 to 60% by weight of the chrome ore, the proportion of these fine chrome are grains below 0.06 mm amounting to at least 70% by weight.

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