Dual bond taphole mix

Details Dual bond taphole mix Dual bond taphole mix

C - Chemistry, Metallurgy

21

B

C21B 7/12 (2006.01) C04B 35/14 (2006.01) C04B 35/66 (2006.01)

Patent

CA 2055253

DUAL BOND TAPHOLE MIX ABSTRACT OF THE INVENTION A taphole mix which contains a dual bond system including a liquid novolak resin and a powdered pitch. Such a mix develops a quick initial set and a slow final set. This mix has been found to be highly effective in the soaking bar practice used to seal tapholes in blast furnaces. The preferred mix contains about 72 wt.% calcined fireclay aggregate sized - 3 mesh, 10 wt.% crude kyanite, sized -100 mesh, 3 wt.% coke breeze, sized -1/4", and plus additions of about 10.5 wt.% powdered pitch, 8.5 wt.% methylnapthalene #2 solvent, and 2 wt.% liquid novolak resin.

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