Plugging compositions for blast furnace tap holes
AssigneeSumitomo Durez Company, Ltd.
InventorsKyohei Funabiki, Tetsuya Tokunaga
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Abstract
Plugging compositions for blast furnace tap holes comprising a refractory filler, a wetting agent, and a binder therefor comprising a phenol-aldehyde condensate resin chemically modified by reaction with lignin have a muddy consistancy, and are characterized by enhanced compressive strength at elevated temperatures and increased plasticity at low temperatures as compared to conventional binders.
Claims6
A blast furnace tap hole plugging composition comprising a condensate resin of a phenol and an aldehyde chemically modified by reaction under heating with a lignin selected from the group consisting of sulfite pulp lignin and kraft pulp lignin, present in an amount of about 5 to about 500 parts by weight per 100 parts by weight of phenol, a refractory filler, and a wetting agent present in an amount of from about 0.5 to about 20 parts by weight per 100 parts by weight of refractory filler, wherein the resin is present in a range of about 5 to about 30 parts by weight per 100 parts by weight of refractory filler.
Dependencies are inferred from the claim text.