Tap hole mix
AssigneeNippon Steel Corporation
InventorsTeiichi Ando, Hidenobu Itoi
Life of this patent
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Abstract
A tap hole mix for a blast furnace and the like containing essentially no binder comprising either water or one or more of tar, pitch and asphalt with or without the addition of a resin, which comprises refractory materials composed of grains of one or more of clay, chamotte, alumina, silicon carbide and the like and a carbonaceous material, a hardener comprising a novolak-type phenol resin to which a substance which produces formaldehyde by the thermal decomposition or a thermosetting resin is added in a definite proportion, and an alcoholic solvent. The present inventive tap hole mix is rapidly hardened or set, has excellent corrosion resistance and does not cause the occurence of unpleasant smoke and abnormal dusts.
Claims7
In a tap hole mix for a blast furnace composed of refractory materials and a binder, the improvement which comprises said binder consisting essentially of a novolak phenol resin (A) having a mean molecular weight from 200 to 800, a substance which produces formaldehyde by thermal decomposition when subjected to the furnace heat and an alcoholic solvent, the amount of resin being from 3 to 30 percent based on the total mix, the amount of solvent being from 4 to 15 percent based on the total mix, the amount of formaldehyde producing substance being from 0.5 to 10 percent based on the resin and the remainder of the mix being refractory material.
In a tap hole mix for a blast furnace composed of refractory materials and a binder, the improvement which comprises said binder consisting essentially of a novolak phenol resin (A) having a mean molecular weight from 200 to 800, a substance which produces formaldehyde by thermal decomposition when subjected to the furnace heat and an alcoholic solvent, the amount of resin being from 3 to 30 percent based on the total mix, the amount of solvent being from 4 to 15 percent based on the total mix, the amount of formaldehyde producing substance being from 0.5 to 10 percent based on the resin, a thermosetting resin (B), the amount of resins (A) and (B) satisfying the relationships:
- ##EQU11## and the remainder of the mix being refractory material.
Dependencies are inferred from the claim text.