초록 ▼

An alumina-carbon shape is manufactured from a composition comprising 1-8 weight percent fine silicon, 1-16 weight percent reactive alumina, 1-30 weight percent calcined fluidized bed coke, 1-30 weight percent of a spalling inhibiting additive, and the balance of the mix synthetic alumina, plus the

An alumina-carbon shape is manufactured from a composition comprising 1-8 weight percent fine silicon, 1-16 weight percent reactive alumina, 1-30 weight percent calcined fluidized bed coke, 1-30 weight percent of a spalling inhibiting additive, and the balance of the mix synthetic alumina, plus the additions of 5-10 weight percent of a high carbon yielding resin as a molding vehicle and 0.5-4 weight percent solvent, and up to 2 weight percent of a low temperature curing agent, such as, paraformaldehyde or hydrochloric acid. The mix is formed at ambient temperature into a shape through an injection molding process. Solidification is accomplished by curing in the mold at a temperature less than 100°C. After stripping the shape from the mold, the solvents are removed from the shape by drying at a temperature above 100°C. The shapes are then heated to a temperature above 550°C. to coke the resin. The shapes may be tar impregnated to decrease coked porosity and to increase their resistance to mold powder.

대표청구항 ▼

A method for manufacturing an alumina-carbon shaped object comprising the steps of: mixing 1-8 weight percent fine silicon, 1-16 weight percent reactive alumina, 1-30 weight percent calcined fluidized bed coke, 1-30 weight percent of a spall inhibiting additive, and the balance of the mix synthetic

A method for manufacturing an alumina-carbon shaped object comprising the steps of: mixing 1-8 weight percent fine silicon, 1-16 weight percent reactive alumina, 1-30 weight percent calcined fluidized bed coke, 1-30 weight percent of a spall inhibiting additive, and the balance of the mix synthetic alumina with the additions of 5-10 weight percent of a high carbon yielding resin as a molding vehicle, 0.5-4 weight percent solvent and up to 2 weight percent of a low temperature curing agent; injection molding the mix to produce shaped objects; initially curing the shapes at a temperature less than 100°C.; stripping the shape from the mold; further curing the shape at a temperature above 100°C.; and enhancing the strength of the shape by heating the shape at a relatively high temperature above 550°C. to promote coking of the resin molding vehicle.