High-Ni and/or high-Co, Mo-containing alloy steel is melted and peroxidized to convert Mo contained in the steel into molten Mo oxides. This peroxidized molten steel is treated with a molten slag forming agent comprising at least one basic oxide selected from the group consisting of alkali metal oxides and alkaline earth metal oxides and at least one acid oxide, to form double salts with the said Mo oxides and the said slag forming agent, and then discharging steel slag containing the said double salts.
Novel utilizations of strontium aluminate, a by-product of the manufacture of strontium, are disclosed in connection with the art of steelmaking. It is useful as a synthetic slag covering for molten iron or steel, as well as in the foaming slag practice, as a backfilling material for spaces between the safety lining and the working lining of a ladle, as a major component for a blend from which are made pellets or briquettes useful as a slag conditioner, as an additive to calcium aluminate which has the effect of substantially lowering the melting point of calcium aluminate, as a tracer material to determine the source of impurities, and as a binder to recycle metal-containing dust.
