Method for controlling slag chemistry in a refining vessel

Details Method for controlling slag chemistry in a refining vessel Method for controlling slag chemistry in a refining vessel

1984-04-17

1985-11-05

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75 82, 75 516, C21C 700

Patent

active

045511756

ABSTRACT:
Method for slag chemistry control in a refractory lined vessel during the process of refining metal by the injection of oxygen gas during a period of oxidation and by the injection of nonoxidizing gas or gases during a period of reduction and melt specification adjustment such that the slag at the completion of the refining process will have a preselected composition consisting essentially of A% alumina (Al.sub.2 O.sub.3), B% silica (SiO.sub.2), C% CaO and D% MgO and a ratio X of alumina to silica equal to a preselected value of between about 0.1 to 10. The preselected slag chemistry at the completion of refining is achieved by using a combination of aluminum and silicon to achieve as completely as possible the preselected ratio of alumina to silica in the slag while at the same time satisfying the fuel, reduction, and specification silicon requirements of the bath at the given intervals corresponding to the end of the oxidizing period, the reducing period and the final trim.

REFERENCES:
patent: 4286774 (1981-09-01), Benatar

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