Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1988-06-14
1989-06-27
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 24, 75 53, 75257, C22B 400
Patent
active
048426423
ABSTRACT:
In ladle refining of steel a molten protective slag covering is used consisting of iron blast furnace slag, or of a mixture of solid burnt lime and/or burnt dolomitic lime together with iron blast furnace slag in an amount effective to serve as a flux promoting the melting of the lime and dolomitic lime. The iron blast furnace slag avoids the environmentally harmful emissions caused by use of fluorspar as a flux. It forms a quicker melting slag, resulting in lower power usage and shorter refining times. It forms a final slag with good physical properties. There is considerable reduction of wear of the ladle and roof refractories and carbon pick up from the ladle refining electrodes is minimized.
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Hamilton Specialty Bar Division of Slater Industries Inc.
Rosenberg Peter D.
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