Method for electric steelmaking
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United States of America Patent
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Sep 21, 1999
Issued Date -
N/A
app pub date -
Apr 22, 1997
filing date -
Aug 29, 1994
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Abstract
A method of melting and refining metals by high-temperature impinging combustion products generated by a single or multiple oxy-fuel or fuel/oxygen/air combustors that direct a flame towards a predetermined area of scrap to be melted. Once a portion of charged scrap contacted by the flame or flames is melted, an injection of solid carbonaceous fuel is initiated, preferably through a combustion tunnel of at least one of the combustors. High velocity oxygen is directed, simultaneously with carbonaceous material, through at least one dedicated nozzle toward injected solid carbonaceous fuel to mix with this fuel and to generate CO, which is capable of forming foamy slag. Optionally, a supersonic stream of multiple streams of additional oxygen is directed toward the iron--carbon melt to initiate rapid melt refining.
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