Steel making method

Details Steel making method Steel making method

1984-03-29

1986-09-16

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 5912, C21C 710

Patent

active

046120432

ABSTRACT:
A method of making steel having low levels of carbon, nitrogen, phosphorous and oxygen comprises the steps of vacuum reladling a ladle of low phosphorous steel for reducing carbon levels and separating the metal from a highly oxidizing slag, blowing oxygen into the metal contained in a teeming ladle at a vacuum pressure and simultaneously bubbling an inert gas through the metal for removing additional carbon and elevating the temperature of the metal, discontinuing the oxygen blow while maintaining the vacuum pressure and continuing the delivery of inert gas for removal of nitrogen. A desulphurizing agent may be delivered prior to the oxygen blow and alloying additions may be made as required.

REFERENCES:
patent: 3230074 (1966-01-01), Roy
patent: 3761242 (1973-09-01), Finkl
patent: 4104057 (1978-08-01), Maas
patent: 4378242 (1983-03-01), Harris
Secondary Steelmaking-Refining Process in the USA Booklet-Secondary Steelmaking.

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