Foam prevention compositions and processes for use in steel prod

Details Foam prevention compositions and processes for use in steel prod Foam prevention compositions and processes for use in steel prod

1982-03-17

1984-09-25

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 51, 75 58, 75 60, C21C 700

Patent

active

044733976

ABSTRACT:
The present invention provides a process for preventing foaming over in the case of converting pig iron into steel, as well as for lowering the phosphorus content, by blowing in oxygen in the presence of basic, slag-foaming materials, with the simultaneous blowing of finely particulate calcium carbide into and/or on to the melt, wherein finely particulate calcium carbide is introduced in an amount corresponding to the oxygen excess of the slag at the point of time at which the rate of decarbonizing increases, the slag foams up and/or the slag indicates an increased oxygen potential.
The present invention also provides a composition and apparatus for carrying out this process.

REFERENCES:
patent: 4242126 (1980-12-01), Freissmuth
patent: 4260413 (1981-04-01), Freissmuth
patent: 4260417 (1981-04-01), Bartos
patent: 4358312 (1982-11-01), Braun

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