Lance for powder top-blow refining and process for decarburizing

Details Lance for powder top-blow refining and process for decarburizing Lance for powder top-blow refining and process for decarburizing

1982-12-20

1984-01-17

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 52, 75 60, 266268, C21C 710

Patent

active

044262248

ABSTRACT:
The invention relates to a refining lance used in blowing some additive into molten metal in a vacuum vessel when molten metal, such as molten steel, refined by employing a converter or electric furnace or the like is further refined into a metal having the desired composition. The lance includes a center hole for jetting the additive in the presence of gas and a plurality of side holes (Laval nozzle holes) for supply of accelerating gas so as to have the additive effectively added to the molten metal. The invention also proposes a method for producing low-carbon high-purity steels in molten state by using the refining lance.

REFERENCES:
patent: 3304173 (1967-02-01), Smith

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