Process for refining molten steel containing chromium

Details Process for refining molten steel containing chromium Process for refining molten steel containing chromium

1980-05-08

1981-06-09

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 59, C21C 702

Patent

active

042722870

ABSTRACT:
A chromium-containing steel refining process which is employed in a decarburizing refining of chromium-containing steel includes a step of blowing oxygen and inert gas below the upper surface level of molten steel for performing decarburizing reaction there, and a step of blowing oxygen-containing gas above the upper surface level of the molten steel, for the purpose of burning carbon monoxide gas produced from the upper surface of the molten steel, which oxygen-containing gas includes therein oxygen at least 0.2 times as much as the amount of the oxygen blown below the upper surface level of the molten steel.

REFERENCES:
patent: 3854932 (1974-12-01), Bishop
patent: 3953199 (1976-04-01), Michaelis
patent: 3997335 (1976-12-01), Kolb

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