Method of refining carbon-unsaturated system ferro-chromium

Details Method of refining carbon-unsaturated system ferro-chromium Method of refining carbon-unsaturated system ferro-chromium

1974-09-09

1976-04-27

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

751305, C21C 552, C22C 3304

Patent

active

039531953

ABSTRACT:
Refining with the requirements that a mixing rate of powder ore to lump ore is prepared in the range of 20 to 50%, the amount of SiO.sub.2 in the charging raw materials is readjusted to which the amount of SiO.sub.2 in the slag is in the range of 35 to 45% and impedance of volt-ampere between the electrode and the bottom of furnace is more than 1.6 .times. 10.sup..sup.-3.OMEGA. carbon-unsaturated system ferro-chromium of which both S and Si are low can be easily and stably obtained without desulfurizing out of the furnace.

REFERENCES:
patent: 1586591 (1926-06-01), Wild
patent: 2457055 (1948-12-01), Loveless
patent: 2473019 (1949-06-01), Erasmus
patent: 2557458 (1951-06-01), Ogan

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