Process for dephosphorization and denitrification of chromium-co

Details Process for dephosphorization and denitrification of chromium-co Process for dephosphorization and denitrification of chromium-co

1980-06-23

1982-02-09

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 58, 751305, C21C 702

Patent

active

043148476

ABSTRACT:
A process for dephosphorization-denitrification of Cr-containing pig iron by oxidizing refining is disclosed. Said process comprises maintaining the C concentration of the molten metal at not less than 2%, contacting it with a slag comprising at least one of fluorides and chlorides of alkaline earth metals, at least one of oxides, hydroxides and carbonate of alkali metals, at least one of oxides of iron and nickel, while controlling oxidation of Cr.

REFERENCES:
patent: 3158466 (1964-11-01), Muller
patent: 3309196 (1967-03-01), Kaneko
patent: 3320052 (1967-05-01), Bowden
patent: 3333954 (1967-08-01), Dawson
patent: 3748121 (1973-07-01), Atterbury

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