Process for dephosphorizing molten pig iron

Details Process for dephosphorizing molten pig iron Process for dephosphorizing molten pig iron

1977-01-04

1977-12-27

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 53, 75 56, 75 58, C21C 702

Patent

active

040652971

ABSTRACT:
A process for dephosphorizing molten pig iron by adding (a) lime, converter slag and/or iron oxide, (b) iron oxide and/or oxidizing gas, and if necessary (c) flourspar and/or soda ash to the molten pig iron stored in a treating vessel in order to adjust the amount of % CaO to correspond to 0.3 to 3.0 times the sum of the amounts of % SiO.sub.2 and % P.sub.2 O.sub.5 and to adjust the amount of total iron to 15 to 50%, in the slag composition after treatment, thereby obtaining a high dephosphorization.

REFERENCES:
patent: 3771998 (1973-11-01), Knuppel
patent: 3782921 (1974-01-01), Glaesener
patent: 3807988 (1974-04-01), Nilles
patent: 3824095 (1974-07-01), Ando

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