Removal of tin from molten iron by chlorination, using oxygen to

Details Removal of tin from molten iron by chlorination, using oxygen to Removal of tin from molten iron by chlorination, using oxygen to

1975-09-18

1977-05-31

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 63, 75 64, C21C 530

Patent

active

040266982

ABSTRACT:
A process for detinning molten iron involves bubbling gaseous chlorine through the molten iron bath, which contains dissolved tin among other elements (e.g. manganese). As chlorides of tin, iron and these other elements are leaving the metal bath in vapor form, and subsequently after condensation, these chlorides are oxidized by injection of oxygen into the space above the molten bath and into the gas duct and heat exchanger, thereby converting the chlorides into their respective oxides and liberating the chlorine as a gas for recycling. Because of this chlorine recycling, net chlorine requirements of the present process are very much less than the net chlorine requirements in a detinning process that involves simply chlorine treatment of molten iron.

REFERENCES:
patent: 2899295 (1959-08-01), Kattner
patent: 3484232 (1969-12-01), Karinthi
patent: 3615357 (1971-10-01), Wainer
patent: 3640702 (1972-02-01), Karinthi

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