Process for periodically and pneumatically stirring a bath of mo

Details Process for periodically and pneumatically stirring a bath of mo Process for periodically and pneumatically stirring a bath of mo

1981-01-02

1983-05-10

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 60, C21C 534

Patent

active

043828175

ABSTRACT:
A process for periodically and pneumatically stirring a bath of molten metal, wherein during the periods in which no stirring effect is required a fluid in gaseous state is injected through injection devices below the surface of the bath of molten metal in an amount sufficient to prevent blockage of the devices, whereas during the periods in which a stirring effect is required a fluid in liquid state which will vaporize quickly upon contact with the liquid metal is injected to provide an optimum amount of mixing gas with a minimum of injection devices.
The process is advantageously used in converters for pneumatically converting pig iron into steel and in which oxygen is blown from above onto the bath of molten metal.

REFERENCES:
patent: 3706549 (1972-12-01), Knuppel
patent: 3817744 (1974-06-01), Leroy
patent: 3819165 (1974-06-01), Courard
patent: 3953199 (1976-04-01), Michaelis
patent: 4001009 (1977-01-01), Bauer
patent: 4174212 (1979-11-01), Bauer

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