Metal refining process

Details Metal refining process Metal refining process

1981-08-17

1982-11-09

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 51, 75 52, 75 59, C21C 532, C21C 534

Patent

active

043583148

ABSTRACT:
A process for refining steel by top blowing with below melt tuyere injection in which at the commencement of the refining cycle the refining gas lance is located at a pre-determined height above the melt, and the gas flow rate to the below melt tuyere or tuyeres is set at a predetermined level, comprising the steps of reducing the height of the lance and the gas flow rate to the tuyeres in one or more stages during the course of the refining cycle and increasing the height of the lance and the gas flow rate to the tuyeres towards the end of the refining cycle.

REFERENCES:
patent: 3854932 (1974-12-01), Bishop
patent: 4089677 (1978-05-01), Spenceley
patent: 4178173 (1979-12-01), Gorges
patent: 4195985 (1980-04-01), Bratzmann
patent: 4280838 (1981-07-01), Marnkawa
patent: 4302244 (1981-11-01), Sieckman

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