Metal refining process
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United States of America Patent
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Nov 9, 1982
Grant Date -
N/A
app pub date -
Aug 17, 1981
filing date -
Sep 3, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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