FIELD: metallurgy.
SUBSTANCE: method involves consumable electrode melting, oxygen activity measurement and further Deoxidation of slag bath by reducing mix containing, wt %: aluminium 8-12, calcium 19-23, and iron 74-69, which is force-fed to slag and metal bath interface in neutral gas stream. Iron oxide content in the melted slag is maintained within 0.55 wt %, and Deoxidation mix feed flow rate is 0.9-1.1 of the rate of filling metal bath with liquid metal of consumable electrode.
EFFECT: reduced oxygen content in ingot metal, reduced number of necessary oxygen activity measurements and burning loss of reducing agent.
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Authors
Dates
2015-02-10—Published
2013-12-16—Filed