METHOD OF STEEL LADLE METALLURGY Russian patent published in 2008 - IPC C21C7/10 

FIELD: metallurgy; ferrous.

SUBSTANCE: said utility invention relates to the ferrous metallurgy, namely, to ladle treatment of steel. The method involves feeding steel into the ladle, its circulation degassing by continuous passing through a vacuum vessel with suction and drain nozzles, feeding the carrier gas to the suction nozzle. Before degassing, vacuum vessel is filled with nitrogen under pressure. During immersion of the nozzles to the steel, nitrogen feeding is stopped and underpressure is created in the vacuum vessel. The use of the invention increases degassing capacity and decreases operation costs.

EFFECT: increased steel degassing capacity; decreased operation costs.

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