PROCEDURE FOR MELTED STEEL DE-OXIDATION AND REFINING Russian patent published in 2011 - IPC C21C7/00 C22B9/10 

FIELD: metallurgy.

SUBSTANCE: empty ladle is heated to temperature of its lining 800-1600°C. Crushed aluminium and dry salt chosen from a group: barium, potassium, sodium salt or their mixture or their mixture with additives of powders of cryolite and silicate-block are loaded into the ladle. The ladle is subjected to vibration wherein aluminium and salts are mixed and melted, whereupon melted steel is poured into the ladle at maintaining vibration of the ladle. The ladle filled with liquid materials is vibrated during 10-300 seconds. Vibration frequency is increased 1.5-3 times intensifying steel de-oxidation with liquid aluminium and removal of aluminium oxides and non-metallic inclusion from steel as vibration frequency is growing. Further vibration is stopped, slag is removed and de-oxidised and purified from non-metal inclusions metal is teemed in a mould.

EFFECT: raised efficiency of de-oxidation, reduced losses of temperature and fluidity of metal, reduced rejects of produced ingots.

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