METHOD FOR STEEL DEOXIDATION AND ALLOYING Russian patent published in 1995 - IPC

FIELD: ferrous metallurgy. SUBSTANCE: method for steel deoxidation and alloying includes primary deoxidation, blowing with inert gas in ladle, continuous measurement of deoxidation, taking samples, additional deoxidation. Primary deoxidation is carried out by introduction of deoxidizer in preset content. Then, metal is blown with inert gas to obtain minimum value of deoxidation and using the sample results, corrective additive of needed element is introduced, and blowing is repeated to obtain new minimum of deoxidation. Deoxidation (alloying) is repeated until the required content of the given element is attained at preset accuracy. Deoxidation (alloying) is carried out by several elements successively according to growing affinity with oxygen. Deoxidation (alloying) is carried out with heating the melt in ladle. Deoxidation (alloying) is carried out in vacuum. EFFECT: higher efficiency. 5 cl, 3 dwg