RU94045593A - Method of processing steel in casting ladle - Google Patents

Abstract

FIELD: ferrous metallurgy. SUBSTANCE: steel is smelted in steel-smelting apparatus. Intermediate product is discharged into ladle whereto alloying components are added. Metal is agitated in the ladle by means of blowing an inert gas through it while heating metal with electric arc. During all metal heating period, a silicon-containing material, for instance, ferrosilicon is fed onto the smelt within arc action zone at per-minute input (Q) determined from dependence: Q = (10-1000)q, kg/t min, where q is input of inert gas, cu.m/t min. After smelt heating is stopped, smelt is blown through with neutral gas for a time period determined from relationship:. In given equations, (1--1000) is empiric coefficient reflecting degree of consuming ferrosilicon by smelt, kg/cu.m, and (0.05-0.5) is that characterizing smelt agitation degree, (min t)m. EFFECT: increased steel purity.

Claims (1)

The invention relates to metallurgy, and in particular to out-of-furnace steel processing using its electric arc heating in a ladle. The technical effect when using the invention is to increase the purity of the steel after its processing. The specified technical effect is achieved by smelting the metal in the steelmaking unit, releasing the intermediate from it into the ladle, feeding alloying additives into the ladle, mixing the metal in the ladle by blowing neutral gas into it, and also producing electric arc heating of the metal in the ladle. During the entire period of heating the metal, a silicon-containing material, for example, ferrosilicon with a minute flow rate determined by the dependence given in the description, is fed into the melt in the arc zone.