METHOD FOR PREPARING FERROCARBON INTERMEDIATE PRODUCT FOR USE IN STEEL MANUFACTURE AND FURNACE FOR REALIZATION THEREOF

摘要

The hereinproposed method and furnace provide for preliminary building up of melt in a melting pot of a rectangular shape in the horizontal section, delivery of an oxygen -containing gas into the melt below its surface level through tuyeres with nozzles installed in the longer walls of the melting pot, creating two melt zones: an upper zone loaded with solid carbon fuel in an amount sufficient for providing a volumetric concentration of said fuel within 0.5 to 50% of the melt volume in said zone, wherein said concentration is maintained by subsequent concurrent loading of iron-bear-ing material and solid carbon fuel, and a lower zone consisting of a layer of slag and a layer of ferrocarbon intermediate product, said layers being discharged separately through channels made in the counteropposed walls of the melting pot. The ratio of the horizontal section area of the melting pot at the installation level therein of tuyeres to the total area of the outlet holes of the nozzles is 300-10000, while the distance from the lower boundary of the product discharge channel to the upper boundary of the slag discharge channel is 0.3 to 0.75 the distance from the lower boundary of the product discharge channel to the tuyere installation level.