METHOD OF PRODUCING MELT OF IRON OR SEMIPRODUCT OF STEEL AND ALSO OF SPONGE IRON FROM IRON ORE AND PLANT FOR ITS EMBODIMENT Russian patent published in 1999 - IPC

FIELD: metallurgy. SUBSTANCE: method of production of iron melt, or melt of steel semiproducts and sponge iron from charged materials including iron ore, preferably of lumpy and/or granulated iron ore, and, if necessary, fluxes, includes direct reduction of charged materials into sponge iron in zone of reduction with fluidized fixed bed. Produced sponge iron is melted in gasifying zone of melting with supply of carbon carriers and oxygen-containing gas. Generated in this zone are CO and H₂ containing reducing gas which is supplied to reducing zone where it enters into reaction with withdrawn in capacity of export gas. The latter is cleaned from CO₂ and used in production of sponge iron together with one part of reducing gas formed in gasifying zone of melting in the form of reducing gas freed of CO₂ and transported to additional zone of reduction for direct reduction of iron ore. One part of reducing gas generated in gasifying zone of melting is separated and supplied to additional reducing zone to bypass stage of removal of CO₂ to reduce capital investments in plant for embodiment of the method and to raise its productivity. Plant has device for heating of export gas. The device is installed in supplying pipeline of additional reducing reactor. Supplying pipeline connecting melting gasifier with the first reducing furnace has side pipeline branch included in supplying pipeline of reducing gas of additional reactor, bypassing the unit for removal of CO₂. EFFECT: saved investment due to reduced power consumption in production of product. 3 dwg, 10 tbl