Process and Equipment for Blast Furnace Ironmaking Using Pure Oxygen and Gas

摘要

Process and equipment for blast furnace ironmaking using pure oxygen and gas The process for blast furnace ironmaking using pure oxygen and gas includes putting a mineral aggregate consisting of pellet, alkaline sinter, coke and solvent into the furnace from the furnace top, wherein each ton of iron is assigned with coke of 170-200 kg; blasting pure oxygen into the furnace, wherein each ton of molten iron is blasted with oxygen of 120-200 Nm³, and ejecting gas that is pressured and preheated by the ball type hot blast stove into the furnace so as to directly reducing pellet and iron-containing material, wherein the gas is preheated to a temperature raging from 900° C. to 1150° C. and to a pressured up to 0.1-0.6 MPa; purifying and cooling the gas produced in the reducing reaction, and transmitting the gas into a residual pressure power generation device via tubes to be reused and is recovered into a gas cylinder or recycled for use. By using the above process of the present invention, the blast furnace productivity is tremendously increased. The blast furnace productivity is up to 6-8 ton iron/m³*D, the solvent consumption is reduced by two-thirds, the slag amount is reduced by two-thirds, the comprehensive consumption of iron of each ton is up to 492 kgCE/t, and the furnace top gas can be recycled to generate power.