Technical Analysis on Smelting Reduction Ironmaking Process

Main smelting reduction ironmaking processes were analyzed.COREX process,a pre-reduction shaft furnace + gasifier pure oxygen-bowing process,has been put into industrial production.~250 kg coke and ~1 000 kg fuel are needed for producing 1 ton hot metal.FINEX process,a multi-step fluidized bed + hot briquetting +gasifier +CO₂ absorbing pure oxygen-bowing process,can use ore fines,and its consumption of coke and fuel are ~200 kg and 800 kg per ton hot metal respectively.However,FINEX process is very complex,low efficient and still in the stage of industrial experiment.HISMELT tries to reduce and smelt ore fines by one-step process,but it is difficult for the process to realize the anticipated targets,and the process is still in the stage of technical research.So,present smelting reduction process can not realize low energy consumption and mild pollution ironmaking process,the key problem is the poor deoxidation properties of ore at low temperature.Improving deoxidation properties of ore can help smelting reduction process obtaining success,efficacy and good environment.