Two low-carbon renovation processes based on plasma are designed for blast furnace ironmaking to reduce carbon dioxide emission.On the basis of CO2 capture and separation,CO2 and the reduction gases in the blast furnace tail gas are recycled respectively,and driven by the plasma back to the blast furnace to participate in the reduction reaction again.Aspen Plus software is utilized to simulate these two renovation processes and a traditional blast furnace model,respectively.The material flow and energy flow are obtained,and the industrial improvement direction for this task is further obtained through sensitivity analysis and exergy analysis.The actual exergy efficiencies of these two renovation blast furnace processes are 82.7％and 74.8％,respectively,which are better than those of the traditional blast furnace.Compared with the traditional blast furnace from three aspects of energy consumption,carbon dioxide emission and economy,the feasibility of these renovation processes are demonstrated.
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