Abstract
In last decade, the utilization of CO2 resources in steelmaking has achieved certain metallurgical effects and the technology is maturing. In this review, we summarized the basic reaction theory of CO2, the CO2 conversion, and the change of energy-consumption when CO2 was introduced in converter steelmaking process. In the CO2-O2 mixed injection (COMI) process, the CO2 conversion ratio can be obtained as high as 80% or more with a control of the CO2 ratio in mixture gas and the flow rate of CO2, and the energy is saving and even the energy consumption can be reduced by 145.65 MJ/t under certain operations. In addition, a complete route of CO2 disposal technology is proposed combining the comparatively mature technologies of CO2 capture, CO2 compression, and liquid CO2 storage to improve the technology of CO2 utilization. The results are expected to form a large-scale, highly efficient, and valuable method to dispose of CO2.
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