STEEL-MAKING METHOD AND PLANT

摘要

A method wherein air is separated in an air separation unit (9), the oxygen thus generated is consumed during at least one step (2, 12, 13) of the steel-making process, the resulting gas is at least partially decarbonated, and the at least partially decarbonated gas is used (at 13) in a reduction reaction of the steel-making process. The partial decarbonation step cyclically includes a CO2 fixation step using a fixation agent, and a regeneration step in which said agent is regenerated in a reactor. Nitrogen generated by the air separation unit (9) is fed into said reactor during said fixation agent regeneration step. The method is useful in combined coal gasification/direct iron ore reduction processes.