Phase equilibria between iron and slag in carbon monoxide/carbon dioxide/water atmospheres relevant to a novel flash ironmaking technology

摘要: In an effort to develop a novel flash ironmaking process, to be called the Sohn process in this dissertation, with the potential of steelmaking in a single continuous process, the phase equilibria involved and the chemistry of selected slag systems were investigated. The Sohn process is an ecofriendly flash ironmaking process for producing iron from iron oxide concentrates in a flash reactor using fuels and reductants that help reduce energy consumption and minimize greenhouse gas emissions. Amongst the proposed reductants and fuels are H 2, natural gas, and coal gas. The molten bath (iron-slag bath) is expected to equilibrate with gas atmospheres of mainly H 2/H 2 O, CO/CO 2/H 2/H 2 O, and CO/CO 2 corresponding to H 2, natural gas/coal gas (NG/CG), and coke/coal (blast furnace, BF), respectively. The latter was investigated to allow comparison with the blast-furnace conditions. The slag composition was …