通过实验研究了铁浴式熔融还原终还原过程渣中FeO含量的变化规律,发现渣中FeO含量随时间的变化是先升高而后又降低,呈明显的山峰形。FeO含量最大的时刻即是预还原球团矿的熔化终点。由此得出了“两段式”的终还原理论,并且这一理论在热态冶炼扩大实验中亦得到验证。 The variation of FeO content in slag during the reduction and reduction of iron bath was studied experimentally. It was found that the content of FeO in slag increased firstly and then decreased with the change of time, showing obvious peak shape. The moment of maximum FeO content is the melting end of the prereduced pellets. This concludes the “two-stage” final reduction theory, and this theory has also been validated in the hot smelting expansion experiment.