Abstract: Influence of gas flow rate，CO concentration，roasting temperature and roasting time on magnetite induce hematite magnetization roasting process was investigated using pure magnetite and pure hematite as research object.Results indicated that，with the increase of magnetite additive content，the saturated mass magnetic moment and the reaction fraction of roasted products were gradually increasing.That is，the induction effect of magnetite on the magnetization roasting of hematite was more and more intense.With the increase of roasting gas flow rate，roasting temperature and roasting time，the saturated mass magnetic moment and the reaction fraction increasing trend was overall first increased and then decreased.It showed that the inducing effect of magnetite on the magnetization roasting of hematite was first increased and then decreased.With the increasing of CO concentration，the inducing effect of magnetite on the magnetization roasting of hematite was gradually decreased.The results had a certain guiding significance for improving the process of optimizing the roasting technique of iron ore and improving the magnetization roasting process roasting efficienty.

Key words: Hematite, Inducing effect, Magnetic roasting, Reaction fraction