酸化鉄中の亜鉛除去に関する研究

抄録

In related to the removal of Zn component in pyrite sinder, phase identification, grain size distribution and magnetic characteristics are investigated on the sintered materials from ZnO-Fe₂O₃mixture (1≥ZnO/Fe₂O₃≥0). Further, the feasibility to remove the Zn component as Fe-Zn ferrite from hematiteis examined by means of magnetic separation.
As a result, it was found that, under the suitable condition of sintering, minor Zncomponent can be segregated as ferrimagnetic Fe-Zn ferrite from hematite and sintering temperature is responsible for the grain size and chemical composition ofsegregated Fe-Zn ferrite.
In wet magnetic separation experiments of the sintered materials, the effective removal of the Fe-Zn ferrite could not be observed in spite of comminution enough to liberate hematite which is abundant component.The causes of the failure of this magnetic separation are traced on the artificial mixture of Fe-Zn ferrite and hematite. As a result, it is supposed that the mechanochemical reaction is occured in the course of comminution and it interferes the separation of Fe-Zn ferrite and hematite.