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本文用合成样品对氧化矿还原焙烧过程中铁钻化合物物相变化进行了考察。以铁钴氧化物为原料,在550～800℃还原生成的金属相都是以合金状态存在。控制还原条件,能将铁钴氧化物中钴全部还原到金属相,铁大部分还原到Fe_3O_4相。在浸取过程中,具有面心立方金属钴结构的铁钴合金相先消失,具有α-Fe结构的铁钴合金相后消失。绝大部分FeO相很快溶出,剩下小部分FeO相在以后浸出中不再变化。FeO相中含钴量,随FeO相含量的增加而降低。Fe_3O_4相中的钴在氨溶液中似乎是不溶的。
In this paper, the synthesis samples were investigated for the phase transformation of the iron drills during the reduction roasting of oxide ore. Iron cobalt oxide as raw material, at 550 ~ 800 ° C reduction of the metal phase are present in the alloy state. Under the control of the reduction conditions, all the cobalt in the iron cobalt oxide can be reduced to the metal phase, and most of the iron can be reduced to the Fe_3O_4 phase. During the leaching process, the iron-cobalt alloy with face-centered cubic cobalt structure vanishes first, and the iron-cobalt alloy with α-Fe structure disappears first. Most of the FeO phase dissolves very quickly, and the remaining FeO phase does not change after leaching. The content of cobalt in FeO phase decreases with the increase of FeO content. The cobalt in the Fe 3 O 4 phase appears to be insoluble in the ammonia solution.