攀枝花红格南矿区的高铬型钒钛磁铁矿是重要的钒钛铁矿资源,对其进行了碳还原热力学分析和实验,从还原产物组成、微观组织结构形貌和物相中元素含量分析,揭示和探明了不同还原温度下矿中金属元素Fe、Ti、V、Cr的赋存转化路径、富集规律、还原产物金属化率及还原度。研究表明,在碳与铁矿中总氧摩尔比1.3条件下,关键金属元素的转化路径为：Fe3O4 → FeO → Fe；Fe2TiO5 → Fe2TiO4 → FeTiO3 → (Mg, Fe)Ti2O5；FeO.V2O3 → V2O3 → VO；FeO.Cr2O3 → Cr2O3 → Cr；碳热还原后,金属相以Fe元素为主；Ti和V主要富集于钛相,渣相以镁铝尖晶石为主。温度高于1250℃时,Cr氧化物被还原为金属Cr,溶于金属相中,V氧化物未被还原。随着温度升高,Fe的金属化率和还原度提高,温度达1350℃时,Fe的金属化率达89.01%、还原度达90.53%。

The high chromium vanadium titanomagnetite in the Honggenan mining area of Panzhihua is a vanadium titanomagnetite resource that will be developed and utilized. In this paper, through the thermodynamic analysis of carbon reduction of high chromium vanadium titanomagnetite and the high temperature carbon reduction experiment, the phase composition, microstructure morphology and element content in different phases of the reduction products were studied. The occurrence, transformation and enrichment of metal elements Fe, Ti, V and Cr in high chromium vanadium titanomagnetite at different reduction temperatures were analyzed in detail, as well as the metallization rate and reduction degree of the reduction products. The results show that under the condition of 1.3 molar ratio of carbon to total oxygen in iron ore. The transformation law of the occurrence form of the main metal elements in iron ore is: Fe₃O₄ → FeO → Fe；Fe₂TiO₅ → Fe₂TiO₄ → FeTiO₃ → (Mg, Fe)Ti₂O₅；FeO.V₂O₃ → V₂O₃ → VO；FeO.Cr₂O₃ → Cr₂O₃ → Cr；When the temperature is higher than 1250 °C, the Cr oxide is reduced to metal Cr and dissolved in the metal phase. V oxide is not reduced to metal V. With the increase of temperature, the metallization rate and reduction degree of Fe increase. When the temperature reaches 1350 °C, the metallization rate of Fe reaches 89.01 % and the reduction degree reaches 90.53%.

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