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对煤粉还原钒钛磁铁矿过程中产生的铁氧化物和钛铁化合物进行热力学分析,得出工艺还原过程中的反应热力学数据,进一步采用高温炉在还原温度1350℃、配碳比1.0、还原煤粒度小于75μm的条件下,考察还原时间对工艺指标的影响和还原过程,得出不同还原时间下产物的定量结果和物相成分.结果表明,还原时间为60min时,还原产物的全铁、金属铁、金属化率均达最大值,分别为68.60%,65.81%和95.93%,钒钛磁铁矿中铁氧化物的还原过程为Fe2O3→Fe3O4→FeO→Fe,钛铁化合物的还原过程为Fe2TiO5→Fe2TiO4→FeTiO3→FeTi2O5.
The thermodynamic analysis of iron oxides and ferrotitanium compounds produced during pulverized reduction of vanadium titanomagnetite leads to the thermodynamic data of the reaction during the process of reduction, further using the high temperature furnace at a reduction temperature of 1350 ℃ with a carbon ratio of 1.0, Reducing coal particle size of less than 75μm under the conditions of the reduction time on the process indicators and the reduction process to obtain the results of different reduction time product quantitative results and phase components.The results show that the reduction time of 60min, , The metal iron and the metallization reached the maximum value of 68.60%, 65.81% and 95.93%, respectively. The reduction process of iron oxide in vanadium-titanium magnetite was Fe2O3 → Fe3O4 → FeO → Fe, and the reduction process of the iron-titanium compound was Fe2TiO5 → Fe2TiO4 → FeTiO3 → FeTi2O5.