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钛磁铁矿是一种复杂的共生矿石,含有钛铁矿、磁铁矿、铁铝尖晶石和镁铁铝尖晶石等矿物。对从印度东部采集到的钛磁铁矿石进行XRD、WDXRF、SEM和M?ssbauer谱分析。在氧气气氛下,通过TG-DTA分析对矿石的氧化行为进行研究。随后,在氧气和空气气氛下,将样品在不同温度下(873~1473 K)保温不同时间,进行等温氧化实验。观察到在较低的温度下钛铁矿相转变为赤铁矿、氧化钛,而在较高的温度下转变为钛酸亚铁相。将氧化后的矿样与焦炭混合压制成圆柱形球团,在1473 K下进行直接还原,成功地实现了将磁铁矿铁转变为氧化铁和二氧化钛的相变。
Titanium magnetite is a complex symbiotic ore containing minerals such as ilmenite, magnetite, iron-aluminum spinel, and mafic-alumina spinel. XRD, WDXRF, SEM and M? Ssbauer spectral analyzes of titanium magnetite collected from eastern India. The oxidation behavior of ore was studied by TG-DTA analysis in oxygen atmosphere. Subsequently, the samples were incubated at different temperatures (873-1473 K) for different time under oxygen and air atmosphere for isothermal oxidation experiments. The ilmenite phase was observed to be transformed to hematite and titania at lower temperatures and to the ferrous titanate phase at higher temperatures. The oxidized ore sample and coke were mixed and pressed into cylindrical pellets and directly reduced at 1473 K to successfully convert the magnetite into iron oxide and titanium dioxide.