Enrichment and reconfiguration of titanium-bearing phase in vortex smelting reduction process of vanadium-titanium magnetite  

作　　者：Yong-chao Han Zhi-he Dou Rui Zhang Ting-an Zhang Shuai Fang 

机构地区：[1]Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education),Shenyang 110819,Liaoning,China [2]School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China

出　　处：《Journal of Iron and Steel Research International》2024年第7期1582-1589,共8页钢铁研究学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (U1908225);the Fundamental Research Funds for Central Universities (N2225012 and N232405-06).

摘　　要：To comprehensively utilize the low-iron high-vanadium-titanium magnetite,a new method of vortex smelting reduction of vanadium-titanium magnetite was proposed,and the enrichment and reconstitution regularity of Ti-bearing phases in the slag was investigated through X-ray fluorescence spectrometry,X-ray photoelectron spectroscopy,X-ray diffraction analysis,and optical microscopy.The phase diagram revealed that the preferential crystallization of MgTi_(2)O_(5) can be achieved by adjusting the CaO,MgO,and TiO_(2) contents of slag.The predominant Ti-bearing phases in the slag obtained from the reduction process are MgxTi_(3_x)O_(5)(0≤x≤1)and CaTiO_(3).FeTiO_(3) is present at carbon-iron ratio(CR)=1.3,while MgTi_(2)O4 and TiC are formed at CR=1.3.The enrichment of TiO_(2) in the slag increases first and then decreases as the CR increases,and at CR=1.1,the enrichment of TiO_(2) in the slag reaches 51.3 wt.%.Additionally,the concentrations of MgxTi_(3_x)O_(5)(0≤x≤1)and CaTiO_(3) in the slag,along with the grain width of MgxTi_(3_x)O_(5)(0≤x≤1),decrease with the increase in CR.

关 键 词：Vanadium-titanium magnetite Vortex smelting reduction Phase reconfiguration TiO_(2)enrichment 

分 类 号：TF7[冶金工程—钢铁冶金]