Analysis of Vanadium Reduction Behavior in Smelting Process of Vanadium-Bearing Titanium Concentrate
Based on the study on reduction behavior of vanadium during the smelting of vanadium-bearing titanium concentrate in an electric furnace,the comprehensive recovery of vanadium resources was explored through experiments.The vanadium-bearing titanium concentrate from Yunnan Province was taken as raw material to carry out an industrial-scale smelting experiment in an electric furnace with different carbon ratios.Based on the thermodynamic theory,the distribution and influencing factors of vanadium element in slag-iron phase were all analyzed.The results show that with carbon ratio up from 6.5%to 14.0%,the mass fraction of TiO2 in titanium slag increases from 54.12%to 92.51%,the proportion of vanadium element reduced into molten iron increases from 1.14%to 6.61%,and the proportion of vanadium element left in the titanium slag decreases from 92.95%to 88.17%.It is found that there is a small amount of vanadium in dust,accounting for about 5.5%,which has no significant correlation to carbon ratio.The smelting process of titanium slag is not conducive to vanadium reduction,which is principally attributed to carbon deficiency operation and low-basicity slag system.It is not economically feasible to extract vanadium from molten iron by smelting vanadium-bearing titanium concentrate in an electric furnace,so it is suggested that vanadium should be extracted from the vanadium mud obtained after refining and vanadium removal process of titanium dioxide.
vanadium-bearing titanium concentrateelectric furnace smeltingsmelting reductionvanadium resource recoverytitanium-rich materialvanadiumcarbon ratio
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