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.
关键词
钒钛精矿/电炉冶炼/熔融还原/钒资源回收/富钛料/钒/配碳比
Key words
vanadium-bearing titanium concentrate/electric furnace smelting/smelting reduction/vanadium resource recovery/titanium-rich material/vanadium/carbon ratio
维普
万方数据