摘要
研究了电炉冶炼含钒钛精矿过程中钒元素的还原行为以及钒资源综合回收方式。以云南某地含钒钛精矿为原料,在不同配碳比条件下进行工业级规模电炉冶炼实验,结合热力学理论分析钒元素在渣-铁相的分配及影响因素。结果表明,随着配碳比从6.5%增加至14.0%,钛渣中TiO_(2)质量分数从54.12%升高至92.51%,钒元素被还原进入铁水的比例从1.14%增加至6.61%,钒元素残留在钛渣中的比例从92.95%降至88.17%。少量钒元素进入除尘灰,占比约5.5%,与配碳比无明显相关性。钛渣冶炼过程不利于钒还原,主要归因于欠碳操作和低碱度渣系。含钒钛精矿在电炉冶炼中采用铁水提钒经济上不可行,建议从钛白粉精制除钒工序所得钒泥中提取钒元素。
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 TiO_(2) 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.
作者
王祥丁
刘军
黄翔
廖星星
WANG Xiangding;LIU Jun;HUANG Xiang;LIAO Xingxing(Guangdong Ubridge New Material Technology Co.,Ltd.,Maoming 525000,Guangdong,China;Industrial Technology Incubation Center,Guangdong Academy of Sciences,Guangzhou 510650,Guangdong,China)
出处
《矿冶工程》
CAS
北大核心
2024年第6期121-124,共4页
Mining and Metallurgical Engineering
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
vanadium-bearing titanium concentrate
electric furnace smelting
smelting reduction
vanadium resource recovery
titanium-rich material
vanadium
carbon ratio
