The process of acid leaching of calcification roasted vanadium slag was studied. The effects of process parameters variation on phase of the vanadium leaching residue, leaching rate of vanadium and the reason of vanadium loss were analyzed. The results showed that the main phase of vanadium leaching residue was insoluble in acid of dense solid solution R2O3 and Fe2TiO5, which was also mixed with silicate pyroxene phase and small amount of vanadate phase. The vanadium leaching rate first increased and then decreased with raising the roasting temperature, roasting time and the CaO/V2O5 mass ratio. Silicate species and its effect on vanadate, spinel oxidation incomplete, vanadium and vanadium bronze solid solution in of R2O3, and the difference of best leaching acidity of Ca3V2O8, Ca2V2O7 and CaV2O6 were the causes of vanadium loss.
对钒渣钙化焙烧后的熟料用硫酸浸出，分析了不同条件下焙烧的熟料对钒浸出渣物相、钒浸出率的影响及钒损失的原因. 结果表明，钒浸出渣的主要物相为不溶于酸的致密固溶体R2O3和铁板钛矿Fe2TiO5，其间混有硅酸盐辉石相和少量钒酸盐相. 钒浸出率随焙烧温度、焙烧时间和钙钒质量比增加呈先增加后减小的趋势. 硅酸盐种类及其对钒酸盐的影响、尖晶石氧化不完全、R2O3相中固溶V和钒青铜及正、焦、偏钒酸钙最佳浸出酸度不同是造成钒损失的原因.
[1]付自碧，彭毅. 钒渣富氧钙化焙烧试验研究 [J]. 钢铁钒钛, 2014,35(4): 1-5.<br>[2]Wang T Y, Xu L J. Calcified Roasting-Acid Leaching Process of Vanadium from Low-grade Vanadium-containing Stone Coal [J]. Chin. J. Geochem., 2014, 33(2): 163–167.<br>[3]Bao S X, Liang L. Effect of Calcium on the Vanadium Extraction from High Calcium Type Stone Coal [J]. Journal of Wuhan University of Technology (Mater. Sci. Ed.), 2015, 30(2): 320-323.<br>[4]包申旭，张一敏. 石煤焙烧过程中矿相与钒价态的变化及对钒浸出的影响 [J]. 矿冶工程, 2012, 32(2): 90-92. <br>[5]Ognyanova A, Ozturk A T, De Michelis I, et al. Metal Extraction from Spent Sulfuric Acid Catalyst through Alkaline and Acidic Leaching [J]. Hydrometallurgy, 2009, 100(2): 20-28.<br>[6]王永双. 用溶剂萃取法从炭质页岩中回收钒钼[J]. 稀有金属,1995(4):9-16<br>[7]赵博. 钒渣钙化焙烧机理的研究[D]. 东北大学,2014.<br>[8]陈厚生. 钒渣石灰焙烧法提取V<sub>2</sub>O<sub>5</sub>工艺研究[J]. 钢铁钒钛,1992, 13(6): 1-9.<br>[9]尹丹凤,彭毅,孙朝晖,何文艺. 攀钢钒渣钙化焙烧影响因素研究及过程热分析[J]. 金属矿山,2012,(04):91-94. <br>[10]张菊花，张伟，杨勇霞. 钒渣钙化焙烧的影响因素及焙烧氧化动力学 [J]. 东北大学学报, 2014, 35(6): 831-835. <br>[11]Zhang J H, Zhang W. Mechanism of Vanadium Slag Roasting with Calcium Oxide [J]. Int. J. Miner. Process., 2015, 138: 20-29.<br>[12]Li X S, Xie B. Extraction of Vanadium from High Calcium Vanadium Slag Using Direct Roasting and Soda Leaching [J]. Int. J.Miner. Metall. Mater., 2012, 19(7): 595-601.<br>[13]李晓军. 钒渣中尖晶石生长规律及钒渣钙化焙烧机理的研究[D]. 重庆大学,2011.<br>[14]李新生. 高钙低品位钒渣焙烧-浸出反应过程机理研究 [D]. 重庆：重庆大学，2011: 66-69. <br>[15]史志新，苑天宇. 钙化焙烧钒渣过程中钒尖晶石的矿物学特征[J]. 矿冶, 2014, 23(5): 95-98. <br>[16]史志新，刘锦燕. 钒渣焙烧过程中物相的矿物学特征探讨 [J].冶金分析, 2014, 34(7): 12-17.<br>[17]王春梅，刘锦燕，史志新，等. 钒渣物相结构及钙化焙烧相变对钒转化率的影响因素探讨 [J]. 冶金分析, 2015, 35(6): 26-30. <br>[18]宋文臣，李宏，张勇健. X 射线光电子能谱分析钒渣熟料中钒的价态 [J]. 冶金分析, 2014, 34(4): 27-31.<br>[19]付念新,张林,刘武汉,涂赣峰,隋智通. 钒渣添加石灰石氧化焙烧过程中物相的转化行为[J]. 过程工程学报,2017,17(02):285-291. [2017-09-13].<br>[20]田茂明. 含钒钢渣提钒工艺及其主要技术[J]. 重庆科技学院学报,2009,11（2）：59-63<br>
