钛白废酸加压酸浸转炉钒渣提钒的研究（英文）  

Extraction of Vanadium from LD Converter Slag by Pressure Leaching Process with Titanium White Waste Acid

作　　者：张国权[1] 张廷安[1] 吕国志[1] 张莹[1] 刘燕[1] 谢刚[2] 

机构地区：[1]东北大学多金属共生矿生态化利用教育部重点实验室,辽宁沈阳110819 [2]云南冶金集团总公司技术中心,云南昆明650031

出　　处：《稀有金属材料与工程》2015年第8期1894-1898,共5页Rare Metal Materials and Engineering

基　　金：Chinese National Programs for High Technology Research and Development(2010AA03A405,2012AA062303);National Natural Science Foundation of China(51004033,51204040);National Science and Technology Support Program(2012BAE01B02);Doctoral Fund Project(20120042110011)

摘　　要：研究了以钛白废酸直接加压浸出转炉钒渣提钒的工艺。矿物学研究表明:钒、钛、铁、锰、铬等金属元素形成的尖晶石是转炉钒渣的主要物相。绘制了V-Fe-H2O、V-Ti-H2O、V-Mn-H2O、V-Cr-H2O等三元系150℃高温电位-p H图,明确了酸浸提钒过程的热力学:在低酸度浸出提钒条件下,可溶性离子Fe2+、Fe3+、Mn2+、Cr2+、Cr3+等的热力学稳定与可溶性含钒离子的热力学稳定区重合,酸浸过程中与钒共同进入浸出液中。钛白废酸酸浸正交试验结果表明:温度和初始酸浓度是影响酸浸过程的主要因素。基于正交试验结果,进一步考察温度对浸出过程的影响,结果表明,随着酸浸温度由100℃升高到160℃的过程中,浸出渣中的钛有效富集含量在4.56%至12.0%之间变化,其他离子主要赋存于浸出液中。在较优条件下:温度140℃,液固比10:1,初始酸浓度200 g·L-1,搅拌转速500 r/min,酸浸时间90 min,钒的浸出率为96.85%。The process of extraction vanadium from LD converter slag by pressure leaching with titanium white waste acid was investigated. The mineralogy analysis indicates that several kinds of spinel containing Fe, V, Ti, Mn and Cr, mainly exist in the converter slag. Potential-p H diagrams of V-Fe-H2 O, V-Ti-H2 O, V-Mn-H2 O, V-Cr-H2 O system have been calculated at elevated temperature condition（150 ℃）. The thermodynamics diagrams show that soluble ions of V and Fe2＋, Fe3＋, Mn2＋, Cr2＋ and Cr3＋ can be extracted by the acidic leachate during the pressure leaching process. The results of orthogonal experiment reveal that the impacts of temperature and initial acid concentration on the vanadium extraction process are effective. The effect of temperature on the leaching process was further investigated with a increased temperature from 100 ℃ to 160 ℃, and the results indicate that the content of titanium in the residue is 4.56% to about 12.0%, while other elements tend to be enriched in the leaching solution. Under the optimization condition（temperature 140 ℃, liquid-solid ratio 10：1, concentration of acid at 200 g·L-1, stirring speed 500 r/min and the reaction time of 90 min）, the leaching rate of vanadium is 96.85%.

关 键 词：提钒 钛白废酸 转炉钒渣 加压浸出 电位-p H图 

分 类 号：TF841.3[冶金工程—有色金属冶金]