P507萃取煤矸石硫酸浸出液中镓的实验研究  

Experimental Study on Extraction of Gallium from Sulfuric Acid Leaching Solution of Coal Gangue by Using P507

作　　者：郭文超 李望 朱晓波 张治国 张传祥 GUO Wen-chao;LI Wang;ZHU Xiao-bo;ZHANG Zhi-guo;ZHANG Chuan-xiang(School of Chemistry and Chemical Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南理工大学化学化工学院,河南焦作454000

出　　处：《稀有金属与硬质合金》2022年第4期28-32,共5页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金项目(52074109);河南省高等学校青年骨干教师培养计划项目(2019GGJS056);河南理工大学杰出青年基金项目(J2022-3)。

摘　　要：以煤矸石硫酸浸出液为研究对象,利用2-乙基己基磷酸单2-乙基己基酯(P507)萃取分离其中的镓与铁。考察了溶液pH值、P507浓度、振荡时间、振荡强度、萃取温度对镓和铁萃取率的影响。结果表明:在A/O相比1∶1、P507浓度20%、溶液pH值1.5、振荡时间15 min、振荡强度200 r/min和萃取温度35℃的条件下,Ga单级萃取率可达82%,Fe单级萃取率低于18%。改变A/O相比进行萃取实验,绘制了镓的萃取平衡等温线,确定了在A/O相比4∶1的条件下,镓理论萃取级数为四级,此时镓的萃取率为98.4%,而铁萃取率为17.4%,其余金属离子萃取率均低于10%,可实现镓的选择性萃取。Gallium and iron from sulfuric acid leaching solution of coal gangue were separated by extraction with 2-ethylhexyl phosphate mono-2-ethylhexyl ester(P507).The effects of solution pH value,P507 concentration,oscillation time,oscillation intensity and extraction temperature on the extraction efficiency of gallium and iron were investigated.The results show that the single-stage extraction rate of Ga^(3+)reaches 82%while that of Fe^(2+)is lower than 18%,under the conditions of A/O ratio of 1:1,P507 concentration of 20%,solution pH value of 1.5,oscillation time of 15 min,oscillation intensity of 200 r/min and extraction temperature of 35℃.The extraction experiments were performed by changing the A/O ratio,and then the equilibrium isotherm of gallium extraction was determined.Under the condition of 4:1 A/O ratio,the theoretical extraction stage of gallium is four,and the extraction rate of gallium is 98.4%while the extraction rate of iron is 17.4%,and the extraction rate of other metal ions is less than 10%.Therefore,the selective extraction of gallium from sulfuric acid leaching solution of coal gangue could be realized.

关 键 词：镓 萃取 P507 煤矸石 浸出液 铁 

分 类 号：TF843.1[冶金工程—有色金属冶金]