从含铟铅合金中回收铟

采用电溶-萃取工艺从铅铟合金中回收铟。结果表明,在电流密度155 A/m2、电解周期24 h、电解前液含In 1.8g/L、室温、极距为4 cm的最优条件下,金属铟的溶出率达到94.28%;采用P204从氟硅酸电解液中非平衡萃取提取铟,在有机相组成为30%P204+70%磺化煤油、萃取级数为3级、相比VO∶VA=1∶3的条件下,金属铟的萃取率达到98.69%。负载有机相采用6 mol/L的盐酸反萃,在VO∶VA=6∶1、级数为6级的条件下,反萃率接近100%,同时实现了与杂质元素Zn、Fe、Sn的分离。

Study on Recovery Indium from Lead Alloy Bearing Indium

The process of "electrochemical dissolving-solvent extraction-zinc cementation" is used to recover indium from lead alloy bearing indium.The results indicate that the dissolving ratio of indium can reach 94.28% under the following optimum conditions: current density and electrorefining period is 155 A/m2 and 24 h,respectively,the content of indium in initial electrolyte is 1.8 g/L,the electrorefining process is conducted under room temperature when the electrode distance is 4 cm,indium in electrolyte can be directly extracted by P204.The extracting ratio of indium can gain 98.69% under the following conditions: component of the organic phase is 30 % P204+70% sulfidized kerosene,and the phase ratio of O/A is 1∶3.The three-stage solvent extraction was conducted at 298 K.The loading organic phase can be stripped with 6 mol/L HCl in six-stage.The stripping ratio of indium approaches 100% when the phase ratio of O/A is 6∶1,and also,the impurity elements,such as Zn、Fe and Sn can be removed entirely.