(北京有色金屬研究總院 分析測試中心，北京 100088)
摘 要: 研究精銦的化學(xué)清洗提純過程，提出甘油碘化鉀熔煉及甘油氯化銨熔煉相聯(lián)合進(jìn)行化學(xué)提純的方法。研究表明：該方法可將鎘、鉈等雜質(zhì)含量降低到10−6以下，并可直接得到表面光亮平整無雜色的銦電極，化學(xué)清洗提純工藝簡單易操作；甘油碘化鉀熔煉提純的最佳實(shí)驗(yàn)條件是質(zhì)量比控制在m(KI)׃m(In)≥0.01，m(glycerin)׃ m(In)≥0.3，攪拌時(shí)間控制在1 h；甘油氯化銨處理時(shí)氯化銨的用量應(yīng)控制在 m(NH4Cl)׃m(glycerin)=0.15。
關(guān)鍵字: 精銦；化學(xué)清洗；甘油；碘化鉀；氯化銨
（Analysis and Measurements Research Center, General Research Institute for Non-ferrous Metals, Beijing 100088, China）
Abstract: The chemical purifying process of refined indium was studied. In order to remove impurities Cd and Tl effectively, glycerin-KI and glycerin-NH4Cl were used simultaneously to purify indium. The results show that through this method the contents of impurities Cd and Tl in indium can be reduced to less than 10−6, thus refined indium anode with smooth and bright surface can be gained directly and easily. The best experimental conditions of glycerin-KI are m(KI)׃m(In)≥0.01, m(glycerin)׃m(In)≥0.3, and the stirring time should be controlled within 1 h. The ammonium chloride concentration should be controlled within m(NH4Cl)׃m(glycerin)=0.15.
Key words: refined indium; chemical purifying process; glycerin; potassium iodide; ammonium chloride
