(1. 中南大學(xué) 冶金與環(huán)境學(xué)院，長沙 410083；
2. 有色金屬資源循環(huán)利用湖南省重點實驗室，長沙 410083；
3. 有色金屬資源循環(huán)利用湖南省工程研究中心，長沙 410083)
摘 要: 針對酸性多金屬浸出液中銻分離回收困難的問題，提出采用萃取-反萃水解法，短流程高效率地回收浸出液中的銻，得到銻水解產(chǎn)物。探索了有機(jī)相組成、相比O/A、萃取時間、反萃液濃度等因素對萃取及反萃過程的影響。結(jié)果表明，最佳工藝條件如下：萃取條件為有機(jī)相組成50%TBP+50%磺化煤油(體積分?jǐn)?shù))、相比O/A 1:1、操作溫度25 ℃、萃取時間30 min、震蕩頻率120 Hz、單級萃取，反萃條件為稀硫酸溶液0.25 mol/L、反萃時間30 min、相比O/A 1:1。在該條件下處理后，浸出液中80.5%的銻富集于銻水解產(chǎn)物中。在600 ℃下對固體產(chǎn)物進(jìn)行熱處理，得到物相為SbO2和Sb2O4的銻氧化物。
關(guān)鍵字: 高酸復(fù)雜含銻溶液；溶劑萃取；磷酸三丁酯；銻氧化物
（1. School of Metallurgy and Environment, Central South University, Changsha 410083;
2. Hunan Key Laboratory of Nonferrous Metal Resources Recycling, Changsha 410083;
3. Hunan Engineering Research Center of Nonferrous Metal Resources Recycling, Changsha 410083）
Abstract:In order to solve the problem of antimony recovery in acid multimetallic leachate, the extraction-stripping hydrolysis was proposed to recover the antimony in the leachate, and antimony hydrolysates were obtained efficiently. The effects of organic phase composition, volume ratio between liquor and origanic phase, extraction time and the concentration of stripping solution on extraction and stripping process were explored. The results show that the optimum extraction conditions are as follows: the organic phase consists of 50% TBP+50% sulfonated kerosene (volume fraction), the operating temperature of 25 ℃, O/A of 1:1 the extraction time of 30 min, the oscillation frequency of 120 Hz and single stage extraction. The conditions of dilute sulfuric acid solution is 0.25 mol/L, stripping time is 30 min, O/A is 1:1. After treatment under this condition, 80.5% of the antimony in the leachate is enriched in antimony hydrolysates. The solid product is heat-treated at 600 ℃ to obtain antimony oxide with SbO2 and Sb2O4 phases.
Key words: antimony-bearing complex solution with high acidity; solvent extraction; tributyl phosphate; antimony oxide
