文献类型：期刊文献

英文题名：Recovery of gallium from Bayer red mud through acidic-leaching-ion-exchange process under normal atmospheric pressure

作者：Lu, Fanghai Xiao, Tangfu Lin, Jian Li, Anjing Long, Qiong Huang, Fang Xiao, Lihua Li, Xiang Wang, Jiawei Xiao, Qingxiang Chen, Haiyan

第一作者：Lu, Fanghai;路坊海

通信作者：Xiao, TF[1]

机构：[1]Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China;[2]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[3]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Peoples R China;[4]Guangzhou Univ, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China

第一机构：Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China

通信机构：corresponding author), Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China.

年份：2018

卷号：175

起止页码：124-132

外文期刊名：HYDROMETALLURGY

收录：;EI(收录号：20174604397491);Scopus(收录号：2-s2.0-85033499949);WOS:【SCI-EXPANDED(收录号:WOS:000423644800015)】；

基金：The fund supports are from the National Natural Science Foundation of China (51664010, 51664009, 51664008 and 51764006) and the Guizhou Provincial Natural Science Foundation of China (2014-2083, 2016-7095). The anonymous referees for helpful comments and suggestion are also appreciated.

语种：英文

外文关键词：Bayer red mud (BRM); Gallium; Acidic-leaching-ion-exchange process (ALIEP); Recovery

摘要：The Bayer red mud (BRM), generally containing 0.002 wt%-0.008 wt% of gallium (Ga), is an overlooked resource of Ga. In this work, an efficient method, called acidic-leaching-ion-exchange process (ALIEP), was developed to extract Ga from BRM. The ALIEP method involved three main steps: the BRM sample was firstly dissolved by mineral acid and the obtained leaching solution was further purified to remove the Fe3+ Consequently, the purified solution, pre-concentrated by re-circulation process, was efficiently treated by ion exchange process for the Ga recovery. The main influencing factors of the acidic-leaching process were systematically investigated. The optimal Ga leaching conditions were determined as HC1 +/- 159 g/L, liquid-to-solid ratio of 8 mL/g, 55 degrees C, and 5 h, attaining Ga leaching rate of 94.77% and the corresponding Ga3+ concentration of 3.91 mg/L in leachate. A nearly complete iron removal from the leachate was achieved by employing LSD-396 resin under conditions of 45 +/- 2 degrees C, resin dosage of 0.6 g/mL and 2 h. Subsequently, the recovery efficiency of Ga from re-circulation leaching solution using the ion-exchange technology was evaluated. The results indicated that an adsorption rate of 59.84% and desorption rate of 95.32% for Ga were obtained. The concentrated solution contained 97.54 mg/L of Ga, which was enriched 24.95 and 4.75 times compared to the initial leaching solution of 3.91 mg/L and re-circulation solution of 20.52 mg/L, respectively.