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

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.