ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 27    No. 5    May 2017

Recovery of Zn and In from ammonium jarosite residue bearing indium by roasting - water leaching method
ZHANG Kui-fang, LIU Zhi-qiang, DAI Zi-lin, GAO Li-xia
(Guangdong Province Research Institute of Rare Metal, Guangdong Province Key Laboratory of Rare Earth Development and Application, Guangzhou 510650, China)
Abstract: Based on the perniciousness and dispose status of ammonium jarosite residue and its phase characteristics, a new process recovering Zn and In from ammonium jarosite residue bearing indium by roasting - water leaching method was put forward. The phase transformation and reaction mechanism of roasting process were investigated, and the best roasting conditions were determined. The effect laws of leaching time, temperature and solid-liquid ratio on leaching were investigated. The results show that, after roasting of jarosite at 650 ℃ for 2 h, ammonium jarosite bearing indium is decomposed into Fe2O3, ZnSO4 and In2(SO4)3. The roasted jarosite residue is leached by water at room temperature for 0.5 h. The leaching rate of Zn and In are 72.02% and 78.73%. The leaching rate of Fe is only 4.42%, Ag and Pb are enriched into the residue.
Key words: ammonium jarosite residue bearing indium; roasting; water leaching; Zn; In
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
Managed by Central South University (CSU)