To comprehensively reuse lead-zinc tailings, the recovery of valuable metals from magnetic tailings after iron recovery from lead-zinc tailings using roasting followed by chloride leaching was studied in this paper. The recovery of metals was investigated by studying the effects of roasting temperature, leaching temperature, liquid-to-solid ratio, chloride ion concentration and acid concentration on the metal leaching efficiency. The results showed that the leaching efficiencies of Ag, Ga and Pb reached 84.39%, 80.76% and 70.47%, respectively, at a roasting temperature of 900 °C and with the optimized leaching parameters. The Ag (9.98 mg/L), Ga (18.62 mg/L) and Pb (1506.12 mg/L) in the leaching liquor could be further recovered. The leaching kinetics showed that the silver leaching was controlled by the diffusion of the fluid species, and the activation energy was 22.06 kJ/mol. Furthermore, the leaching residue was analyzed. The results of X-ray fluorescence spectrometry, chemical speciation and extraction toxicity analyses suggested that the pollution risk of the leaching residue has been substantially eliminated and that further reuse of the residue was possible. With this method, the processes of metal recovery from magnetic tailings using roasting followed by chloride leaching were proposed for the comprehensive utilization of lead-zinc tailings.
Journal of Cleaner Production – Elsevier
Published: Apr 20, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera