Recovery of zinc and lead from zinc plant residue

Zinc and lead recovery from zinc plant residue (ZPR) has been investigated. The residue is discarded as a cake from a Waelz kiln processing zinc–lead carbonate ores. The zinc plant residue containing 11.3% Zn, 24.6% Pb, and 8.3% Fe was blended with H 2SO 4 and subjected to a process comprising roast...

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Bibliographic Details
Published in:Hydrometallurgy 2004-11, Vol.75 (1), p.169-176
Main Authors: Turan, M. Deniz, Altundoğan, H. Soner, Tümen, Fikret
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Leaching
Lead
Metals. Metallurgy
NaCl
Production of metals
Sulphuric acid
Zinc
Zinc plant residue
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Summary:Zinc and lead recovery from zinc plant residue (ZPR) has been investigated. The residue is discarded as a cake from a Waelz kiln processing zinc–lead carbonate ores. The zinc plant residue containing 11.3% Zn, 24.6% Pb, and 8.3% Fe was blended with H 2SO 4 and subjected to a process comprising roasting, water leaching, and finally NaCl leaching. The effect of roasting and leaching parameters on the zinc recovery was first studied. About 86% Zn was recovered after roasting at 200 °C for 30 min with an equal weight ratio of H 2SO 4/ZPR followed by leaching at 25 °C for 60 min with a pulp density of 20% solids. For lead recovery, the residual solid after zinc extraction was subjected to NaCl leaching. At a pulp density of 20 g/L, about 89% Pb was dissolved in 200 g/L NaCl at 25 °C in 10 min.
ISSN:0304-386X
1879-1158
DOI:10.1016/j.hydromet.2004.07.008