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Lead sulphate leaching by sodium chloride solution

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Author(s): Conić Vesna T. | Pešovski Branka D. | Cvetkovski Vladimir B. | Stanojević-Šimšić Zdenka S. | Dragulović Suzana S. | Simonović Danijela B. | Dimitrijević Silvana B.

Journal: Hemijska Industrija
ISSN 0367-598X

Volume: 67;
Issue: 3;
Start page: 485;
Date: 2013;
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Keywords: biohydrometallurgy | complex concentrates | non-ferrous metals | precious metals | lead(II)- sulfate

ABSTRACT
Bioleaching treatment of complex multi-metallic Cu-Zn-Pb-Ag-Au mineral concentrates leds to the formation, besides easily soluble zinc and cooper sulphates, of hardly soluble lead (II) sulfate (PbSO4) sludge. To determine the leaching parameters of PbSO4 with NaCl in the bioleaching residue, lead sulphate solution was synthetically prepared. The effect of process parameters, namely NaCl concentration, solid:liquid phase ratio, processing time, temperature and Cl ions was examined. It was found that 100% Pb by leaching can be achieved with NaCl concentration of 250 g/dm3, time 20 min, temperature 353 K and solid:liquid phase ratio =1:20.
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