doiSerbia

Lead sulphate leaching by sodium chloride solution

Conić Vesna T. (Mining and Metallurgy Institute Bor, Bor)
Pešovski Branka D. (Mining and Metallurgy Institute Bor, Bor)
Cvetkovski Vladimir B. (Mining and Metallurgy Institute Bor, Bor)
Stanojević-Šimšić Zdenka S. (Mining and Metallurgy Institute Bor, Bor)
Dragulović Suzana S. (Mining and Metallurgy Institute Bor, Bor)
Simonović Danijela B. (Mining and Metallurgy Institute Bor, Bor)
Dimitrijević Silvana B. (Mining and Metallurgy Institute Bor, Bor)

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.

Keywords: biohydrometallurgy, complex concentrates, non-ferrous metals, precious metals, lead(II)- sulfate