Reduction of lead sulfate to lead sulfide with carbon monoxide

In order to decrease the solubility of PbSO 4 and enhance lead recovery from PbSO 4 bearing wastes, CO was employed as a reductant to transform PbSO 4 into PbS. Reaction system was established and reductive thermodynamics of PbSO 4 was calculated by software HSC 5.0. The effects of gas concentration...

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Published inJournal of Central South University Vol. 22; no. 8; pp. 2929 - 2935
Main Authors Zheng, Yong-xing, Liu, Wei, Qin, Wen-qing, Jiao, Fen, Han, Jun-wei, Yang, Kang, Luo, Hong-lin
Format Journal Article
LanguageEnglish
Published Changsha Central South University 01.08.2015
Subjects
Engineering
Metallic Materials
carbon monoxide
pyrometallurgy
lead sulfate
reduction
lead sulfide
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ISSN2095-2899
2227-5223
DOI10.1007/s11771-015-2828-8

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Summary:In order to decrease the solubility of PbSO 4 and enhance lead recovery from PbSO 4 bearing wastes, CO was employed as a reductant to transform PbSO 4 into PbS. Reaction system was established and reductive thermodynamics of PbSO 4 was calculated by software HSC 5.0. The effects of gas concentration, reaction temperature, time and mass of sample on reduction of PbSO 4 were examined by thermogravimetry (TG) and XRD. Roasting tests further verify the conclusions of thermodynamic and TG analyses. The results show that increasing temperature in the reasonable range and CO content are favorable for the formation of PbS. The reduction process is controlled by chemical reaction and calculation value of the activation energy is 47.88 kJ/mol.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-015-2828-8