Reduction of lead sulfate to lead sulfide with carbon monoxide  

作　　者：郑永兴 刘维 覃文庆 焦芬 韩俊伟 杨康 罗虹霖 

机构地区：[1]School of Minerals Processing and Bioengineering, Central South University

出　　处：《Journal of Central South University》2015年第8期2929-2935,共7页中南大学学报（英文版）

基　　金：Project(51204210)supported by the National Natural Science Foundation of China;Project(2011AA061001)supported by the National High Technology Research and Development Program of China;Project(2012BAC12B04)supported by the National Science and Technology Pillar Program during the Twelfth Five-Year Plan of China

摘　　要：In order to decrease the solubility of PbSO4 and enhance lead recovery from PbSO4 bearing wastes, CO was employed as a reductant to transform PbSO4 into Pb S. Reaction system was established and reductive thermodynamics of PbSO4 was calculated by software HSC 5.0. The effects of gas concentration, reaction temperature, time and mass of sample on reduction of PbSO4 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 Pb S. The reduction process is controlled by chemical reaction and calculation value of the activation energy is 47.88 k J/mol.In order to decrease the solubility of PbSO4 and enhance lead recovery from PbSO4 bearing wastes, CO was employed as a reductant to transform PbSO4 into Pb S. Reaction system was established and reductive thermodynamics of PbSO4 was calculated by software HSC 5.0. The effects of gas concentration, reaction temperature, time and mass of sample on reduction of PbSO4 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 Pb S. The reduction process is controlled by chemical reaction and calculation value of the activation energy is 47.88 k J/mol.

关 键 词：lead sulfate REDUCTION carbon monoxide lead sulfide PYROMETALLURGY 

分 类 号：TQ134.33[化学工程—无机化工] TF645[冶金工程—钢铁冶金]