Selective depression mechanism of ferric chromium lignin sulfonate for chalcopyrite–galena flotation separation
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第5期
论文作者：Jin-sheng Yu Run-qing Liu Li Wang Wei Sun Hong Peng Yue-hua Hu
文章页码：489 - 497
摘 要：Selective recovery of chalcopyrite–galena ore by flotation remains a challenging issue.The development of highly efficient,low-cost,and environmentally friendly depressants for this flotation is necessary because most of available reagents（e.g.,K2Cr2O4）are expensive and adversely affect the environment.In this study,ferric chromium lignin sulfonate（FCLS）,which is a waste-product from the paper and pulp industry,was introduced as a selective depressant for galena with butyl xanthate（BX）as a collector.Results show that the residue recovery of Pb in Cu concentrate was substantially reduced to 4.73%using FCLS compared with 10.71%using the common depressant K2Cr2O4.The underlying mechanisms were revealed using zeta-potential measurements and X-ray photoelectron spectroscopy（XPS）.Zeta-potential measurements revealed that FCLS was more efficiently absorbed onto galena than onto chalcopyrite.XPS measurements further suggested that FCLS enhanced the surface oxidation of galena but prevented that of chalcopyrite.Thus,FCLS could be a potential candidate as a depressant for chalcopyrite–galena flotation because of its low cost and its lack of detrimental effects on the environment.
Jin-sheng Yu1，Run-qing Liu1，Li Wang1，Wei Sun1，Hong Peng2，Yue-hua Hu1
1. School of Minerals Processing and Bioengineering,Central South University2. School of Chemical Engineering,The University of Queensland
摘 要：Selective recovery of chalcopyrite–galena ore by flotation remains a challenging issue.The development of highly efficient,low-cost,and environmentally friendly depressants for this flotation is necessary because most of available reagents（e.g.,K2Cr2O4）are expensive and adversely affect the environment.In this study,ferric chromium lignin sulfonate（FCLS）,which is a waste-product from the paper and pulp industry,was introduced as a selective depressant for galena with butyl xanthate（BX）as a collector.Results show that the residue recovery of Pb in Cu concentrate was substantially reduced to 4.73%using FCLS compared with 10.71%using the common depressant K2Cr2O4.The underlying mechanisms were revealed using zeta-potential measurements and X-ray photoelectron spectroscopy（XPS）.Zeta-potential measurements revealed that FCLS was more efficiently absorbed onto galena than onto chalcopyrite.XPS measurements further suggested that FCLS enhanced the surface oxidation of galena but prevented that of chalcopyrite.Thus,FCLS could be a potential candidate as a depressant for chalcopyrite–galena flotation because of its low cost and its lack of detrimental effects on the environment.
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