Cleaner extraction of lead from complex lead-containing wastes by reductive sulfur-fixing smelting with low SO 2 emission

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorLi, Yun
dc.contributor.authorYang, Shenghai
dc.contributor.authorLin, Wenrong
dc.contributor.authorTaskinen, Pekka
dc.contributor.authorHe, Jing
dc.contributor.authorWang, Yuejun
dc.contributor.authorShi, Junjie
dc.contributor.authorChen, Yongming
dc.contributor.authorTang, Chaobo
dc.contributor.authorJokilaakso, Ari
dc.contributor.departmentDepartment of Chemical and Metallurgical Engineering
dc.contributor.departmentCentral South University
dc.contributor.departmentHetao College
dc.date.accessioned2019-04-02T06:53:31Z
dc.date.available2019-04-02T06:53:31Z
dc.date.issued2019-02-01
dc.description.abstractA novel and cleaner process for lead and silver recycling from multiple lead-containing wastes, e.g., lead ash, lead sludge, lead slag, and ferric sludge, by reductive sulfur-fixing smelting was proposed. In this process, coke and iron-containing wastes were employed as reductive agent and sulfur-fixing agent, respectively. A Na 2 CO 3 -Na 2 SO 4 mixture was added as flux. The feasibility of this process was detected from thermodynamic and experimental perspectives. The influence of Fe/SiO 2 and CaO/SiO 2 , composition of the molten salt, coke addition, smelting temperature, and smelting time on direct Pb recovery and sulfur-fixation efficiency were investigated. The optimal process conditions were determined as follows: W Coke = 15%W Pb wastes ,W Na2CO3 /W Na2SO4 = 0.7/0.3, Fe/SiO2 = 1.10, CaO/SiO 2 = 0.30, smelting temperature 1200 °C, and smelting time 2 h, where W represents weight. Under these optimum conditions, 92.4% Pb and 98.8% Ag were directly recovered in crude lead bullion in one step treatment, and total 98.6% sulfur was fixed. The generation and emissions of SO2 can be avoided. The main phases in ferrous matte obtained were FeS, NaFeS 2 , Fe 2 Zn 3 S 5 , and a little entrained Pb. The slag was a FeO-SiO 2 -CaO-Na 2 O quaternary melt.en
dc.description.versionPeer revieweden
dc.format.mimetypeapplication/pdf
dc.identifier.citationLi , Y , Yang , S , Lin , W , Taskinen , P , He , J , Wang , Y , Shi , J , Chen , Y , Tang , C & Jokilaakso , A 2019 , ' Cleaner extraction of lead from complex lead-containing wastes by reductive sulfur-fixing smelting with low SO 2 emission ' , Minerals , vol. 9 , no. 2 , 119 . https://doi.org/10.3390/min9020119en
dc.identifier.doi10.3390/min9020119
dc.identifier.issn2075-163X
dc.identifier.otherPURE UUID: 4c2d35e4-7eb3-410c-b699-838d94bbde6e
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/4c2d35e4-7eb3-410c-b699-838d94bbde6e
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85062827547&partnerID=8YFLogxK
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/32690863/CHEM_Li_Yun_et_al_Cleaner_extraction_of_lead_2019_Minerals.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/37297
dc.identifier.urnURN:NBN:fi:aalto-201904022428
dc.language.isoenen
dc.publisherMDPI AG
dc.relation.ispartofseriesMineralsen
dc.relation.ispartofseriesVolume 9, issue 2en
dc.rightsopenAccessen
dc.subject.keywordLead recycling
dc.subject.keywordLead-iron-containing wastes
dc.subject.keywordMolten salt
dc.subject.keywordPbO-FeO-SiO -CaO-Na O phase diagram
dc.subject.keywordSO -free sulfur fixing smelting
dc.subject.keywordWastes co-treatment and recycling
dc.titleCleaner extraction of lead from complex lead-containing wastes by reductive sulfur-fixing smelting with low SO 2 emissionen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
Files