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

 |  Login

Show simple item record

dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Li, Yun Yang, Shenghai Lin, Wenrong Taskinen, Pekka He, Jing Wang, Yuejun Shi, Junjie Chen, Yongming Tang, Chaobo Jokilaakso, Ari 2019-04-02T06:53:31Z 2019-04-02T06:53:31Z 2019-02-01
dc.identifier.citation Li , 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 . en
dc.identifier.issn 2075-163X
dc.identifier.other PURE UUID: 4c2d35e4-7eb3-410c-b699-838d94bbde6e
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
dc.identifier.other PURE FILEURL:
dc.description.abstract A 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.format.mimetype application/pdf
dc.language.iso en en
dc.publisher MDPI AG
dc.relation.ispartofseries Minerals en
dc.relation.ispartofseries Volume 9, issue 2 en
dc.rights openAccess en
dc.subject.other Geotechnical Engineering and Engineering Geology en
dc.subject.other Geology en
dc.subject.other 215 Chemical engineering en
dc.title Cleaner extraction of lead from complex lead-containing wastes by reductive sulfur-fixing smelting with low SO 2 emission en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Chemical and Metallurgical Engineering
dc.contributor.department Central South University
dc.contributor.department Hetao College
dc.subject.keyword Lead recycling
dc.subject.keyword Lead-iron-containing wastes
dc.subject.keyword Molten salt
dc.subject.keyword PbO-FeO-SiO -CaO-Na O phase diagram
dc.subject.keyword SO -free sulfur fixing smelting
dc.subject.keyword Wastes co-treatment and recycling
dc.subject.keyword Geotechnical Engineering and Engineering Geology
dc.subject.keyword Geology
dc.subject.keyword 215 Chemical engineering
dc.identifier.urn URN:NBN:fi:aalto-201904022428
dc.identifier.doi 10.3390/min9020119
dc.type.version publishedVersion

Files in this item

Files Size Format View

There are no open access files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search archive

Advanced Search

article-iconSubmit a publication


My Account