Preg-robbing verification and prevention in gold chloride-bromide leaching

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Ahtiainen, Riina Lundström, Mari Liipo, Jussi 2018-10-02T11:31:43Z 2018-10-02T11:31:43Z 2018-11-01
dc.identifier.citation Ahtiainen , R , Lundström , M & Liipo , J 2018 , ' Preg-robbing verification and prevention in gold chloride-bromide leaching ' Minerals Engineering , vol 128 , pp. 153-159 . DOI: 10.1016/j.mineng.2018.08.037 en
dc.identifier.issn 0892-6875
dc.identifier.issn 1872-9444
dc.identifier.other PURE UUID: d3a4a6ea-2c4d-49cf-8bd7-a1010cd72892
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
dc.description.abstract The use of cyanide is becoming more challenging due to the related environmental risks, increasing the interest in cyanide-free gold leaching. Chloride-bromide leaching is one of the widely investigated alternative lixiviants for gold recovery. However, gold is known to adsorb or precipitate readily on the carbonaceous matter present in the ore, being one of the challenges in chloride process development. The current study presents an equation indicating gold loss due to preg-robbing into solids in chloride-bromide media. The equation was verified using a naturally preg-robbing gold concentrate. It was shown that the graphite naturally present in gold ore can be an equally active preg-robbing agent for gold chloride complex as industrially manufactured and commercially available activated carbon. In order to study preg-robbing prevention during gold leaching in chloride-bromide media, carbon blinding, and Cl2-pretreatment were applied. Blinding with ShellSol D70 was shown to improve gold recovery only slightly whereas Cl2-pretreatment was shown to increase gold recovery from 2% to 45% for a naturally preg-robbing gold concentrate. en
dc.format.extent 7
dc.format.extent 153-159
dc.language.iso en en
dc.relation.ispartofseries Minerals Engineering en
dc.relation.ispartofseries Volume 128 en
dc.rights embargoedAccess en
dc.subject.other Control and Systems Engineering en
dc.subject.other Chemistry(all) en
dc.subject.other Geotechnical Engineering and Engineering Geology en
dc.subject.other Mechanical Engineering en
dc.subject.other 216 Materials engineering en
dc.subject.other environmental technology en
dc.title Preg-robbing verification and prevention in gold chloride-bromide leaching en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department School services, CHEM
dc.contributor.department Department of Chemical and Metallurgical Engineering
dc.contributor.department Outotec Oyj
dc.subject.keyword Blinding
dc.subject.keyword Chloride
dc.subject.keyword Chlorination
dc.subject.keyword Gold
dc.subject.keyword Preg-robbing
dc.subject.keyword Control and Systems Engineering
dc.subject.keyword Chemistry(all)
dc.subject.keyword Geotechnical Engineering and Engineering Geology
dc.subject.keyword Mechanical Engineering
dc.subject.keyword 216 Materials engineering
dc.subject.keyword environmental technology
dc.identifier.urn URN:NBN:fi:aalto-201810025216
dc.identifier.doi 10.1016/j.mineng.2018.08.037 info:eu-repo/date/embargoEnd/2020-09-01

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