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

Simple item page
dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorAhtiainen, Riina
dc.contributor.authorLundström, Mari
dc.contributor.authorLiipo, Jussi
dc.contributor.departmentSchool services, CHEM
dc.contributor.departmentDepartment of Chemical and Metallurgical Engineering
dc.contributor.departmentOutotec Oyj
dc.date.accessioned2018-10-02T11:31:43Z
dc.date.available2018-10-02T11:31:43Z
dc.date.embargoinfo:eu-repo/date/embargoEnd/2020-09-01
dc.date.issued2018-11-01
dc.description.abstractThe 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.description.versionPeer revieweden
dc.format.extent7
dc.format.extent153-159
dc.format.mimetypeapplication/pdf
dc.identifier.citationAhtiainen , R , Lundström , M & Liipo , J 2018 , ' Preg-robbing verification and prevention in gold chloride-bromide leaching ' , Minerals Engineering , vol. 128 , pp. 153-159 . https://doi.org/10.1016/j.mineng.2018.08.037en
dc.identifier.doi10.1016/j.mineng.2018.08.037
dc.identifier.issn0892-6875
dc.identifier.issn1872-9444
dc.identifier.otherPURE UUID: d3a4a6ea-2c4d-49cf-8bd7-a1010cd72892
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/d3a4a6ea-2c4d-49cf-8bd7-a1010cd72892
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85052648410&partnerID=8YFLogxK
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/27984349/CHEM_Ahtiainen_Preg_robbing_Metallurgical_Engineering.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/34133
dc.identifier.urnURN:NBN:fi:aalto-201810025216
dc.language.isoenen
dc.relation.ispartofseriesMinerals Engineeringen
dc.relation.ispartofseriesVolume 128en
dc.rightsopenAccessen
dc.subject.keywordBlinding
dc.subject.keywordChloride
dc.subject.keywordChlorination
dc.subject.keywordGold
dc.subject.keywordPreg-robbing
dc.titlePreg-robbing verification and prevention in gold chloride-bromide leachingen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
Files
Collections
[article-cris] Kemian tekniikan korkeakoulu / CHEM