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

Tutkimustuotos: Lehtiartikkeli

Standard

Preg-robbing verification and prevention in gold chloride-bromide leaching. / Ahtiainen, Riina; Lundström, Mari; Liipo, Jussi.

julkaisussa: Minerals Engineering, Vuosikerta 128, 01.11.2018, s. 153-159.

Tutkimustuotos: Lehtiartikkeli

Harvard

APA

Vancouver

Author

Bibtex - Lataa

@article{d3a4a6ea2c4d49cf8bd7a1010cd72892,
title = "Preg-robbing verification and prevention in gold chloride-bromide leaching",
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.",
keywords = "Blinding, Chloride, Chlorination, Gold, Preg-robbing",
author = "Riina Ahtiainen and Mari Lundstr{\"o}m and Jussi Liipo",
year = "2018",
month = "11",
day = "1",
doi = "10.1016/j.mineng.2018.08.037",
language = "English",
volume = "128",
pages = "153--159",
journal = "Minerals Engineering",
issn = "0892-6875",

}

RIS - Lataa

TY - JOUR

T1 - Preg-robbing verification and prevention in gold chloride-bromide leaching

AU - Ahtiainen, Riina

AU - Lundström, Mari

AU - Liipo, Jussi

PY - 2018/11/1

Y1 - 2018/11/1

N2 - 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.

AB - 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.

KW - Blinding

KW - Chloride

KW - Chlorination

KW - Gold

KW - Preg-robbing

UR - http://www.scopus.com/inward/record.url?scp=85052648410&partnerID=8YFLogxK

U2 - 10.1016/j.mineng.2018.08.037

DO - 10.1016/j.mineng.2018.08.037

M3 - Article

VL - 128

SP - 153

EP - 159

JO - Minerals Engineering

JF - Minerals Engineering

SN - 0892-6875

ER -

ID: 27963258