PREG-ROBBING OF GOLD IN CHLORIDE-BROMIDE SOLUTION

被引：12

作者：

Ahtiainen, Riina ^{[1
]}

Lundstrom, Mari ^{[2
]}

机构：

[1] Outotec Finland Oy, Poznan, Poland

[2] Aalto Univ, Sch Chem Technol, Dept Mat Sci & Engn, Helsinki, Finland

来源：

PHYSICOCHEMICAL PROBLEMS OF MINERAL PROCESSING | 2016年 / 52卷 / 01期

关键词：

gold; leaching; pre-robbing; hydrometallurgy; carbon;

D O I：

10.5277/ppmp160121

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

One of the major issue in gold chloride leaching is a tendency of gold to either precipitate or adsorb on a carbonaceous matter in an ore, i.e. preg-robbing. This paper discusses issues related to a pregrobbing phenomenon in gold hydrometallurgy, specifically in gold chloride-bromide leaching. This phenomenon has been observed in the 1800s to decrease gold recovery during gold chlorination as well as the state-of-art of gold cyanidation processes. The experiments were conducted in order to study the pregrobbing phenomenon in chloride-bromide media. The tendency of preg-robbing was demonstrated by adding carbon in a non-preg-robbing ore. It was shown that the preg-robbing tendency in the chloride-bromide media was very strong. Addition of 0.01% w/w of carbon powder into the non-preg-robbing ore decreased gold recovery from 92 to 70% and addition 5% w/w of carbon decreased gold recovery to almost zero.

引用

页码：244 / 251

页数：8

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