Preg-robbing of gold in chloride-bromide solution

• Autorzy: Ahtiainen R. , Lundstrom M.

Identyfikatory

DOI

10.5277/ppmp160121

• Języki publikacji: EN

Abstrakty

EN

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 preg-robbing 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 preg-robbing 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.

Słowa kluczowe

EN

gold; leaching; pre-robbing; hydrometallurgy; carbon

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2016
• Tom: Vol. 52, iss. 1
• Strony: 244--251
• Opis fizyczny: Bibliogr. 16 poz., rys., tab.

Twórcy

autor

Ahtiainen R.

• Outotec (Finland) Oy

autor

Lundstrom M.

• Aalto University, School of Chemical Technology, Department of Materials Science and Engineering

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą nauki