A1 Journal article (refereed), original research

Xanthate degradation occurring in flotation process waters of a gold concentrator plant


Publication Details
Authors: Kemppinen Jussi, Aaltonen Annukka, Sihvonen Tuomas, Leppinen Jaakko, Sirén Heli
Publisher: Elsevier
Publication year: 2015
Language: English
Volume number: 80
ISSN: 0892-6875
JUFO level of this publication: 2
Open Access: Not an Open Access publication

Abstract

Xanthates enhance the separation of
valuable metals from minerals in hydrometallurgical processes. They
degrade to structurally related decomposition products under the
chemical and physical conditions in flotation processes, which minimizes
the extraction recovery of metals. To monitor low quantities of the
decomposition products, the flotation process requires sensitive,
qualitative, or even quantitative controlling.

The
goal of the present research was to develop a sensitive separation
method for on-line monitoring of the degradation of collector chemicals
in the waters of a gold concentrator plant. To that end, an on-line
coupling of capillary electrophoresis with a pressure-assisted
field-amplified sample injection (PA-FASI) was developed. The purpose of
the overall system set-up was to fortify concentrations during sample
introduction in order to study xanthates and thiocarbonate directly in
flotation waters during the process. The system developed from these
methods was reliable and reproducible, enabling detection of below 10 mg L−1 quantities for ethyl and isobutyl xanthates as well as for isobutyl thiocarbonate.


Last updated on 2018-06-11 at 08:37