Oxidative weathering of a copper sulphide ore and its influence on pulp chemistry and flotation

[en] The influence of grinding chemistry on the flotation behaviour of sulphides minerals has been widely studied. However, its influence on partially oxidised sulphide ores is not well documented. Various oxidation events can affect a sulphide ore, either during in situ weathering of an ore body or during the different extraction and processing stages (mining operations, stockpiling, crushing, milling and flotation). In this study, a hypogene copper sulphide ore was artificially oxidised to various lengths of time by percolating a small quantity of acidic ferric sulphate solution inoculated with a mixed bacterial culture through packed columns. For each time interval a series of grinding-flotation tests using different grinding media alloys was completed. The grinding and flotation chemistry were compared and linked to the flotation behaviour of the ore samples. The results reveal that as oxidation progressed the copper metallurgy deteriorated. However, the deleterious effects of oxidation could be partially overcome through the application of the right grinding chemistry.

Disciplines :

Geological, petroleum & mining engineering

Author, co-author :

Jacques, S.; Magotteaux Andino SA

Greet, C.J.; Magotteaux Australia Pty

Bastin, David ; Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo

Language :

English

Title :

Oxidative weathering of a copper sulphide ore and its influence on pulp chemistry and flotation

Publication date :

2016

Journal title :

Minerals Engineering

ISSN :

0892-6875

Publisher :

Pergamon Press - An Imprint of Elsevier Science, Oxford, United Kingdom

Volume :

Pages :

52-59

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 08 December 2017

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