Article (Scientific journals)
Malachite and heterogenite behavior during the locked-cycle recycling of process water in flotation of copper-cobalt oxide ores
Shengo, Michel; Gaydardzhiev, Stoyan; Kalenga, Pierre
2016In International Journal of Mineral Processing, 157, p. 152-162
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Keywords :
flotation; copper-cobalt ores; process waters
Abstract :
[en] The behavior of malachite and heterogenite was investigated during the process water recycling in flotation of copper-cobalt oxide ores from the deposit of Luiswishi located in Haut-Katanga province (DRC). A synthetic mill wastewater (SMWW) was utilized as feed water alone and in mixture with water recovered from the flotation tails in view to achieve at the laboratory scale the locked-cycle recycling of the industrial mill wastewater (IMWW). To simulate the chemical species presence in the pulp and their effects on the flotation of malachite and heterogenite, calcium, magnesium and bicarbonate ions were added to the feed water and the recoveries of copper and cobalt followed during the roughing flotation stage. The concentrate XRD and SEM analysis together with the floated minerals microanalyses by EDX spectroscopy, leaching tests of mono-minerals followed by the Pourbaix diagrams construction and DRIFT spectroscopy analyses, have enabled identifying changes in the surface properties of malachite and heterogenite interfering on the recovery of copper (40 %) and cobalt (58 %) with a significant drop in their concentrate grades (7.3 % Cu and 2.7 % Co). The deterioration of the concentrate characteristics results also from the gangue minerals entrainment. A better description of the valuable minerals behaviour in the SMWW presence could enable designing strategies in view enhancing their floatability during the locked-cycle recycling of water.
Disciplines :
Geological, petroleum & mining engineering
Author, co-author :
Shengo, Michel;  Université de Lubumbashi
Gaydardzhiev, Stoyan  ;  Université de Liège > Département ArGEnCo > Traitement et recyclage des matières minérales
Kalenga, Pierre;  Université de Lubumbashi
Language :
English
Title :
Malachite and heterogenite behavior during the locked-cycle recycling of process water in flotation of copper-cobalt oxide ores
Publication date :
10 November 2016
Journal title :
International Journal of Mineral Processing
ISSN :
0301-7516
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
157
Pages :
152-162
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 30 October 2016

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