Development and evaluation of an early removal process for the beneficiation of arsenic-bearing copper ores

Bruckard, Warren J.; Davey, K.J.; Jorgensen, F. R. A.; Wright, Steven; Brew, D. R. M.; Haque, Nawshad; Vance, E. R.

doi:10.1016/j.mineng.2010.03.015

Cited by 56 publications

(26 citation statements)

References 10 publications

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“…One accepted method is to produce two products by flotation; one high copper/low arsenic, which can be treated safely by smelting and a second product, high arsenic/low copper, which can be treated safely by special pyro-or hydro-metallurgical routes. These latter processes will also deliver the arsenic in a manageable product [5,6]. Recent research studies have been focused on the possibility for separation of arsenic-bearing copper minerals (enargite and tennantite) from other copper sulphides using froth flotation [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Recent research studies have been focused on the possibility for separation of arsenic-bearing copper minerals (enargite and tennantite) from other copper sulphides using froth flotation [5][6][7][8][9]. Controlled pulp potential (Eh) flotation was found to be a prospective approach to promote the separation of the arsenic-copper minerals from the other copper sulphides due to the strong Eh dependence of arsenic mineral flotation [5][6][7][8][10][11][12][13][14][15]. However it has been identified that the efficiency of the separation strongly depends on the mineralogical characteristics of the ore samples [6,[16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Relating the Mineralogical Characteristics of Tampakan Ore to Enargite Separation

2017

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Abstract:The mineralogical characteristics of enargite-bearing copper ores from the Tampakan deposit have been investigated as the means to understanding the separation of enargite from other copper sulphides (chalcopyrite and bornite). It was found that a separation of these minerals was possible after grinding the ore samples to a P 80 of 90 microns; enargite tends to be ground more readily than the other copper sulphide minerals present in ore samples tested, and consequently, it mostly reported to the fine size fractions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Relating the Mineralogical Characteristics of Tampakan Ore to Enargite Separation

2017

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“…It was found that controlled pulp potential (Eh) flotation is a prospective approach to promote the separation of arsenic-copper minerals from other copper sulphides due to the strong Eh dependence of arsenic mineral flotation (Menacho et al, 1993, Yen and Tajadod, 2000, Kantar, 2002, Guo and Yen, 2005, Senior et al, 2006, Smith and Bruckard, 2007, Bruckard et al, 2010, Haga et al, 2012a, Haga et al, 2012b.…”

Section: List Of Figuresmentioning

confidence: 99%

“…Flotation separation of arsenic-bearing copper sulphides from other copper sulphides has also been studied since these minerals have similar flotation properties to copper sulphide minerals. Research on separation of arsenic-bearing copper sulphides from other copper sulphides, by flotation, indicated that Eh control has shown promising results for eliminating arsenic from other copper sulphides, due to the strong Eh dependence of arsenic mineral flotation (Menacho et al, 1993, Yen and Tajadod, 2000, Kantar, 2002, Guo and Yen, 2005, Senior et al, 2006, Smith and Bruckard, 2007, Bruckard et al, 2010, Haga et al, 2012a, Haga et al, 2012b, Ruiz et al, 2013. Menacho et al (1993) were the first to demonstrate that the separation of enargite from chalcopyriteenargite ore is possible by pulp potential control.…”

Section: Selective Flotation Using Pulp Potential (E H ) Controlmentioning

confidence: 99%

“…A hydrometallurgical step is an alternative option to the roasting step in the initial arsenic removal process. In this case, the high-arsenic lowcopper concentrate is leached with alkaline sulphide (a mixture of NaOH and Na2S) to dissolve the arsenic selectively leaving a copper-rich leach residue ( The flowsheet has been sequentially tested in the laboratory at small scale (Bruckard et al, 2010).…”

Section: Selective Flotation Using Pulp Potential (E H ) Controlmentioning

confidence: 99%

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Selective flotation of enargite from copper sulphides in complex ore systems

Tayebi-Khorami¹

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Recent research has demonstrated promising results showing the possibility of separating arseniccopper sulphides from other copper minerals by controlling the potential of the flotation pulp. Most of these studies were conducted on single mineral systems, and the selective removal of arseniccopper minerals in real ore systems is not well understood. In real ore systems, the efficiency of the separation strongly depends on the mineralogical characteristics of the ore samples. This study seeks to understand the effect of ore mineralogy on the floatability of enargite in a complex ore system, under a controlled potential flotation environment.A composite of several high arsenic-containing drill core intersections for the high arsenic sample (HAS) and a composite of some low arsenic-containing drill core intersections for the low arsenic sample (LAS) were selected from the Tampakan copper-gold deposit in the Philippines, providing a range of arsenic levels. Arsenic in the HAS sample (enargite) was practically twice that for the LAS sample. The non-enargite copper minerals (NECu) were mostly chalcopyrite and bornite in both samples.Comprehensive size-by-size, chemical and mineralogical analyses were performed on both ore samples. It was observed that the two ore samples had similar mineralogical characteristics in terms of mineral content and liberation distribution, however there are some differences in the proportions of minerals. It was also observed that NECu minerals were mostly distributed to the coarser size fractions, while the proportion of enargite in the finer size fractions was higher than for NECu. The mineral grain size data showed that enargite had the finest grain size distribution compared to other copper minerals.The selective separation of enargite from NECu minerals in a rougher flotation system under controlled pulp potential was investigated for both samples. It was observed that it is possible to selectively separate enargite from other copper minerals after reducing the pulp potential to about -200 mV SHE at pH 11 in the LAS sample. However, no separation between enargite and NECu minerals was observed at a reducing potential for the HAS sample, and enargite did not float very well for this sample as the Eh was changed.The Particle Kinetic Model was used to predict the flotation response of enargite and NECu in the HAS sample based on mineral flotation rates derived from the LAS sample and the mineralogy of the HAS sample. It was observed that the predicted values of enargite recoveries were higher in the HAS sample when compared with the results of actual flotation tests. As the mineralogy of the two ore samples was similar in terms of mineralogical and liberation characteristics, the only reason for the iii poor prediction of the model for the HAS sample was due to the change in the flotation pulp conditions for the HAS sample. There were two possible reasons for this change in the flotation response of the HAS sample. One was the higher levels of pyrite present in the HAS sample com...

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