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 ...
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Potassium ethyl xanthate has been reported to have enhanced hydrophobicity and promotion of bubbles in the flotation of low-grade copper ore [10, 22]. It has been reported that the total loss of ...
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G. Poling, "Flotation of oxidised copper," Santiago, 1973. T. Deng and J. Chen, "Treatment of oxidised copper ores with emphasis on refractory ores," Mineral Processing and Extractive Metallurgy Review, vol. 7, no. 3-4, pp. 175-202, 1991. A. Mulaba and D. Bell, "Some aspects of laboratory flotation of Copper-Co minerals from mixed …
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The sample contained: 1.99 % Cu, 6.3 % Fe, 1.64 ppm Au, 8.57 ppm Ag, 13.9 ppm Pb, and 129 ppm Zn. After desliming, the flotation feed assayed 2.7% Cu having about 98% of the copper content in the ...
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The role played by base-metal ions in the sulfidisation of oxidised pentlandite surfaces was tested by adding either iron or copper ions either before sulfidisation or during sulfidisation at a sulfide ion potential of −650 mV.In the case where the base-metal ions were added prior to sulfidisation, the solution was adjusted to pH 9 and contacted with …
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Secondly, the direct leaching of improved PGM flotation recoveries from oxidized ore by using the oxidized PGM ore using aqua regia, HNO3, H2SO4, and HCL controlled potential sulphidization to restore the floatability of was also evaluated for PGM extraction. The concentrate from the oxidized pentlandite. Sulphidization is an aqueous process by ...
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These oxidised copper minerals are found in weathered regions of most copper sulphide ore bodies The overlaying oxidic ore …
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For copper ores with oxidation rates of up to 94%, flotation tests have been performed by sulfidization-xanthate flotation, 2,5-dithiol-1,3,4-thiodiazole flotation, and sulfidization-2,5-dithiol-1,3,4 thiodiazole–xanthate flotation.
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At present, the treatment methods for copper oxide ore mainly include flotation, 5, 6 leaching 7, 8 and flotation and metallurgical processes. 9 The flotation …
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The preferred method for the flotation of oxide and mixed copper ores is sulphidisation. The reagents are typically sodium sulphide (Na 2 S) and sodium …
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A Copper Flotation Flowsheet. Because the copper in this type of ore usually assays only plus or minus 1% copper, the porphyry copper operations must be relatively large in order to be commercial. The flowsheet in this study illustrates a typical 3,000 ton per day operation. In general most operations of this type have two or more …
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Effect of Alteration on the Mineralogy and Flotation Performance of PPM Platinum Ore. The 2.05-Ga Bushveld Complex in South Africa, host to many lucrative ore deposits (e.g. platinum group elements (PGE)), is surprisingly pristine and unaltered, given its geological age. In some….
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The flotation by surface sulphidisation of the oxidized copper-cobalt-bearing ore from Kimpe (1.97% Cu; 0.66% Co) was studied in order to evaluate its behavior by the analysis of its most ...
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2023/05/01. Numerous copper flotation plants have to use high salinity water, but high salinity water is detrimental to copper flotation by promoting copper activation on pyrite. Despite the effective depression of pyrite by the combined use of sodium metabisulfite (MBS, NaSO) and Hi-Cr steel grinding media in high salinity water, many copper ...
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The first attempts for using hydroxamates in the flotation of Cu–Co oxidised ore in Katanga date back to1971 at the Kamoto Concentrator (Lualaba). They were used in combination with xanthates during the flotation of oxidised ores and significant improvements in the selectivity and recovery of Cu–Co were observed (Evrard & De …
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Copper oxide ore has a complex composition, and a low recovery rate is often achieved via the traditional sorting method. A new combined process of flotation–high-gradient magnetic separation–leaching is proposed here to recover copper minerals. The test results showed that the flotation process was successful when using …
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For each flotation test, one kg of the crushed ore has been subjected to wet grinding in ball mill for obtaining granulometry of d 80 of 74 μm and flotation pulp with specific gravity of 1200 g/L. The ore has been initially subjected to talc pre-flotation during 3 min followed by copper–cobalt bulk rougher for 30 min.The talc pre-flotation has …
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The oxidised starch with the larger molecular weight structures depressed copper-activated pyrite best, and the oxidised starch with lower molecular weight structures was better at depressing graphite. ... To improve relevance to real ore applications, flotation conditions for the graphite system are based upon information …
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In this study, flotation of oxidised ores rich in copper and cobalt from Mupine deposit in the Democratic Republic of Congo had been investigated. This ore contains 4.85% copper, 0.16% cobalt.
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The flotation concentrate is then dewatered and filtered to produce a filter cake that is sent to a copper smelter. Copper processing - Ores, Refining, Smelting: Principal forms in which copper ores are found include native copper, porphyry copper, massive deposits, and mixed ores. Native copper is simply the metal found unadulterated in nature.
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of minerals, association of gangue mineral slimes and the presence of oxidised copper minerals pose special problems in designing the flotation process and achieving the desired results [1-3]. The present paper deals with the results of characterisation and flotation studies carried out a low grade complex copper ore sample
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with the results of characterisation and flotation studies carried out a low grade complex copper ore sample with a view to design process for its concentration to a product suitable for extraction of metal. EXPERIMENTAL The copper ore sample used for the studies assayed 0.95% Cu with 80.46% SiO2 and 9.55% A1,03.
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Results from lab scale flotation show that when process water was re-used copper and cobalt recovery from an oxidized ore decreased respectively with 25% and 30% at the rougher stage bringing lower grade concentrate as well. The presence of thiosulphate ions contributed to slow down of NaHS consumption during sulphidisation …
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cooper and can float oxidised/oxide copper minerals. Figure 6: Effect of Sodium Sulphide on Copper Recovery Cleaning Flotation and Process Flow- Sheet Having established the process conditions for rougher flotation, cleaning flotation experiments were carried out to improve quality of copper concentrate. Further the results of bench scale flotation
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Republic of Congo (DRC) from ores containing copper-cobalt oxides or copper-cobalt sulphides. Where oxide and sulphide cobalt-bearing copper minerals occur together, efficient recovery of copper and cobalt is known to be extremely difficult. This study investigates the flotation behaviour of a mixed oxide-sulphide ore where copper is
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highest recovery of copper (44.80%) and cobalt (88.30%) through flotation of the stu died tailings. Based. on both the achievable recovery of the metals of interest and the concentrate grade (3. ...
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The oxidised sulphide ore was studied by artificially oxidising a copper sulphide ore to various states during 16 months. For each oxidation state, the effect of chemistry was studied through a series of grinding and flotation …
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It was found that the flotation of oxidised pentlandite could be successfully restored by the addition of iron and copper ions during sulfidisation, resulting in the formation of iron and copper sulfides on the oxidised pentlandite 1046 A.J.H. Newell, D.J. Bradshaw / Minerals Engineering 20 (2007) 1039–1046 surfaces, particularly at ...
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The objective of this study was to investigate the floatability of a complex Kansanshi mixed copper ore with a special focus on the sulphidisation process. Controlled potential sulphidisation (CPS) is preferred over slug sulphidisation as the industry standard for the flotation of oxide copper minerals. Two potential ranges were investigated in ...
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The flotation by surface sulphidisation of the oxidized copper-cobalt-bearing ore from Kimpe (1.97% Cu; 0.66% Co) was studied in order to evaluate its behavior by the analysis of its most ...
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Lee et al. (2009) using AM 28 in a mixture with a traditional xanthate collector in laboratory-scale batch flotation tests achieved copper recoveries from a sulfide/oxide ore blend (containing chalcopyrite, bornite, chalcocite, malachite) which were superior to those obtained using xanthate only after controlled potential sulfidisation (CPS).
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(CuO.SiO₂). These oxidised copper minerals are found in weathered regions of most copper sulphide ore bodies The overlaying oxidic ore is usually stockpiled after it is removed from the sulphide lode and left unprocessed as the sulphide ore is simpler to recover by conventional flotation procedures and thus, more attractive to the plant …
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