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It has been claimed that when treating copper-gold ores, Aero 7249 Promotor (a monothio phosphate) gives better recovery of native gold (Hartati et al., 1997) and better selectivity of gold over sulphide minerals (Forrest et al., 2001). 946 G. C. Allan and J. T. Woodcock Other possibilities include the use of soda ash circuits for pH control ...
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1. Introduction. The flotation process is a separation technique primarily used in mineral processing for the recovery of minerals (Wills and Finch, 2016), that also finds application in other industrial processes such as wastewater treatment and paper recycling (Saththasivam et al., 2016, Vashisth et al., 2011).Separation of mineral particles by …
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The presence of gold in porphyry copper ores may require specific flotation strategies to ensure optimum recovery of both Au and Cu, which may differ according to gold mineralogy. Native gold generally floats well with the collectors used for the Cu sulphides (e.g., xanthates, dithiophosphates). However, when Au is mineralogically …
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The aim of the testwork was to optimise the free gold recovery by; (1) enhancing the copper and gold recovery into a copper concentrate and (2) floating the gold away from the copper sulphides and pyrite. The ore was crushed to -2 mm and ground in a stainless steel laboratory rod mill to a p80 of 106 ~tm for the flotation tests.
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Flotation of copper–gold ores. For the bulk flotation of copper minerals and gold from supergene copper ores, it is normal practice to add a xanthate as the primary …
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Magnetic conditioning of flotation feed has been shown to improve the flotation of <38 μm paramagnetic minerals consistent with selectively aggregating these …
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The processing of gold-copper ores (higher values of gold than copper) typically follows the route of cyanidation, whereas for copper-gold ores (higher copper than gold values) …
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Tests made on ore containing $9 gold, 3.5% copper, and 45% insoluble, showed that after crushing to pass 60 mesh and treating …
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The flowsheet in this study was designed to treat 500 tons per day of a complex base metal ore containing gold and silver values. The presence of free gold offers opportunity to recover these values in the grinding circuit so that the gold could be amalgamated, and marketed directly to the mint. The ore as ...
6.1 Iron Sulphide Gold Ores 22 6.2 Copper Ores 22 6.3 Low Grade Copper-Gold Ores 23 6.4 Lead-Zinc Ores 24 6.5 Copper-Zinc Ores 24 6.6 Copper-Lead-Zinc Ores 25 6.7 Nickel Ores 26 Planning and Analysis of Flotation Reagent Plant Trials Using the Paired t-test 27 Xanthate Determination Procedures 33
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Problem with gold recovery from sulphide ore: How may a mill get the maximum recovery of gold from a sulphide ore, at the least capital cost and at the same time obtain the highest net return. This latter point is most important. In many cases a gold mill using an all-cyanide flowsheet with fine grinding of ... Gold Ore …
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Copper processing is a complicated process that begins with mining of the ore (less than 1% copper) and ends with sheets of 99.99% pure copper called cathodes, which will ultimately be made into products for …
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Figure X illustrates a study done on a copper sulfide ore to evaluate the frother performance of MIBC, DF-250, and DF-1012 with constant Z-200 dosage and pH. The results are typical of many studies …
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The finely ground material is treated in two mineral floatation circuits to extract the copper, gold and silver as a copper concentrate. A portion of gold is also separately captured utilising a gravity gold circuit. The concentrate is then piped 156 kilometres south to the Kiunga port facilities located on the Fly River.
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Conventional flotation plant optimization procedures for copper and copper–gold ores have served the industry well over decades. But with the present trend in declining ore grades along with increase in metallurgical complexity, many flotation operations are experiencing significant challenges in sustaining design or operational …
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This paper discusses an integrated plant optimization tool for the flotation of complex copper and copper–gold ores in addressing the present challenges, branded …
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AERO® - Effective for a wide range of minerals such as copper, gold, and lead, AERO® promoters enhance the efficiency of flotation processes, improving throughput, grade, and recovery.
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This study presents the novel idea of a cyanide-free leaching method, i.e., glycine-ammonia leaching in the presence of permanganate, to treat a low-grade and copper-bearing gold tailing. Ammonia played a key role as a pH modifier, lixiviant and potential catalyst (as cupric ammine) in this study. Replacing ammonia with other pH …
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Flotation of Gold with Copper. The copper concentrates mentioned in the preceding paragraph that contained 21.51 percent copper and represented 86.4 percent recovery were typical of those obtained in several similar tests in which the copper rougher concentrates were cleaned once. These concentrates carried 3.29 ounces of gold per …
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The Jameson cell was successfully operated in the cleaning stage to treat the porphyry gold-copper ore in Minera Alumbrera Ltd in Argentina, resulting in gold and copper recoveries (finer than 10 µm) of about 80% and 90%, respectively (Young et al., 2006). The design has also been extensively developed since its first introduction and …
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Both quicklime and hydrated lime are widely used in the flotation and hydrometallurgical processes to aid the recovery of valuable minerals and metals including gold, silver, copper, zinc, nickel and lead-bearing ores.
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The fresh copper oxide mineral surfaces exposed during crushing and grinding have a significant effect on subsequent flotation [23], [24], [25], [26].Many dangling bonds exist on fresh mineral surfaces because of destruction of the original lattice bonds, and the copper oxide mineral surface often shows strong polarity because of the …
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The first class includes copper, lead, lead-zinc, copper-zinc, and copper-lead-zinc ores. Both gold and silver may be present, the gold values being usually associated with chalcopyrite and pyrite, and the silver with galena and tetrahedrite. Flotation follows ordinary standard methods, modified as may be necessary to bring up the …
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The basic factors, principles and variables affecting froth flotation are enumerated in condensed form below: Ore. (a) Mineralogical character. (b) Fineness of grinding. (c) Method of grinding. Agents. (a) Principal flotation agent. ("Oil") α Character. β Quantity. (b) Minor agent. α Character. β Quantity. Water. (a) Quantity with respect to …
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The role of metal-cyanide species in leaching gold from a copper concentrate. Miner. Eng., 12 (8) (1999), pp. 877-892. View PDF View article View in Scopus Google Scholar. Seke, 2005. Seke, M.D., Selective flotation of galena and sphalerite at Rosh Pinah Mine. PhD dissertation, University of Pretoria, Pretoria, 2005.
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The modeled variables are the gold, cobalt, copper and iron grades, with cobalt being of special interest as a critical material. The grades have been measured at 165 drill hole, totaling 1201 ...
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copper-gold ores (higher copper than gold values) the process route is typically flotation and smelting. In the latter case, gold credits are obtained from smelting the copper concentrates and if gold reports to the flotation tailings, they may also require cyanidation which can prove problematic with cyanide soluble copper. ...
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Froth flotation is a physicochemical process that is used to separate fine mineral particles from aqueous suspensions by selective attachment of some types of minerals to air bubbles. Froth flotation is the most important mineral processing technology for the production of valuable mineral concentrates from which metals and minerals are …
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Whichever for copper, gold or lead, the minimum flotation recoveries were obtained with the coarse size fraction (−100 + 74 μm). The maximum gold recovery of 73.88% was obtained with the size fraction of −43 + 20 μm, and the maximum copper recovery of 89.34% and the maximum entrainment lead recovery of 26.43% were …
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In order to overcome the difficulty of extracting gold from gold-bearing sulfide ore by cyanide process, flotation was adopted based on mineralogical analysis. Mineralogy shows that gold particles are of superfine structure and mainly enclosed by sulfide ores. Primary gold-bearing sulfide ore is fine-grained pyrite and arsenopyrite. The paper …
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