THE TREATMENT OF REFRACTORY COPPER-GOLD ORES …
Activox® is a hydrometallurgical process used to oxidise sulphide concentrates. The process is based on two relatively simple, established unit operations; …
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Activox® is a hydrometallurgical process used to oxidise sulphide concentrates. The process is based on two relatively simple, established unit operations; …
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Following to the inefficiency of conventional cyanidation process in processing complex gold-copper ores, the present study aims to identify processing …
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Research has been undertaken relating to the treatment of copper-gold ores, as well as to the lowering of the effects of copper-cyanide complexes. Some of the processing options include [25,26]: (1) Ore Segregation Technologies Metals 2020, 10, 897 8 of 11 Separating high-copper-containing ores selectively prior to the leaching process is an ...
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Explore the mineralogical characteristics and innovative treatment methods for refractory gold ores. Learn about physical encapsulation, chemical interference, ... followed by sulfides of copper ...
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The conventional treatment of copper–gold concentrates involves smelting, converting, and electro-refining to produce a copper-cathode product. The conventional treatment of copper–gold concentrates does elicit some compelling reasons to seek an alternative hydrometallurgical process for the recovery of concentrate values.
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The treatm ent o f refractory copper ores by the segregation process— E. T. Pinkney and N. Plint A few of these specific tests gave confirmation measured with the CO60 tracers.
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Outotec can deliver the 3 main oxidative processes for the treatment of refractory gold concentrates – BIOX, pressure oxidation, and roasting – and also supply equipment for ultra-fine grinding as a fourth, non-oxidative treatment option. ... For refractory ores, oxygen enrichment is an effective way to reduce process gas volume ...
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Rose and Newman's very comprehensive book, The Metallurgy of Gold, does not even contain the term refractory in its latest, fourth edition (1937). 1 Dorr and Bosqui's Cyanidation and Concentration of Gold and Silver (2d edition, 1950) has a brief chapter (XIII) on "Cyanicides and Refractory Ores," with only four pages devoted to ...
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Today, with a stringent economic and environmental climate prevailing in the copper business, there is increased interest in evaluating new processing alternatives for production. Hydrometallurgical pressure oxidation of copper concentrates is one of the more viable approaches, and several technological candidates have emerged. Of these, …
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The emphasis is put on the refractory oxidized ores, with a special reference to a copper deposit at Tangdan of Dongchuan mine in Yunnan province of …
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Typically, gold is encapsulated or finely disseminated in refractory gold ores and the direct cyanidation is not effective for gold extraction from these ores, even after the ore is ground to exceeding small particles (Nazari, 2017, Corrans and Angove, 1991).Especially for sulfide refractory gold ores, in order to recover gold, many …
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The nanosecond HPEMP treatment showed promising results in the treatment of gold refractory ores due to high efficiency and selectivity in the disintegration of mineral complexes. ... Flotation behaviour of gold during processing of porphyry copper-gold ores and refractory gold bearing sulfides. Minerals Engineering 10: 895–908.
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2.1 Materials and reagents. All the reagents used in the experiment, such as sulfuric acid (H 2 SO 4), nitric acid (HNO 3), copper sulfate (CuSO 4), sodium thiosulfate (Na 2 S 2 SO 3), and sodium hydroxide (NaOH), were analytically pure, and the water used in the whole experiment was deionized water with the electrical resistivity of 18.5 …
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Due to the rapid development of the world economy, the demand for copper has sharply increased.1–3 How-ever, high-quality copper resources have become …
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The recent increase in the metallurgical treatment of arsenic-containing ores (e.g. refractory gold ores and arsenical copper ores) has created a growing concern in relation to the safe disposal ...
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Since early 2001, Kalgoorlie Consolidated Gold Mines (KCGM) has successfully operated an ultra fine grinding (UFG) circuit to supplement its roaster capacity for the treatment of the refractory gold flotation concentrate. A second UFG mill was installed in 2002 taking the total UFG capacity to over 20tph while grinding to 11-12 microns and achieving over …
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The process flowsheet for enhancing the leaching rate of copper from refractory copper oxide ore using CaF 2 is shown in Fig. 1. Initially, the raw ore was crushed and ground to a particle size of − 0.074 mm, accounting for 70wt% of the total material. Subsequently, the ground ore was mixed, compacted, and sampled.
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Roasting is one of the most effective ways of rendering refractory gold ores leachable as well as being a fast pretreatment 615 616 M. G. Aylmore process compared with bio-oxidation or pressure leaching. ... Treatment of a refractory gold-copper sulfide concentrate by copper ammoniacal thiosulfate leaching influence of milling on gold ...
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The results of the analysis of the copper oxide ore chemical elements shown in Table I indicate that the main recycled component was Cu, with a content of 1.46%, and the main gangue components were SiO2, Al2O3 and MgO at 56.6%, 14.62%, and 5.53%, respectively. The results of the …
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Semantic Scholar extracted view of "Treatment of carbonaceous refractory gold ores" by P. M. Afenya. Skip to search form Skip to main ... @article{Afenya1991TreatmentOC, title={Treatment of carbonaceous refractory gold ores}, author={P. M. Afenya}, journal={Minerals Engineering}, year={1991}, volume={4}, pages={1043-1055}, …
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Currently, the natural resources of gold mine are decreased and the high-quality ores are gradually depleted, refractory gold ores consist of about one-third of the total gold production from natural ores (Konadu, 2019). Basically, refractory gold ores (gold recovery efficiency of <50% in average using direct cyanidation) are classified into ...
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In refractory gold-bearing concentrates, the gold metal is generally contaminated and encapsulated either in a sulfide matrix or in quartz, while the efficiency of the extraction of gold is low due to the structural/chemical characteristics of the concentrates itself [].Refractory concentrates, which have gold in the form of fine …
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ABSTRACT With the rising focus on the development of complex refractory ores, one of the major environmental challenges has been in the treatment and processing of arsenic-bearing minerals. An increasingly common approach is to immobilize arsenic as stable ferric arsenate phases during pressure oxidation, utilizing an existing process in …
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1. Introduction. High-grade gold ores that are highly amenable to conventional cyanide leaching have been largely depleted over time. This has a significant effect on the environmental footprint of gold production as refractory ores cannot be easily treated by simple cyanidation treatment.
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The TORCO process or Treatment of Refractory Copper Ores involved a reduction roast using salt and coal of the refractory copper silicate ore in a fluid bed roaster to reduced the copper to the ...
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Some of the innovative flotation practice.~, are discussed. 0 1997 Elsevier Science Ltd KeyworiJs Gold ores, flotation depressants, flotation collectors, mineral processing E47RODUCTION The flotation characteristics of gold or gold minerals found in porphyry copper ores and in refractory sulphide ores hai,e not been described in detail …
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The treatment of low-grade chalcopyrite ores has recently been the focus of research, with Mintek playing a prominent role. When processing chalcopyrite ... Advances in high-temperature heap leaching of refractory copper sulphide ores the allocation of irrigation liquors (either ILS or raffinate) to each heap, and the allocation of drainage ...
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The treatment of refractory copper ores by the segregation process— E. T. Pinkney and N. Plint 41 In treating calcitic and dolomitic ores, the first question is the possibility of the formation of the chlorides of calcium and magnesium. Postulating that the reaction occurs between the oxide (or cabonate) and HC1 gas, the free energies for the two
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These findings highlight that ammonia pretreatment and ammonia–cyanide leaching are promising approaches for the treatment of gold ores with high copper sulphide content. ... To improve the recovery of low-grade refractory gold ores, flotation should be followed by roasting, biological, or pressure oxidation processes so that the …
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The treatment o f refractory copper ores by the segregation process— E. T. Pinkney and N. Plint. 591. of air. The most important factor affecting the combustion process is the …
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