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Добірка наукової літератури з теми "Copper ores"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 2 березня 2023

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Статті в журналах з теми "Copper ores":

Tran, Hien Thi, and Phong Duc Pham. "Research and complete the processing technology of Son La oxide copper ores for the Tay Bac Minerals Joint Stock Company." Journal of Mining and Earth Sciences 62, no. 3b (July 20, 2021): 22–29. http://dx.doi.org/10.46326/jmes.2021.62(3b).03.

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The copper ore processing plant of the Tay Bac Minerals Joint Stock Company has been designed and operated to produce metallic copper from copper sulphide ores and copper oxide ores in Son La province. Copper sulphide ores are processed to produce copper concentrates with content of more than 20% Cu for the next processing stage, while copper oxide ores, with average content of 1÷3% Cu and after grinding, are fed directly into hydrometallurgical processes to extract copper. However, this process requires large amount of chemicals. Therefore, the economic efficiency is not high. The National Institute of Mining - Metallurgy Science and Technology has researched and proposed a reasonable technology process for Son La copper oxide ores for solving difficulties and perfecting the processing technology at the plant that improves economic efficiency and minimizes environmental pollutions. This report presents results of the experimental production research project with the code CNKK.013.19, implemented by the Institute of Materials Science and sponsored by the Ministry of Industry and Trade.

I., Blinov, and Vinogradov N. "Mineral Composition of Ores Used at Ustye-I, a Fortified Settlement of the Bronze Age (Chelyabinsk Region)." Teoriya i praktika arkheologicheskikh issledovaniy 33, no. 4 (December 2021): 166–84. http://dx.doi.org/10.14258/tpai(2021)33(4).-10.

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At the fortified settlement of the Bronze Age, Ustye-I (South Trans-Urals), metal products of copper, arsenic and tin bronzes, numerous fragments of metallurgical slags, as well as fragments of copper ores have been discovered. According to the results of early studies, pure copper predominates among metal items (53.4% of finds), but also a significant part contains an admixture of arsenic (25.4% of finds), tin (13.6% of finds) and both components simultaneously (7.6% of finds). Several alloying components of the samples are simultaneously found in slags: Pb (50% of cases), As (49% of cases), Zn (40% of cases), Bi (38% of cases), Sn (7% of cases), Ni (4% of cases), Sb (1% of cases). To identify the relationship between the incoming raw materials and the received metal, 15 ore samples were examined. The ores studied are ‘gravelly’ clasts with a size of 5 mm to several centimeters, and ‘sandy’ ores with a size of 2–3 mm. According to their mineral composition, ores are subdivided into malachite, azurite, and limonite. The main copper minerals are malachite and azurite; chrysocolla is found occasionally, chalcopyrite, cuprite are rarely found. Copper is bound to Fe- and Mn-hydroxides. We have identified copper slag fragments in ‘sandy’ ores. In all types of ores, natural alloying components are very rare and are represented by Pb and Zn. These elements can form their own minerals (mottramit, a mineral of the plumbogummite family) or act as an impurity to malachite (up to 0.62 wt% ZnO), azurite (up to 1.12 ZnO and up to 2.37 PbO), iron hydroxides (up to 2.66 ZnO and up to 2.02 PbO) or manganese hydroxides (up to 0.41 ZnO and up to 9.48 PbO). No As and Sn impurities were found. The presence of numerous fragments of brown iron ore at the settlement, the close location of copper mines indicates that the settlers were engaged in the extraction and processing of copper ore. The widespread occurrence of ores, consisting mainly of malachite and azurite, indicates that the ores were mined from the upper parts of the oxidation zone, and the metal smelted from these ores must correspond to pure copper. The distribution of Pb and Zn impurities indicates that some of the copper ores originate from the oxidation zones of pyrite ores or deposits of other formational types with a similar ore composition. The difference in the compositions of the ores found at the settlement and the compositions of slag and metal is associated with several sources of ores. The sources of copper ores could be mines located near the settlement. Arsenic-bearing ores could have come from mines in adjacent areas. Tin ores were brought in as a result of trans-regional exchange with the Central Asian region.

Fatyanov, А., and S. Scheglova. "OPTIMIZATION OF THE PROCESSING TECHNOLOGY OF COPPER ORES OF THE UDOKAN DEPOSIT." Transbaikal State University Journal 27, no. 7 (2021): 33–40. http://dx.doi.org/10.21209/2227-9245-2021-27-7-33-40.

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The composition of the mineral raw materials of the Udokan copper deposit has been studied. It is established that the copper minerals antlerite and brochantite are represented both in the form of ordinary and crystal hydrate forms, the properties of which are reflected in the flotation process. Studies were carried out on sulfide, mixed and oxidized samples of ores from the Udokan deposit. A unified flotation scheme for processing such ores with the production of sulfide and mixed copper concentrate with subsequent hydro- and pyrometallurgical methods is recommended. The objects of research are sulfide, mixed and oxidized copper ores of the Udokan deposit. The subject of the study is the technology of processing copper ores. Research objectives: – study of the mineral, material, and chemical composition of copper ores of the Udokan deposit; – study of existing technologies for processing copper ores; – conducting laboratory experiments on sulfide, mixed and oxidized ore samples of the Udokan deposit; – recommendation of a unified enrichment scheme for all types of copper ores of the Udokan deposit. Research methods. The work was carried out on the basis of studying the available sources on the occurrence, composition and structure of copper ores of the Udokan deposit, methods of their processing. In the course of laboratory studies, a flotation method of mineral enrichment was used with the use of operations to stabilize the energy state of the dispersed system (with Eh control) and subsequent electrochemical treatment of the pulp. The authors emphasize that the recommended scheme for processing copper ores from the Udokan deposit will optimize the processing technology and increase the efficiency of mining this deposit. Hydro- and pyrometallurgical methods are the most optimal for processing the obtained sulfide and mixed concentrates

Zalesov, M. V., V. A. Grigoreva, V. S. Trubilov, and A. Ya Boduen. "Designing of engineering solutions to enhance efficiency of high-copper gold-bearing ore processing." Mining Industry Journal (Gornay Promishlennost), no. 5/2021 (November 12, 2021): 51–56. http://dx.doi.org/10.30686/1609-9192-2021-5-51-56.

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The modern metals industry is characterised by a downward trend in the quality of ores involved in processing, and conventional methods of extracting useful components are inefficient for raw materials with complex composition. To maintain the growing level of metal production it is required to introduce new efficient technologies for processing of low-grade and refractory ores as well as man-made deposits. The article describes processing methods of refractory raw materials with high cyanide content using copper-gold ores as an example, where gold is the primary commodity, and copper is the accompanying useful component. The most common method of processing copper-gold ores is preconcentration followed by selective leaching of copper and gold. In some cases, technologies involving copper by-products and cyanide recovery from the cyanide leaching solutions offer equally effective options for processing of the copper-gold ores and concentrates. Copper-gold ores are processed at gold mines using the cyanide procedures, supplemented if required by gravity and flotation concentration. In all variations of the cyanide treatment, most of copper minerals actively react with cyanides of alkali metals, binding the CN– ions into the copper complex of [Cu(CN3)]2–. This reaction results in an increased solvent consumption, as well as in number of challenges related to cleaning tailings and slurries from highly toxic cyanide compounds and dissolved copper. In addition to technological complications associated with the need to meet strict requirements for the maximum permissible concentrations, copper accumulated in the cycling solutions also causes a decrease in gold extraction from the processed ores.

Chen, Bo Wei, Jian Kang Wen, and Guo Cheng Yao. "Acidophiles and its Use in Mineral Biomining with Emphasis on China." Advanced Materials Research 926-930 (May 2014): 4201–4. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.4201.

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Acidophiles have been widely used in heap and dump bioleaching of secondary copper sulfide ores and biooxidation of refractory gold ores. 22 genera of acidophiles have been found in biomining environments. This paper gives a preliminary introduction to the application of mineral biomining in China. Challenges and technical trends for heap bioleaching of primary copper sulfide ores, purification of bioleaching solution of polymetallic sulfide ores and biooxidation of carbonaceous refractory gold ores are also recommended.

Neira, Andrés, Diana Pizarro, Víctor Quezada, and Lilian Velásquez-Yévenes. "Pretreatment of Copper Sulphide Ores Prior to Heap Leaching: A Review." Metals 11, no. 7 (July 2, 2021): 1067. http://dx.doi.org/10.3390/met11071067.

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Although the main cause of hydrometallurgical plant closures is the depletion of oxidized copper minerals reserves, the lack of new hydrometallurgy projects also contributes to these closures. One solution is to be able to process copper sulphide ores hydrometallurgically. However, it is widely known that sulphide copper ores—and chalcopyrite in particular—have very slow dissolution kinetics in traditional leaching systems. An alternative to improve the extraction of copper from sulphide ores is the use of a pretreatment process. Several investigations were developed evaluating the effects of pretreatment, mainly in the extraction of copper from chalcopyrite in chloride media. This study presents a review of various pretreatment methods prior to heap leaching to aid in the dissolution of copper from sulphide ores. Different variables of pretreatment that affect the extraction of copper were identified, including the type of salts used in agglomeration, curing time, and curing temperatures. Successful cases such as the implementation of the CuproChlor® process (use of calcium chloride), and various pilot studies using sodium chloride and temperature, show that pretreatment is an alternative that aids in the dissolution of copper from sulphide ores.

Top, J. L., J. N. M. Agricola, and A. F. Fort. "Concentration of Cupriferous Micas by Hgms." Magnetic Separation News 2, no. 3 (January 1, 1988): 145–51. http://dx.doi.org/10.1155/1988/45689.

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High Gradient Magnetic Separation tests have been carried out on low grade refractory copper ores, consisting mainly of cupriferous micas. An effective concentration of copper was obtained for two types of ores. The copper grade was improved 2 and 1.5 times at a recovery of about 90%. In particular, the amount of quartz in the concentrate could be reduced. This indicates that HGMS could be a successful method for concentration of these ores.

Zvereva, N., V. Myazin, and I. Kostromina. "Technological possibility of increasing the complexity of the use of gold-bearing polymetallic ores of the Novo-Shirokinsky deposit." TRANSBAIKAL STATE UNIVERSITY JOURNAL 28, no. 6 (2022): 6–14. http://dx.doi.org/10.21209/2227-9245-2022-28-6-6-14.

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Gold-bearing polymetallic ores of the Novo-Shirokinsky deposit (further NShD) are complex, containing other valuable components besides gold and silver, which include lead, zinc, copper, iron, etc. According to the content of sulfides in the ores, they belong to the moderate sulfide type. The main feature of the material composition of ores NShD: expressed multicomponent content of valuable minerals; proximity of flotation properties of shared minerals; especially valuable mineral in ores, in addition to gold and silver, is copper, which is mainly concentrated in lead concentrate. The highest technological indicators of ore beneficiation are achieved when they are enriched according to a collective technological scheme. The technological scheme of ore beneficiation at the plant is shown in fig. 1. A lead-copper concentrate is obtained, which, as a rule, is subsequently sent for subsequent selective flotation. The factory produces two main concentrates - lead and zinc (corresponding to TU 07.29.15-002-24722376-2018, TU 1725-001-24722376-2011). This work is aimed at increasing the complexity of the use of NShD polymetallic ores in order to justify the possibility of additional production of copper concentrate at the plant. The object of the study – gold-bearing polymetallic ores of the Novo-Shirokinsky deposit. The subject of the study – flotation process of ore beneficiation as the basis for obtaining copper concentrate by constructing effective technological schemes for the polymetallic ores’ processing. The main idea of the work – sequential extraction of copper from lead concentrates using retreatments and optimal operating parameters of the flotation process

Sanwani, Edy, Riria Zendy Mirahati, and Siti Khodijah Chaerun. "Recovery of Copper from Pyritic Copper Ores Using a Biosurfactant-Producing Mixotrophic Bacterium as Bioflotation Reagent." Solid State Phenomena 262 (August 2017): 181–84. http://dx.doi.org/10.4028/www.scientific.net/ssp.262.181.

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In an attempt to investigate the use of bacteria and their metabolites as bioflotation reagents for environmentally friendly mineral processing, laboratory cell flotation tests were carried out using copper sulfide ores bearing a high content of pyrite, which were mixed with a biosurfactant-producing mixotrophic bacterium as bioflotation reagents. The interaction of bacterial cells and their metabolic products with the sulfide ores resulted in the alteration of the surface chemistry of both ores and bacterial cells as evidenced by FTIR and SEM-EDS observations as well as surface tension and contact angle measurements. The change in the surface properties of the sulfide ores in turn enabled the bacterium to function as flotation bioregeants in the flotation of copper sulfide ores as a function of bacterial cell concentration, conditioning time, flotation time and pH. Overall, the bacterium and its metabolites as bioreagents yielded flotation recoveries which might be attributed to the multi-function of the bacterium as depressant, collector and frother. Thus, the bacteria tested in this study could potentially be used as flotation bioreagents, providing an alternative to conventional flotation reagents.

Fu, Yanhua, Hongfei Xie, Yachun Mao, Tao Ren, and Dong Xiao. "Copper Content Inversion of Copper Ore Based on Reflectance Spectra and the VTELM Algorithm." Sensors 20, no. 23 (November 27, 2020): 6780. http://dx.doi.org/10.3390/s20236780.

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Copper is an important national resource, which is widely used in various sectors of the national economy. The traditional detection of copper content in copper ore has the disadvantages of being time-consuming and high cost. Due to the many drawbacks of traditional detection methods, this paper proposes a new method for detecting copper content in copper ore, that is, through the spectral information of copper ore content detection method. First of all, we use chemical methods to analyze the copper content in a batch of copper ores, and accurately obtain the copper content in those ores. Then we do spectrometric tests on this batch of copper ore, and get accurate spectral data of copper ore. Based on the data obtained, we propose a new two hidden layer extreme learning machine algorithm with variable hidden layer nodes and use the regularization standard to constrain the extreme learning machine. Finally, the prediction model of copper content in copper ore is established by using the algorithm. Experiments show that this method of detecting copper ore content using spectral information is completely feasible, and the algorithm proposed in this paper can detect the copper content in copper ores faster and more accurately.

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Дисертації з теми "Copper ores":

Seifelnassr, A. A. S. "Bacterial aided percolation leaching of copper sulphide ores." Thesis, Bucks New University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234445.

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Groenewald, Nico Albert. "Measuring the dielectric properties of crushed copper ore." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5230.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2010.
ENGLISH ABSTRACT: Previous work has shown that microwave heating of mineral ores induces micro cracks within the ore structure, which can be attributed to the difference in the adsorption of microwaves amongst the different mineral phases. This reduces the energy required during subsequent grinding and enhances the liberation of valuable minerals. In order to design microwave applicators for this purpose, knowledge of the effective dielectric properties of the crushed ore is required. Of particular interest is the effective complex permittivity of the bulk crushed ore. The measurement of the effective permittivity of a large volume of crushed ore is most readily accomplished using the waveguide measurement technique. In this method a representative sample of the material is placed in a defined and fixed volume in a standard size rectangular section metallic waveguide. The magnitude and phase angle of the transmitted and reflected low power microwaves through and from the sample are measured. The complex permittivity can be extracted from these so-called scattering, or Sij parameters. In this study the effective complex permittivities for two porphyry copper ores and a copper carbonatite ore were determined as a function of particle size distribution (-26.5+2mm) using two sizes of waveguide (WR284 and WR340). The sample holders incorporate dielectric windows for the location of the material under test. The extraction of dielectric properties from Sij parameter measurements is problematic using standard algorithms in such cases. Accordingly a new Database Extraction (DBE) Algorithm has been developed. In this method, a database of scattering parameters is established through electromagnetic modelling of the measurement system. A search algorithm is used to determine the effective complex permittivity of the modelled load whose scattering parameters provide the best fit to the experimental data. The goodness of the experimental fit of the simulated to the measured Sij parameters is determined by a root mean squared deviation minimisation metric. Results show that the method can be used successfully to determine an effective complex permittivity for a bulk volume of the crushed material. It is concluded that the dielectric property extraction over the full operational frequency interval (2.3-3 GHz) is preferred as it has a larger degree of extraction confidence and hence reliability. Results show that with increasing particle size, the experimental fit between the simulated and measured Sij parameters becomes increasingly poor, as wall effect become more prominent. The effect is most prominent for the smaller WR284 waveguide size. It is shown that for a waveguide size of similar size to the particle size, the Sij parameter fitting is poorer compared to when a larger waveguide size is used. The extracted complex permittivity reproducibility between repeated dielectric property measurements is improved for the WR340 waveguide size, as the extractions in the WR284 waveguide is dominated by the combined particle size and wall-effects of the sample holder. Ore mineralogy is identified as a key parameter that influences the dielectric properties of the crushed ore. For ores with a dominant microwave absorbent mineral phase, the dielectric constant and loss factor is found to be larger, compared with ores with a more dominant microwave transparent gangue mineral phase.
AFRIKAANSE OPSOMMING: Navorsing toon dat die verhitting van mineraal erts, met mikrogolwe, mikroskaal frakture in die mineraalstruktuur teweeg bring weens die verskil in die adsorpsie van mikrogolwe in die verskillende mineraalfases. Gevolglik verminder die energievereiste vir die vergruising van die erts en verbeter die vrystelling van waardevolle minerale wat vasgevang is in die mineraalmatriks. Vir die ontwerp van mikrogolfapplikators vir dié doel, word die effektiewe diëlektriese eienskappe van die vergruisde erts benodig. Van spesifieke belang is die effektiewe komplekse permittiwiteit van die erts. Die effektiewe permittiwiteit van `n vergruisde materiaal monster word met behulp van die golfgeleier tegniek gemeet. Vir dié tegniek word `n verteenwoordigende monster van die materiaal in `n rigiede volume in `n standaard grootte reghoekige golfgeleier geplaas. Die grootte en fasehoek komponente van die deurgelate en weerkaatste mikrogolwe deur en van die oppervlak van die materiaal word gemeet. Die komplekse permittiwiteit van die vergruisde materiaal kan geëkstrakteer word vanaf hierdie sogenaamde verspreide, of Sij parameters. In hierdie studie word die effektiewe permitiwiteit van twee porforie koper ertse en `n koper karbonatiet erts bepaal as funksie van partikel grootte (-26.5+2 mm) deur gebruik te maak van twee standaard grootte golfgeleiers. Die monster houers inkorporeer diëlektriese vensters om die vergruisde materiaal monster in posisie te hou. In so `n geval is die ekstraksie van die diëlektriese eienskappe vanuit die Sij parameter metings problematies. Gevolglik is ‘n nuwe Databasis Ekstraksie Algoritme ontwikkel wat `n databasis van verspreide parameters opstel deur die elektromagnetiese simulasie van die metingsisteem. `n Soek-algoritme word gebruik om die effektiewe komplekse permitiwiteit van die gesimuleerde monster te bepaal wat die beste ooreenstem met dié van die gemete eksperimentele Sij parameter data. Die mate van ooreenstemming tussen die parameters, word bepaal aan die hand van die minimaliserings prosedure. Resultate toon dat dié metode geskik is vir die bepaling van die effektiewe komplekse permitiwiteit van die vergruisde monster. Dit word vasgestel dat die betroubaarheid van die geëkstraeerde Sij parameters, en gevolglik die diëlektriese eienskappe van die erts, toeneem indien die algoritme oor `n groter frekwensie band uitgevoer word. Resultate toon verder dat met toenemende partikel grootte, die mate waartoe die absolute grootte en fasehoek komponente van die gesimuleerde en gemete Sij parameters ooreenstem, versleg. Dit word toegeskryf aan wand-effekte. Hierdie verskynsel is veral opmerklik vir die kleiner grootte golfgeleier. Dit word getoon dat vir metings waar die golfgeleier dieselfde orde grootte geometriese afmetings het as die vergruisde erts self, die passing tussen die gesimuleerde en gemete Sij parameters swakker is, wanneer dit vergelyk word met metings waar dit nie die geval is nie. Die reproduseerbaarheid van die geëkstraeerde diëlektriese eienskap waardes verbeter vir lesings wat uitgevoer word in `n groter grootte golfgeleier. Laasgenoemde word toegeskryf aan die meer dominante wand-effekte wat kenmerklik is vir `n kleiner golfgeleier. Erts mineralogie word geïdentifiseer as `n sleutel parameter wat die diëlektriese eienskappe van die vergruisde materiaal beïnvloed. Beide die diëlektriese konstante en verliesfaktor is groter vir ertse met `n oorheersende mikrogolf absorberende mineraalfase.

Gendall, Ian Richard. "The porphyry copper system and the precious metal-gold potential." Thesis, Rhodes University, 1994. http://hdl.handle.net/10962/d1005604.

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It has been established that porphyry copper/copper-gold deposits have formed from I Ma to 2 Ga ago. Generally, they are related to the Mesozoic-Cenozoic interval with few reported occurrences from the Palaeozoic or Precambrian. A reason cited is the erosion of these deposits which are often related to convergent plate margins and orogenic belts. Observations of the alteration and mineralisation within and around porphyry copper/copper-gold systems have been included in numerous idealised models. These alteration and mineralisation patterns are dependent on the phases of intrusion, the tectonic setting and rock type, depth of emplacement and relationship to coeval volcanics, physiochemical conditions operative within and surrounding the intrusive and many other mechanical and geochemical conditions. Island arc and cratonic arc/margin deposits are generally considered to be richer in gold than their molybdenum-rich, intra-cratonic counterparts. Metal zonation may occur around these copper/copper-gold deposits, e.g. copper in the core moving out to silver, lead, zinc and gold. This zonation is not always present and gold may occur in the core, intermediate or distal zones. Examples of gold-rich porphyry deposits from British Columbia, Chile and the SW Pacific Island regions suggest gold is closely associated with the potassic-rich zones. Generally these gold-rich zones have greater than 2% magnetite and a high oxygen fugacity is considered to be an important control for gold deposition. High Cl contents within the magma are necessary for gold mobility within the host intrusive centres. Beyond this zone HS₂ becomes an important transporting ligand. Exploration for porphyry copper-gold deposits includes an integrated geological, geophysical and geochemical approach. Petrographic work through to Landsat imagery may be used to determine the chemical conditions of the system, ore association, favourable structural zones and alteration patterns, in order to focus exploration activities.

Sainath, Narayana Rangaiah 1968. "Dynamic behavior of flow during leaching of copper ores." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/291737.

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The objective of this investigation was to experimentally determine the variation in the flow characteristics of tactite copper ores during the leaching process. The laboratory work involved estimation of porosity and permeability of cores before leaching, and after various intervals of leaching. The tests were carried out using specimens of diameter 1.5 and 4.0 inches, prepared from boulders obtained from the Cyprus Casa Grande mine. A solution containing about 25 grams of sulfuric acid per liter was used as the lixiviant. Porosity was determined using the water saturation method. The permeability was estimated using either helium or water with the specimens stressed triaxially to simulate in situ conditions. The rate of copper recovery from the specimen during the leaching process was also determined by estimating the copper content in the solution used for leaching. The results indicate that the permeability and porosity of the specimens increased with leaching, but both tend to remain constant after most of the soluble material in the core was dissolved. The rate of copper recovery was high initially but dropped as leaching progressed and the copper in the specimen was depleted.

Crane, Martin John, University of Western Sydney, of Science Technology and Environment College, and of Science Food and Horticulture School. "Geochemical studies of selected base metal minerals from the supergene zone." THESIS_CSTE_SFH_Crane_M.xml, 2001. http://handle.uws.edu.au:8081/1959.7/232.

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Acid leaching of different natural chrysocolla samples under ambient conditions demonstrated that the chemical and chrystallographic inhomogenity significantly affects the rate and that it is virtually impossible to use the mineral as a model for the kinetics of hydrometallurgical processing of copper ores.Dissolution experiments, stability diagrams,and X-ray powder diffraction studies are undertaken and studied in this research and results are given.It is found that a complete solid solution series exists in Nature with most tungstenian wulfenites and molybdenum stolzites containing a range of compositions. The first occurrence of a molybdenum stolzite from Broken Hill, Australia, which also contains small amounts of chromium is noted.Raman microprobe spectroscopy has proven to be a very quick and effective non-destructive method for semi-quantitative analysis of the wulfenite-stolzite and powellite-scheelite solid-solution series and in detecting very small amounts of substituted chromate in wulfenite, stolzite and anglesite
Doctor of Philosophy (PhD)

Kamali, Mahtab. "Recovery of copper from low-grade ores by Aspergillus niger." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ64055.pdf.

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Jiang, Mofen. "The Chemical and kinetic mechanism for leaching of chrysocolla by sulfuric acid." Thesis, The University of Arizona, 1992. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1992_610_sip1_w.pdf&type=application/pdf.

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Latorre, J. J. "Exploration for stratabound copper, lead and zinc deposits in the Damara-Katanga orogen, central-southern Africa." Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1005558.

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The Damara-Katanga orogen in central-southern Africa represents an area of 1.73xl0⁶ sq. km. The region is considered one of the wealthiest metallogenic provinces in the world. Successful exploration for stratabound base-metal deposits has taken place at this particular area since the introduction of more organised methodology in the early 1920s. The genesis, location and distribution of the ore deposits are related to their tectonic settings. Geodynamic evolution of the orogen, which initially formed part of a complex Pan-African rift system, comprises the following stages rifting; downwarping, including spreading on the western portion; syn-orogeny and late-orogeny. Two major tectonic events in the history of the region have been identified: the Katangan (900-750 Ma) and the Damaran episodes (750-500 Ma). Timing of mineralisation of ore deposits has been related to the evolutionary stages of the orogen. Genetic models of the most productive deposits are briefly discussed in this dissertation. The sedimentological, geochemical, paleogeographic and structural features can be employed as geological guidelines for integrated exploration programmes. Discoveries of major deposits and prospects in the orogen are also summarised, focussing on the exploration methods employed. The cost-effective use of the exploration techniques includes the classical copper-lead-zinc soil sampling for residual soils such as those in the Copperbelt area. Airborne magnetics and electromagnetics and follow-up ground geophysics have proved successful in areas where the cover is transported in the search for shallow ore deposits such as the Matchless massive sulphides. Remote sensing, geochemical and geophysical techniques have been tried in covered areas of western Botswana. The lack of geological control makes this interpretation difficult. A detailed geological mapping and the use of geochemical and geophysical techniques has been used to delineate carbonate-hosted base-metal deposits at the Otavi Land. The more expensive traditional methods necessary for the delineation of orebodies, such as pitting, trenching and drilling, are also discussed. Using a sequential approach, a possible exploration strategy is suggested, outlining the cost-effective use of remote sensing, geochemical and geophysical techniques. Standardisation in basic geological information is required for future successful explorations in the Damara-Katanga orogen, as well as attractive mining policies. In the event of their implementation, exploration perspectives are promising, specifically in terms of ore potential.

Légaré, Nathalie. "Les minéralisations de zinc-cuivre du secteur Frotet-Troilus, Chibougamau, Québec /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2002. http://theses.uqac.ca.

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Barriga, Vilca Abrahan. "Studies on the curing and leaching kinetics of mixed copper ores." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44500.

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Heap leaching is a metal extraction process from low grade ores where crushed ore is stacked on an impermeable pad and irrigated from the top with a solution of chemical reagents. An enriched solution containing the targeted metal is collected at the bottom. This technique involves complex chemical/electrochemical reactions and transport processes. Among the main features of this method of extraction include low capital and operative cost, modularity, and relatively high inventory of solutions. The need to optimize a heap operation has led to research studies in order to understand and interpret the chemistry and transport involved in a heap leach. These scientific investigations are focused on mathematical expressions of the reactions and transport phenomena of the minerals and reagents from the particle scale to the bulk scale. However, it was envisaged that pretreatment of these minerals are not accounted for in existing mathematical models of heap leaching. Sulfuric acid curing is a pretreatment to accelerate the extraction kinetics of copper ores and is widely used in copper operations. The curing process involves the addition of a highly concentrated sulfuric acid to the copper ore during agglomeration. Then, chemical reactions already begin prior to irrigation of the heap, transforming the initial copper species into new copper species which are easier to solubilize once the leach solution is provided to top of the heap. The present study aims to provide a means for the systematic integration of the curing pretreatment and the subsequent leaching process. The numerical implementation of the model is done using the Matlab programming language. The focus of this curing and leaching model is to represent the leaching kinetics of each mineral species, which involves solution of a system of ordinary differential equations. The numerical parameters of the proposed curing and leaching kinetic model were found from a set of laboratory experiments. Additionally, novel methods for determining the optimum agglomeration moisture, the optimum sulfuric acid dose for acid curing, and the relevant solute transport parameters were employed. The resulting model can be applied for design, scale-up, and optimization of a new or existing commercial heap leach operation.

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Книги з теми "Copper ores":

1923-, Tooker Edwin Wilson, ed. Gold in porphyry copper systems. [Washington D.C.]: U.S. G.P.O., 1990.

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Blatov, I. A. Obogashchenie medno-nikelevykh rud. Moskva: Ruda i metally, 1998.

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C, Sweet Palmer, ed. Copper, lead, and zinc resources in Virginia. Charlottesville, Va: Commonwealth of Virginia, Dept. of Mines, Minerals, and Energy, Division of Mineral Resources, 1989.

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Lee, Andrew Walther. Evolution of the Rosario copper-molybdenum porphyry deposit and associated copper-silver vein system, Collahuasi District. Ann Arbor, MI: [UMI Dissertation Services, 1993.

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Dongchuan Shi (China). Kuang wu ju. and Xi nan ye jin di zhi kan tan gong si., eds. Dongchuan tong kuang kuang shi di gou zao he jie gou. 8th ed. Kunming: Yunnan ren min chu ban she, 1985.

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Naboĭchenko, S. S. Avtoklavnai͡a︡ pererabotka medno-t͡s︡inkovykh i t͡s︡inkovykh kont͡s︡entratov. Moskva: "Metallurgii͡a︡", 1989.

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India, Geological Survey of, ed. General information on copper-lead-zinc ores in India. [Calcutta]: Geological Survey of India, 1994.

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Litoshko, D. N. Topomineralogii͡a︡ medno-molibdenovoĭ rudnoĭ format͡s︡ii Poli͡a︡rnogo Urala. Leningrad: "Nauka," Leningradskoe otd-nie, 1988.

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Ortega, Rustin Cabrera. Geología y regularidades de la distribución de los yacimientos de cobre y oro de la región mineral de Las Villas. La Habana: Instituto de Geología y Paleontología, Academia de Ciencias de Cuba, 1986.

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Ivanovich, Gorbunov Grigoriĭ, ed. Geologii͡a︡ medno-nikelevykh mestorozhdeniĭ SSSR: Sbornik nauchnykh trudov. Leningrad: "Nauka," Leningradskoe otd-nie, 1990.

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Частини книг з теми "Copper ores":

Szymanowski, Jan. "Processing of Copper Ores." In Hydroxyoximes and Copper Hydrometallurgy, 367–411. Boca Raton: Routledge, 2022. http://dx.doi.org/10.1201/9780203751336-21.

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Toro, L., C. Abbruzzese, F. Vegliò, and B. Paponetti. "Biometallurgy for Manganese and Copper Ores." In Advances in Fine Particles Processing, 441–51. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4684-7959-1_37.

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Avila-Salinas, W. "Origin of the Copper Ores at Corocoro, Bolivia." In Stratabound Ore Deposits in the Andes, 659–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-88282-1_52.

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Norgate, Terry, Sharif Jahanshahi, and Nawshad Haque. "Rock Smelting of Copper Ores with Waste Heat Recovery." In REWAS 2013, 217–30. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-48763-2_23.

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Norgate, Terry, Sharif Jahanshahi, and Nawshad Haque. "Rock Smelting of Copper Ores with Waste Heat Recovery." In REWAS 2013, 217–30. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118679401.ch23.

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Bocharov, V., V. Ignatkina, A. Kayumov, M. Viduetsky, and V. Maltsev. "Complex Processing of Refractory Pyrite Copper, Copper-Zinc and Polymetallic Ores on the Basis of Flotation and Combined Technologies." In Progress in Materials Science and Engineering, 89–96. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75340-9_12.

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Hagni, Richard D. "Ore Microscopic Study of Copper Losses from Mining of Bornite Ores in the Sweetwater Mine, Viburnum Trend, Southeast Missouri." In Proceedings of the 10th International Congress for Applied Mineralogy (ICAM), 307–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27682-8_37.

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Golovanov, I. M., E. I. Nikolayeva, and M. A. Khazikhin. "Geological and Structural Conditions of Localization of the High-Grade Ores of Porphyry Copper Deposits." In Special Publication No. 4 of the Society for Geology Applied to Mineral Deposits, 261–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-70902-9_18.

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Meng, Yinsheng, Ruizhong Zhang, Ruide Liu, Tianliang Lin, and Wenguo Wang. "Application of Multiple Geophysical Methods to Prospect Concealed Ores Beneath Quaternary Cover: A Case Study from a Copper-Polymetallic Deposit." In Technology and Application of Environmental and Engineering Geophysics, 243–49. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3244-8_28.

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Ehrlich, Henry L. "Technical Potential for Bioleaching and Biobeneficiation of Ores to Recover Base Metals (Other than Iron or Copper), Platinum-Group Metals and Silver." In Biomining, 129–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-06111-4_7.

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Тези доповідей конференцій з теми "Copper ores":

"Bioleaching of sulfide copper-nickel ores." In Bioinformatics of Genome Regulation and Structure/Systems Biology (BGRS/SB-2022) :. Institute of Cytology and Genetics, the Siberian Branch of the Russian Academy of Sciences, 2022. http://dx.doi.org/10.18699/sbb-2022-294.

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Шмакова, Александра. "Сharacterization of copper-nickel mineralization of metagabbroids (North Timan)". У Mineralogical and technological appraisal of new types of mineral products. Petrozavodsk: Karelian Research Center of RAS, 2019. http://dx.doi.org/10.17076/tm13_10.

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The article discusses the comparison of the mineralogical and technological properties of minerals and the whole copper-nickel ore manifestations of the "Blizhneye" and "Dal'neye" Bugrovskaya area. According to the results of the study, rock-forming and secondary minerals of ore-bearing rocks were established. Characterized sulfide minerals and their associations. In general, the complexity of ores, including precious metal mineralization, was noted. According to the obtained mineralogical data, possible methods of ore enrichment are predicted.

Nakajima, Yasuharu, Joji Yamamoto, Shigeo Kanada, Sotaro Masanobu, Ichihiko Takahashi, Jun Sadaki, Ryosuke Abe, Katsunori Okaya, Seiji Matsuo, and Toyohisa Fujita. "Study on Seafloor Mineral Processing for Mining of Seafloor Massive Sulfides." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83354.

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Seafloor Massive Sulfides (SMSs), which were formed by deposition of precipitates from hydrothermal fluids vented from seafloor, has been expected as one of unconventional mineral resources on deep seafloors in the oceans. The authors have proposed the concept of seafloor mineral processing for SMS mining, where valuable minerals contained in SMS ores are separated on seafloor while gangue minerals are disposed on seafloor in appropriate ways. To confirm the applicability of column flotation, which is one of conventional mineral processing methods, to seafloor mineral processing, the authors carried out experiments simulating column flotation under the pressure conditions corresponding to the water depths down to 1000m in maximum using ore samples containing copper, iron, zinc and lead. In the experiments, formation of fine bubbles suitable to flotation and overflow of froth layer were observed at high pressures. The contents of copper and zinc in the concentrates recovered in the experiments at 1MPa were higher than those in the feed ores while the contents of silicon and calcium in the concentrates were lower than those in the feed ores. These results suggest that column flotation would be applicable to seafloor mineral processing.

Nakajima, Yasuharu, Shotaro Uto, Shigeo Kanada, Joji Yamamoto, Ichihiko Takahashi, Sho Otabe, Jun Sadaki, Katsunori Okaya, Seiji Matsuo, and Toyohisa Fujita. "Concept of Seafloor Mineral Processing for Development of Seafloor Massive Sulfides." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49981.

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Seafloor Massive Sulfides (SMS), which were formed by deposition of precipitates from hydrothermal fluids vented from seafloor, is one of unconventional mineral resources beneath deep seafloors in the world. The authors have proposed the concept of seafloor mineral processing for development of SMS, where useful minerals included in SMS ores are separated on seafloor to be lifted while the remaining gangue is disposed on seafloor in appropriate ways. To apply column flotation, one of conventional methods in mineral processing, to seafloor mineral processing, the authors carried out simulating experiments of column flotation on deep seafloor using ores including copper, iron, lead and zinc as metallic elements. Prior to the experiments at high pressures, preparatory experiments at the atmospheric pressure were carried out to find out the optimum condition of the properties of pulp, a mixture of feed ore, water and chemical reagents. In flotation experiments at high pressures, formation and overflow of froth layer by bubbling were observed at 1MPa in both of pulps with pure water and artificial seawater. The analytical data showed that the concentration of metallic elements such as copper and zinc in the concentrates recovered from the experiments was higher than that in the feed ores while the concentration of silicon and calcium, which are assigned to gangue, in the concentrates was lower than that in the feed ores. These results suggest that column flotation can be applied to operation on seafloor.

Nakajima, Yasuharu, Joji Yamamoto, Tomoko Takahashi, Blair Thornton, Yuta Yamabe, Gjergj Dodbiba, and Toyohisa Fujita. "Development of Elemental Technologies for Seafloor Mineral Processing of Seafloor Massive Sulfides." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-96040.

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Abstract Seafloor Massive Sulfides have been expected to be future mineral resources. The grade of valuable metallic elements in ores of Seafloor Massive Sulfides is usually small percentage. If valuable minerals can be extracted from the ores on deep seafloor, the total mining cost can be reduced significantly. The authors proposed Seafloor Mineral Processing, where ores are to be ground into fine particles and separated into concentrates and tailings on seafloor. The Seafloor Mineral Processing system consists of processing units for unit operations such as grinding and separation. To investigate the applicability of flotation, which is a method to separate ore particles by using the difference in wettability of minerals, to the separation unit, measurements of contact angles of sulfide minerals at high pressures were carried out. The results suggested that the contact angles of the minerals would have relationships with pressure in depending on the kind of minerals and solutions. In addition, applying Laser-Induced breakdown Spectroscopy (LIBS), an optical method for elemental analysis, to measurement of metal grade of ore particles handled as slurry in the processing units was also investigated. Signals assigned to copper, zinc, and lead were successfully detected in the spectra obtained from ore particles in slurry flow.

Kostryukova, Anastasiya. "INFLUENCE OF COPPER-SULPHIDE ORES MINING AND PROCESSING ON ENVIRONMENT." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/52/s20.069.

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Baibatsha, Adilkhan. "MINERALOGY OF COPPER-NIKEL ORES IN ULYTAU ZONE (CENTRAL KAZAKHSTAN)." In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b11/s1.039.

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Yefimenko, S. A. "Monitoring of the Extraction of Copper Ores in Kazakhmys LLC." In 1st EAGE International Geosciences Conference on Kazakhstan. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609.20145718.

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Kharitonov, Timyr. "Plants of the Urals of the 18th-19th centuries, working on cuprous sandstone ores, and dumps of their mines." In Проблемы минералогии, петрографии и металлогении. Научные чтения памяти П. Н. Чирвинского. ПЕРМСКИЙ ГОСУДАРСТВЕННЫЙ НАЦИОНАЛЬНЫЙ ИССЛЕДОВАТЕЛЬСКИЙ УНИВЕРСИТЕТ, 2022. http://dx.doi.org/10.17072/chirvinsky.2022.278.

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For the first time, information has been brought together about old copper smelters in the Western Urals and the Volga region, which worked on cuprous sandstones, their production and the volume of mine dumps that provided the factories with copper ores. The resources and the cost of copper in the dumps have been calculated.

Brodbeck, Maurice, Sean Harrison McClenaghan, Balz Samuel Kamber, and Patrick Redmond. "Redistribution of Rare Metal(loids) during Digenite Exsolution in Porphyry Copper Ores." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.264.

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Звіти організацій з теми "Copper ores":

Jonasson, I. R., O. R. Eckstrand, and D. H. Watkinson. Preliminary Investigations of the Abundance of Platinum, Palladium and Gold in Some Samples of Canadian Copper - Nickel Ores. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/122476.

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Williams-Jones, A. E., I. M. Samson, and R. L. Linnen. Preliminary Results of a Study of the Ores, Wall-Rock Alteration, and Fluid Inclusions At the Madeleine Copper Mine, Gaspe, Quebec. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/120385.

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Byers, C. H., J. M. Begovich, and J. M. Holmes. An economic and energy evaluation of the replacement of conventional technology with continuous chromatography in the dump leaching of copper ores. Office of Scientific and Technical Information (OSTI), February 1989. http://dx.doi.org/10.2172/6111296.

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Travis, B. A Simulator for Copper Ore Leaching. Office of Scientific and Technical Information (OSTI), May 1999. http://dx.doi.org/10.2172/763213.

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McMillan, W. J. Chapter 7a: Geology and Ore Deposits of the Highland Valley Copper Mine. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/132372.

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Spano, Christian, Paolo Natali, Charles Cannon, Suzanne Greene, Osvaldo Urzúa, Carlos Sucre, and Adriana Unzueta. Latin America and the Caribbean 2050: Becoming a Global Low-Carbon Metals and Solutions Hub. Inter-American Development Bank, July 2021. http://dx.doi.org/10.18235/0003412.

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This report evaluates scope 3 emissions along the copper and iron ore value chains and the opportunities that Latin America and the Caribbean (LAC) has to become a low carbon metals and solutions hub. The report presents four carbon emission scenarios that represent different sets of decisions for policy-makers and investors. Two scenarios fall short of aligning with Paris targets: (1) the business as usual (BaU) scenario with no further abatement action; and (2) a BaU scenario with the current level of emission reduction potential from players in the value chain (BaU Possible). The other two scenarios deliver the required carbon reductions to be compliant with the Paris Agreement by 2060, but through different strategies: (3) the BaU Paris scenario. where alignment with Paris targets is achieved by keeping BaU volumes and reducing carbon intensity per tonne of metal; and (4) the Decoupled scenario, where carbon intensity reductions are relaxed and compensated by a reduction in primary supply to align the value chain emissions to a Paris trajectory. All scenarios require LACs leaders to consider investments in low-carbon technology in different degrees. The report argues that, given its competitive position in the cost curve for copper and iron ore and an abundance of enabling factors for low carbon strategies, the region could become a key source of low carbon metals and solutions as long as it is proactive in adopting all the necessary measures from public sector and industry perspectives. Finally, the report concludes that myriad opportunities exist for LAC, including new business models, technologies and products, and that these could yield a greater economic and social contribution to the region than the BaU trajectories.

Ames, D. E., and M. G. Houlé. Targeted Geoscience Initiative 4: Canadian nickel-copper-platinum group elements-chromium ore systems -- fertility, pathfinders, new and revised models. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2015. http://dx.doi.org/10.4095/296674.

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Mowatt, J. C., and T. C. Mowatt. Skarns and ore deposits of the Whitehorse Copper Belt, Yukon Territory, Canada: Some aspects of petrogenesis and mineralization at the Arctic Chief, Little Chief, and Black Cub South localities. Alaska Division of Geological & Geophysical Surveys, December 2007. http://dx.doi.org/10.14509/19557.

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Ames, D. E., and M. G. Houlé. A synthesis of the TGI-4 Canadian nickel-copper-platinum group elements-chromium ore systems project -- revised and new genetic models and exploration tools for Ni-Cu-PGE, Cr-(PGE), Fe-Ti-V-(P), and PGE-Cu deposits. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2015. http://dx.doi.org/10.4095/296675.

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Corriveau, L., J. F. Montreuil, O. Blein, E. Potter, M. Ansari, J. Craven, R. Enkin, et al. Metasomatic iron and alkali calcic (MIAC) system frameworks: a TGI-6 task force to help de-risk exploration for IOCG, IOA and affiliated primary critical metal deposits. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/329093.

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Australia's and China's resources (e.g. Olympic Dam Cu-U-Au-Ag and Bayan Obo REE deposits) highlight how discovery and mining of iron oxide copper-gold (IOCG), iron oxide±apatite (IOA) and affiliated primary critical metal deposits in metasomatic iron and alkali-calcic (MIAC) mineral systems can secure a long-term supply of critical metals for Canada and its partners. In Canada, MIAC systems comprise a wide range of undeveloped primary critical metal deposits (e.g. NWT NICO Au-Co-Bi-Cu and Québec HREE-rich Josette deposits). Underexplored settings are parts of metallogenic belts that extend into Australia and the USA. Some settings, such as the Camsell River district explored by the Dene First Nations in the NWT, have infrastructures and 100s of km of historic drill cores. Yet vocabularies for mapping MIAC systems are scanty. Ability to identify metasomatic vectors to ore is fledging. Deposit models based on host rock types, structural controls or metal associations underpin the identification of MIAC-affinities, assessment of systems' full mineral potential and development of robust mineral exploration strategies. This workshop presentation reviews public geoscience research and tools developed by the Targeted Geoscience Initiative to establish the MIAC frameworks of prospective Canadian settings and global mining districts and help de-risk exploration for IOCG, IOA and affiliated primary critical metal deposits. The knowledge also supports fundamental research, environmental baseline assessment and societal decisions. It fulfills objectives of the Canadian Mineral and Metal Plan and the Critical Mineral Mapping Initiative among others. The GSC-led MIAC research team comprises members of the academic, private and public sectors from Canada, Australia, Europe, USA, China and Dene First Nations. The team's novel alteration mapping protocols, geological, mineralogical, geochemical and geophysical framework tools, and holistic mineral systems and petrophysics models mitigate and solve some of the exploration and geosciences challenges posed by the intricacies of MIAC systems. The group pioneers the use of discriminant alteration diagrams and barcodes, the assembly of a vocab for mapping and core logging, and the provision of field short courses, atlas, photo collections and system-scale field, geochemical, rock physical properties and geophysical datasets are in progress to synthesize shared signatures of Canadian settings and global MIAC mining districts. Research on a metamorphosed MIAC system and metamorphic phase equilibria modelling of alteration facies will provide a foundation for framework mapping and exploration of high-grade metamorphic terranes where surface and near surface resources are still to be discovered and mined as are those of non-metamorphosed MIAC systems.