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Journal articles on the topic 'Copper ores – Zambia – Analysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Liang, Yi Li, Hua Qun Yin, Yun Hua Xiao, et al. "Microbial Leaching of Copper from Tailings of Low Grade Sulphide Ores in Zambia." Advanced Materials Research 1130 (November 2015): 473–76. http://dx.doi.org/10.4028/www.scientific.net/amr.1130.473.

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Demand for copper is growing in the world,which makes it increasingly necessary to process low-grade ores and tailings that used to be considered as wastes. The development and application of bioleaching by acidophilic chemolithotrophic microorganisms, which obtain energy from the oxidation of sulfide minerals and use carbon dioxide for constructive metabolism, has been a major approach for processing the low-grade copper ores. In this study, mixed culture consisted of six iron and sulfur oxidizing microorganisms were used in leaching of flotation and acid-leaching tailings obtained from Zambi

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2

Ngom, Baba, Yili Liang, and Xueduan Liu. "Cross-Comparison of Leaching Strains Isolated from Two Different Regions: Chambishi and Dexing Copper Mines." BioMed Research International 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/787034.

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A cross-comparison of six strains isolated from two different regions, Chambishi copper mine (Zambia, Africa) and Dexing copper mine (China, Asia), was conducted to study the leaching efficiency of low grade copper ores. The strains belong to the three major species often encountered in bioleaching of copper sulfide ores under mesophilic conditions:Acidithiobacillus ferrooxidans,Acidithiobacillus thiooxidans, andLeptospirillum ferriphilum. Prior to their study in bioleaching, the different strains were characterized and compared at physiological level. The results revealed that, except for cop

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3

Sun, Jia Lin, Ba Ba Ngom, Yi Liu, et al. "Comparison of Indigenous and Exogenous Mesophilic Bacteria for the Bioleaching of Low Grade Copper Ores." Advanced Materials Research 825 (October 2013): 58–61. http://dx.doi.org/10.4028/www.scientific.net/amr.825.58.

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Using indigenous microorganisms in biomining processes assures few ecological distortions and less time consumption for adaptation. However, there is a debate as to whether an indigenous microbial community is more efficient than one composed of microbial strains selected for specific physiological traits. In order to provide thoughtful opinions in such a debate, a cross-comparison of six strains isolated from two different regions: Chambishi Copper Mine (Zambia) and Dexing Copper Mine (China), was conducted. Physiological properties and leaching performancesof Acidithiobacillus ferrooxidans,

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4

HAJHUSSEIN, A. "Ultraviolet spectrophotometric determination of copper in copper ores by flow-injection analysis." Talanta 43, no. 11 (1996): 1909–14. http://dx.doi.org/10.1016/0039-9140(96)01968-6.

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5

Wu, Ai Xiang, Bao Hua Yang, Jin Zhi Liu, and Xiu Xiu Miao. "Effect of Bio-Leaching Process on the Pore Structure of Packed Particle Bed via 3D Imaging and Analysis." Advanced Materials Research 825 (October 2013): 344–47. http://dx.doi.org/10.4028/www.scientific.net/amr.825.344.

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Heap bio-leaching technology is extensively applied to recover metals from low-grade complex ores in the mining industry, particularly the copper sulfide ores. Understanding the effect of bio-leaching process on the pore structure of packed particle beds is important to enhance the percolation and leaching performances with respect to design and operation of heap leaching system. The porosity, pore size distribution and degree of pore connectivity are the three most important features correlated with fluid flow in heap leaching operation. In this study, a spiral X-ray CT scanner, combined with

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6

Tanaka, Yoshiyuki, Hajime Miki, Gde Suyantara, Yuji Aoki, and Tsuyoshi Hirajima. "Mineralogical Prediction on the Flotation Behavior of Copper and Molybdenum Minerals from Blended Cu–Mo Ores in Seawater." Minerals 11, no. 8 (2021): 869. http://dx.doi.org/10.3390/min11080869.

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The copper ore in Chilean copper porphyry deposits is often associated with molybdenum minerals. This copper–molybdenum (Cu–Mo) sulfide ore is generally mined from various locations in the mining site; thus, the mineral composition, oxidation degree, mineral particle size, and grade vary. Therefore, in the mining operation, it is common to blend the ores mined from various spots and then process them using flotation. In this study, the floatability of five types of Cu–Mo ores and the blending of these ores in seawater was investigated. The oxidation degree of these Cu–Mo ores was evaluated, an

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7

Shang, He, Biao Wu, Jian Kang Wen, and Xing Lan Cui. "Analysis of Microbial Community in Heap Bioleaching of Low-Grade Copper Sulfide Ores." Key Engineering Materials 777 (August 2018): 277–81. http://dx.doi.org/10.4028/www.scientific.net/kem.777.277.

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High-throughput sequencing technology also known as "next generation" sequencing technology, compared with the traditional sequencing method has the characteristics of fast speed, high flux, low cost. In recent years the technology in the detection of microbial diversity has been fully applied. In this study, the microbial community of ore heap in different area and different depth was studied by using this method. The results showed the bio - heap leaching of low - grade secondary copper sulfide ore in Zijinshan from China could effectively recover the copper in the ore. The number of microor

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Wang, jianguo, wen Zhang, Yifan Zhang, Faming Tian, Yunying Duan, and Wenyu Sun. "Analysis on the geochemical characteristics of Chachalongwa copper, lead and zinc polymetallic ores." IOP Conference Series: Earth and Environmental Science 199 (December 19, 2018): 042043. http://dx.doi.org/10.1088/1755-1315/199/4/042043.

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9

HUELGA-SUAREZ, G., M. MOLDOVAN, M. SUÁREZ FERNÁNDEZ, M. ÁNGEL DE BLAS CORTINA, F. VANHAECKE, and J. I. GARCÍA ALONSO. "LEAD ISOTOPIC ANALYSIS OF COPPER ORES FROM THE SIERRA EL ARAMO (ASTURIAS, SPAIN)*." Archaeometry 54, no. 4 (2011): 685–97. http://dx.doi.org/10.1111/j.1475-4754.2011.00635.x.

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10

Kamradt, Andreas, Juliane Schaefer, Axel Schippers, and Sabrina Hedrich. "Comparative Bioleaching and Mineralogical Characterization of Black Shale-Hosted Ores and Corresponding Flotation Concentrates." Solid State Phenomena 262 (August 2017): 139–42. http://dx.doi.org/10.4028/www.scientific.net/ssp.262.139.

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In this study, two black shale copper ores from different Mid-European Kupferschiefer-type deposits and their flotation concentrates were used for bioleaching tests. All samples were subjected to stirred tank bioleaching using an acidophilic, moderately thermophilic microbial consortium. The distribution of sulfides and gangue minerals in the ores, copper concentrates and residues of both, bioleaching and sterile chemical control tests were investigated using EDX-based particle analysis. The black shale ores and the extracted copper concentrates varied in their mineralogical composition with r

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11

Nogaeva, Kulzhamal, Yessil Alpiyev, Almaz Kozhonov, Valerii Korniyenko, and Yevhenii Malanchuk. "Technological basis of processing of serpentinite copper-gold ores in the Kyrgyz Republic." E3S Web of Conferences 280 (2021): 08005. http://dx.doi.org/10.1051/e3sconf/202128008005.

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Annotation. The article is devoted to the development of an effective technology for processing serpentinite ores from the Bozymchak deposit in the Kyrgyz Republic. Based upon the analysis of mineralogical, physical and chemical parameters of the ore, the authors set reasons for the decrease in technological indicators of the existing concentrator and determine concentrating properties of the reviewed serpentinite resistant material by applying methods of intensifying the flotation process by using additional flotation collectors/depressors and introducing the process of mechanochemical activa

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12

Yanishevskya, Elena, Nadezhda Fokina, Ekaterina Selivanova, Alena Kompanchenko, Dmitriy Makarov, and Andrey Goryachev. "Processing of Sulfide Copper-Nickel Ores from the Deposits in Murmansk Region by Heap Leaching." Minerals 11, no. 8 (2021): 820. http://dx.doi.org/10.3390/min11080820.

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The feasibility of processing low-grade copper-nickel ores by heap bioleaching was investigated. It was found that an iron-oxidizing strain of acidophilic microorganisms, Acidithiobacillus ferrivorans, is effective in the leaching of sulfide ores from the deposits in Russia’s Murmansk region. Sulfide mineralization of the studied mineral feeds was described using the methods of X-ray phase analysis and optical microscopy. In the process of leaching, the pH and Eh values and the concentrations of ferric and ferrous iron, nickel, and copper ions were monitored. By the end of the experiment, 16.5

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13

Klochko, Viktor I., Vjacheslav I. Manichev, Galina S. Kompanec, and Miron S. Kovalchuk. "Wychodnie rud miedzi na terenie ukrainy zachodniej jako baza surowcowa metalurgii kolorowej w okresie funkcjonowania kultury trypolskiej." Folia Praehistorica Posnaniensia 10 (November 1, 2018): 47–77. http://dx.doi.org/10.14746/fpp.2003.10.03.

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The article presents a study of copper ore from western Ukraine aimed at explanation of possibilities of their exploitation for the color metallurgy development during the period of Tripolye culture. It gives a short characteristics of lithological, mineralogical, and geochemical composition of copper ores from the Dneper area, Volhynia, and the Carpathians plateau. It further presents results of chemical and spectral analysis of ore-bearing rocks, evaluation of its current state and potential possibilities of their use in the past. Based upon a statement that metal objects produced during the

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14

Chambers, B., C. A. Pickles, and J. G. Peacey. "Thermodynamic Analysis of the Sulphation Roasting of Enargite Concentrates." High Temperature Materials and Processes 31, no. 4-5 (2012): 613–25. http://dx.doi.org/10.1515/htmp-2012-0099.

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AbstractThe mining industry is under increasing pressure to assess the extraction of value from complex copper ores, such as those containing enargite (Cu3AsS4), due to the rising demand for copper and gold. A sulphation roast, weak acid leach, and electrowinning process flowsheet has been studied to address the treatment of copper concentrates containing significant amounts of enargite. Copper is recovered from the calcine by acid leaching, with most of the arsenic being fixed in the leach residue after gold extraction by cyanidation. The relative simplicity of roasting combined with proven h

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15

Benavente, Oscar, Ma Cecilia Hernández, Evelyn Melo, Luis Ardiles, Víctor Quezada, and Yuri Zepeda. "Copper Extraction from Black Copper Ores through Modification of the Solution Potential in the Irrigation Solution." Metals 9, no. 12 (2019): 1339. http://dx.doi.org/10.3390/met9121339.

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This article presented the behavior of ores containing black copper under acid leaching. The solution potential was modified by adding agents, and five leaching conditions were evaluated, one as a control based on sulfuric acid leaching (conventional), and the others by changing the solution potential with: ferrous sulfate (FeSO4), white metal (Cu2S), sulfur dioxide (SO2), and ozone (O3). Leaching behavior was evaluated with laboratory bottle (ISO-pH) and column leaching tests. Two ores samples from the Lomas Bayas mine were used. The samples, identified as low (LG) and high grade (HG), were c

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16

Kodali, Phanindra, Nikhil Dhawan, Tolga Depci, C. L. Lin, and Jan D. Miller. "Particle damage and exposure analysis in HPGR crushing of selected copper ores for column leaching." Minerals Engineering 24, no. 13 (2011): 1478–87. http://dx.doi.org/10.1016/j.mineng.2011.07.010.

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17

Alov, Nikolai, and Pavel Sharanov. "Elemental Analysis of Copper-Zinc Ores by Total Reflection X-Ray Fluorescence using Nonaqueous Suspensions." Analytical Letters 51, no. 11 (2018): 1789–95. http://dx.doi.org/10.1080/00032719.2017.1390758.

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18

M., Ankushev, Zaykov V., Molchanov I., Koryakova L., Panteleyeva S., and Yuminov A. "Metallurgical Slags and Ore Fragments from the Kamenny Ambar Bronze Age Settlement (Southern Urals): a Key to Knowledge of Copper Sources." Teoriya i praktika arkheologicheskikh issledovaniy 33, no. 1 (2021): 34–57. http://dx.doi.org/10.14258/tpai(2021)33(1).-03.

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Abstract: The paper presents the characteristics of metallurgical slags and copper ore fragments from the Kamenny Ambar settlement of the Bronze Age. According to the mineral and chemical compositions we have distinguished two types of the slags: Cr-rich spinel containing olivine slags and sulfide-containing olivine slags. The Cr-rich spinel containing olivine slags are the product of oxidized ore from the copper deposits in ultramafic rocks exploited in the early Sintashta-Petrovka period the settlement functioning. The sulfide-containing olivine slags are the result of the secondary sulfide

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19

Parfenova, Larisa, and Olga Ekimova. "The study of the main soil types and their composition in the Tarnier deposit." E3S Web of Conferences 177 (2020): 04006. http://dx.doi.org/10.1051/e3sconf/202017704006.

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In this paper, soil types found on the territory of the Tarnier deposit of copper pyrite ores are considered. The contents of rock-forming components in the main soil types are determined. The analysis of excesses of permissible concentrations in soils was performed.

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20

Glukhov, A. N. "Base metal mineralization of the Kolyma terrain in Northeast Russia: Overview and genetic classification." LITHOSPHERE (Russia) 19, no. 5 (2019): 717–30. http://dx.doi.org/10.24930/1681-9004-2019-19-5-717-730.

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Research subject. The Prikolyma terrain located in the Northeastern part ofRussia constitutes a long-lived Precambrian thrust-faulted structure hosting numerous Cu, Pb and Zn deposits of different types.Materials and methods. The mineralization of the terrain was examined during a course of research and exploration works over the 2007–2012. The rock geochemistry was studied using ICP-OES analysis at the Stuart Geochemistry and Essay laboratory (Moscow). The microprobe analysis of minerals was carried out at the facilities of the Far Eastern Branch of the Russian Academy of Sciences (Magadan) u

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21

Gerbish, S., S. Ganchimeg, and N. Sodnom. "Multielemental photon activation analysis of copper-molybdenum ores and products of processing using a microtron bremsstrahlung." Journal of Radioanalytical and Nuclear Chemistry Articles 168, no. 2 (1993): 503–11. http://dx.doi.org/10.1007/bf02040533.

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22

Popov, Oleg, Irina Talovina, Holger Lieberwirth, and Asiia Duriagina. "Quantitative Microstructural Analysis and X-ray Computed Tomography of Ores and Rocks—Comparison of Results." Minerals 10, no. 2 (2020): 129. http://dx.doi.org/10.3390/min10020129.

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Profound knowledge of the structure and texture of rocks and ores as well as the behavior of the materials under external loads is essential to further improvements in size reduction processes, particularly in terms of liberation size. New analytical methods such as computer tomography (CT) were adopted to improve the understanding of material characteristics in rocks and ores relevant to mineral processing, particular the crushing and grinding and the modelling/simulation thereof. Results obtained on the texture and structure of identical samples of rather different rocks and ores (copper ore

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23

Borkowski, Przemyslaw J. "Comminution of Copper Ores with the Use of a High-Pressure Water Jet." Energies 13, no. 23 (2020): 6274. http://dx.doi.org/10.3390/en13236274.

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The article presents research on the comminution of copper ore in a self-constructed mill using high-pressure water jet energy to investigate the usefulness of such a method for comminuting copper ore. As a result, ore particles are obtained that are characterized by appropriate comminution and a significant increase in their specific surface, in turn allowing for potential further processing of the mineral. A comparative analysis of the efficiency of copper ore comminution, primarily taking into account the unit energy consumption and the efficiency of the milling process, clearly indicates t

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24

Krawczykowska, Aldona, Kazimierz Trybalski, and Damian Krawczykowski. "The Application of Modern Techniques and Measurement Devices for Identification of Copper Ore Types and Their Properties / Wykorzystanie nowoczesnych technik i urządzeń pomiarowych do identyfikacji typów rud miedzi i ich właściwości." Archives of Mining Sciences 58, no. 2 (2013): 433–48. http://dx.doi.org/10.2478/amsc-2013-0029.

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The paper concerns the application of modern methods and research techniques for investigations of copper ore properties. It presents the procedure and tools which, when put together, can constitute a source of information on properties of different products of processing and, simultaneously, can be used in the process control and optimization. The copper ore of one of the branches of the KHGM Polska Miedz plc was investigated. The ore samples represented each of the three lithological types occurring in the Polish deposits, i.e. carbonate, shale and sandstone ores. The paper presents the resu

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Kryukov, Viktor G., Natalya A. Lavrik, Natalya M. Litvinova, and Valentina F. Stepanova. "Typomorphic minerals oxidation zone of gold-copper porphyry ore of the Malmyzh deposit (Svoboda)." Georesursy 21, no. 3 (2019): 91–98. http://dx.doi.org/10.18599/grs.2019.3.91-98.

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The Malmyzh gold-copper porphyry deposit located in the central part of the Khabarovsk region has a rather developed oxidation zone. The object was identified during the exploration and evaluation work in the 70s, but received a negative assessment in terms of prospects for ore gold. LLC “Amur-Minerals” began to geological study of Malmyzh zone in 2005. Exploration work continues at the present time. The mineral composition of primary ore deposits is well studied. While the common minerals like a limonite and goethite are marked for the oxidation zone the most of minerals that may have a typom

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26

Mansurov, M. I., B. H. Galandarov, U. I. Karimli, and A. I. Huseynov. "Distribution of Gold and Associated Ore-Bearing Elements in Gold-Copper-Pyrite Ores of the Kyzylbulag Deposit (Lesser Caucasus, Azerbaijan)." UNIVERSITY NEWS. NORTH-CAUCASIAN REGION. NATURAL SCIENCES SERIES, no. 3 (207) (October 2, 2020): 51–59. http://dx.doi.org/10.18522/1026-2237-2020-3-51-59.

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The article presents the results of studies of the distribution of gold and associated ore elements in gold-copper pyrite ores of the Kyzylbulag deposit. It was established that the elemental composition of ores and host rocks of the deposit includes Cu, Pb, Au, Ag, Ni, As, Sb, Bi, and Mo, of which Au, Cu, Ag, and Zn are the more stable. The behavior of elements was also studied for the entire ore body, as a result of which they are divided by cluster analysis at R (5 %) - 0.1 into two groups: 1) Au, Cu and Ag; 2) Pb and Zn. The closest relationship in the first group was found between Au and

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27

Duryagina, Asiya, Gerhard Heide, Irina Talovina, and Arturo Bravo. "Mineralogical and morphometric aspects of the rock analysis as the basis for choosing a scheme for ore preparation." E3S Web of Conferences 192 (2020): 02023. http://dx.doi.org/10.1051/e3sconf/202019202023.

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The complexity of deep processing of fine-grained and refractory mineral raw materials is determined by the difficulty of disclosing aggregates of ore components during disintegration and extracting them into commercial products of standard quality. The main task of the disintegration of such ores is to destroy the object along the phase boundaries without overgrinding while minimizing energy costs. To implement selective disintegration, a precise study of the properties of the mineral components of the ore is necessary. However, there are no systematic data on the effect and relationship of t

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Kłeczek, Zdzisław, Zygmunt Niedojadło, Edward Popiołek, et al. "Mining Hazards Analysis with Simultaneous Mining Copper Ores and Salt Deposits in LGOM (Legnica-Głogów Copper Belt) Mines with Regard to Dynamic Influences." Archives of Mining Sciences 61, no. 3 (2016): 553–70. http://dx.doi.org/10.1515/amsc-2016-0040.

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Abstract In the case of locating two bedded deposits of different mineral resources in a small vertical distance, additional or increased mining hazards can occur (deformations of the rock mass, crumps and mining shocks, hazards to the land surface). This paper has thoroughly examined the impact of exploitation of the lower-located deposit of copper ore on the higher-located deposit of salt as well as the reverse situation as regards the dynamic phenomena, being the greatest lithospheric hazard in LGOM. At the same time theoretical models of processes were applied, verified by previous observa

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29

SOKOLOV, Igor, Yury ANTIPIN, and Artem ROZHKOV. "MODERNIZATION OF THE MINING SYSTEM OF SMALL DEPOSITS OF RICH COPPER PYRITE ORES." Sustainable Development of Mountain Territories 12, no. 3 (2020): 444–53. http://dx.doi.org/10.21177/1998-4502-2020-12-3-444-453.

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The purpose work. Substantiation and selection of a safe and effective option of mining technology of the experimental block in the pilot industrial mining of the Skalistoe deposit. Method of research. Analysis and synthesis of project solutions, experience in mining inclined low-thickness ore bodies, economic and mathematical modeling and optimization of the parameters of options mining systems in the conditions of the experimental block. Results of research. As a result of research it was established: - the sublevel caving mining system with the parameters adopted in the project does not gua

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30

Nowak, Izabella. "Practical aspects of estimating the quantitative mineral composition of copper-bearing sedimentary rocks on the basis a calculation procedure analogical to the CIPW norm." Biuletyn Państwowego Instytutu Geologicznego 472, no. 472 (2018): 155–70. http://dx.doi.org/10.5604/01.3001.0012.6912.

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The paper presents a possibility of estimating the content of ore minerals based on chemical analyses of copper-bearing sedimentary rock samples from the North-Sudetic Synclinorium and from the Fore-Sudetic Monocline using a calculation procedure similar to the CIPW norm. The mineralogical data was obtained by means of an optical microscope and an electron microprobe (EPMA). The quantitative composition of gangue minerals was determined using the XRD method, and of the ores by the computer microscopic image analysis (CAMI). The actual set of gangue and ore minerals, their chemical composition,

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Gale, N. H., and Z. A. Stos-Gale. "Oxhide Copper Ingots in Crete and Cyprus and the Bronze Age Metals Trade." Annual of the British School at Athens 81 (November 1986): 81–100. http://dx.doi.org/10.1017/s0068245400020098.

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Lead isotope and neutron activation analyses of second millennium BC copper ingots are described. Examples from Cyprus, from the Mathiati hoard, and from Skouriotissa are consistent, and show similarities with Late Cypriot bronze artefacts from Hala Sultan Teke and Ayios Dhimitrios. Analysis of the Hagia Triada ingots shows that these Cretan examples were not imports from Cyprus. The possibility that they used Cretan ores is discussed and rejected. It is tentatively suggested they may be of Anatolian origin. It is clear that the Late Bronze Age metal trade was organized on a more complex basis

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Mamonov, Sergei. "Technological characteristics of sulfide-magnetite ore washability at the magnetite skarn Peschanskoe deposit." Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal, no. 4 (June 25, 2021): 45–56. http://dx.doi.org/10.21440/0536-1028-2021-4-45-56.

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Introduction. In the magnetite lime-skarn Peschanskoe deposit, the Zapadno-Peschanskaya ore deposit is distinguished, which differs from other ore bodies by an increased content of copper and precious metals. Due to the fact that the technology of processing magnetite ores of the Peschanskoe deposit at the enterprise of the subsurface user is configured to receive only iron concentrate, the development of a comprehensive technology for processing sulfide-magnetite ores is an urgent task. Research aim is to study the material composition and sulfide-magnetite ore concentration of the ZapadnoPes

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Song, Jin Long, Shuang Jiang Liu, and Cheng Ying Jiang. "Bioleaching of Chalcopyrite by Thermophilic Archaea." Advanced Materials Research 1130 (November 2015): 338–41. http://dx.doi.org/10.4028/www.scientific.net/amr.1130.338.

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Bioleaching and biooxidation of sulfidicores and concentrates generate very high acidities and a great of heat, which rise the temperature in the reactors or heaps, and accumulate the sulfur on the surface of the ores. Extremely thermoacidophilic archaea, mainly from the genus ofAcidianus, Sulfolobus,Metallosphaeraandsulfurisphaera, have great potential to contribute to biomining processes for their inherent tolerance for low pH, high temperature, and high-soluble metal concentrations. Species of the genusMetallosphaeratypically grow by aerobic respiration on CO2with S0, tetrathionate (S4O62+)

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Pashkova, Galina V., Victor M. Chubarov, Timur F. Akhmetzhanov, et al. "Total-reflection X-ray fluorescence spectrometry as a tool for the direct elemental analysis of ores: Application to iron, manganese, ferromanganese, nickel-copper sulfide ores and ferromanganese nodules." Spectrochimica Acta Part B: Atomic Spectroscopy 168 (June 2020): 105856. http://dx.doi.org/10.1016/j.sab.2020.105856.

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35

Haglund, Dan. "Regulating FDI in weak African states: a case study of Chinese copper mining in Zambia." Journal of Modern African Studies 46, no. 4 (2008): 547–75. http://dx.doi.org/10.1017/s0022278x08003480.

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ABSTRACTChina's engagement with African countries is growing rapidly, spanning trade, investment and development cooperation. Some observers have suggested that poor operating standards among Chinese investors may contribute to the social ills associated with extractive industries and undermine host countries' sustainable development. Drawing on case study data from the copper mining sector in Zambia, this paper argues that the economic and political context surrounding Chinese investment risks undermining the effectiveness of local environmental, social and fiscal regulation. The analysis fir

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Imasiku, K., and E. Ntagwirumugara. "Sustainable energy supply and business collaborations for sustainability, resilience and competitiveness in the Zambian copper industry after Covid-19." Journal of Energy in Southern Africa 32, no. 1 (2021): 97–108. http://dx.doi.org/10.17159/2413-3051/2021/v32i1a8083.

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The mining industry in Zambia is energy-intensive, with hydro energy providing the required energy. But other sources of energy may need to be added, because hydro energy is subject to good rain patterns, threatened by the spectre of climate change, as already indicated by the current prolonged hours of load shedding by state-owned , Zambia Electricity Supply Company. This research looks at state-of-art mining technologies and collaborative business processes that leverage on the expected ramp in copper and cobalt (Cu-Co) global demand post-Covid-19, to help design resilient business systems b

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Galevskii, G. V., O. A. Polyakh, V. V. Rudneva, and A. E. Anikin. "Analysis of the current state of molybdenum mineral and raw material base, mining and processing of molybdenum-containing ores." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 76, no. 7 (2020): 665–75. http://dx.doi.org/10.32339/0135-5910-2020-7-665-675.

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Molybdenum has a complex of practically significant properties and is widely used for alloying steels and cast irons, in the composition of alloys of various purposes, as well as a structural material in pure form. Molybdenum belongs to the group of rare metals, which causes the relevance of analytical research of the modern state of the mineral- raw material base of molybdenum, extraction and processing of molybdenum-containing ores. The results of analysis of the mineral-raw material base of molybdenum of foreign countries and Russia, assessment of prospects of its expansion are presented. T

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Abud Louro, Vinicius Hector, Marta Silvia Maria Mantovani, and Vanessa Biondo Ribeiro. "Integrated geologic and geophysical interpretation of the Buraco da Velha copper deposit (Rondônia, Brazil): A basis for exploring in related environments." GEOPHYSICS 82, no. 3 (2017): B121—B133. http://dx.doi.org/10.1190/geo2016-0345.1.

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The Buraco da Velha copper deposit lies at the northern limit of the Parecis Basin in the Colorado Graben, Rondônia, Brazil. New geophysical data indicate the presence of a magnetic source below and to the north of the Buraco da Velha deposit, where it corresponds with high gamma-ray U, Th, and K counts. We have studied the source of the magnetic anomaly and delineated it through derivative transforms, Euler deconvolution, MaxiMin total magnetization direction analysis, staged inverse modeling, Th/K ratio, and radiometric ternary imaging. The magnetic anomaly is elongated in the east–west dire

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Ou, Zhi Yuan, and Jin Hui Li. "A Novel Route for Copper Recovery from Waste Printed Circuit Boards via Mechanochemistry." Applied Mechanics and Materials 768 (June 2015): 569–75. http://dx.doi.org/10.4028/www.scientific.net/amm.768.569.

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This paper mainly introduces a novel route for copper recovery from waste printed circuit boards (WPCBs) via mechanochemistry. Copper in the crust is most commonly present as copper-iron-sulfide and copper-sulfide minerals (about 80%) and there exist many methods to extract copper from cooper ores in mineral engineering. It seems an alternative to transform the metallic components in obsolete materials to their corresponding compounds common in nature. By means of mechanochemistry, copper and sulfur were verified to form into copper sulfide in the model experiment, where, meanwhile, the optima

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Ucurum, Ali, Cigdem Sahin Demir, Nazmi Otlu, et al. "Re-Os Age and Stable Isotope (O-H-S-Cu) Geochemistry of North Eastern Turkey’s Kuroko-Type Volcanogenic Massive Sulfide Deposits: An Example from Cerattepe-Artvin." Minerals 11, no. 2 (2021): 226. http://dx.doi.org/10.3390/min11020226.

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The eastern Pontide tectonic belt (EPTB) contains greater than 350 identified Kuroko type volcanogenic massive sulfide deposits/mineralization/occurrences (VMSD). The deposits are associated with Late Cretaceous felsic volcanics consisting mainly of dacitic and rhyolitic lavas and pyroclastics that outcrop within a narrow zone running parallel to the eastern Black Sea coast and represent the axial zone of a paleo-magmatic arc. The Cerattepe deposit is the second-largest and is a hybrid VMS system with some epithermal features. To date, no geochemical research constrains the origin and timing o

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Remonsellez, Francisco, F. Galleguillos, Sonestie Janse van Rensburg, et al. "Monitoring of Microbial Community Inhabiting a Low-Grade Copper Sulphide Ore by Quantitative Real-Time PCR Analysis of 16S rRNA Genes." Advanced Materials Research 20-21 (July 2007): 539–42. http://dx.doi.org/10.4028/www.scientific.net/amr.20-21.539.

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Microbial heap bioleaching is being used as an industrial process to recover copper from low grade ores. It is known that a consortium of different microorganisms participates in this process. Therefore identification and quantification of communities inhabiting heap bioleaching operations is a key step for understanding the dynamics and role of these microorganisms in the process. A quantitative real-time PCR approach was used to investigate the microbial dynamics in this process. To study the microbial population inhabiting a low-grade copper sulphide ore bioleaching industrial heap process

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Kiss, Viktória. "Transformations of Metal Supply during the Bronze Age in the Carpathian Basin." Hungarian Historical Review 9, no. 2 (2020): 315–30. http://dx.doi.org/10.38145/2020.2.315.

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This paper presents recent research questions which have been raised and methods which have been used in the study of Bronze Age metallurgy in connection with available natural resources (ores) in and around the Carpathian Basin. This topic fits in the most current trends in the research on European prehistoric archaeology. Given the lack of written sources, copper and bronze artifacts discovered in settlement and cemetery excavations and prehistoric mining sites provide the primary sources on which the studies in question are based. The aim of compositional and isotope analysis of copper and

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Liu, Mei Hua, Yi Qiang Liang, Sheng Jian, and Xu Dong Zhang. "Flotation of a Copper-Lead Sulfide-Oxide Ore：Using a Combined Depressant for Galena and an Effective Activator D2 for Copper Oxide Minerals." Advanced Materials Research 634-638 (January 2013): 3368–74. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.3368.

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The properties of a Cu-Pb oxide ore are investigated by XRD and SEM. Results show that the ore is characterized by chalcocite, galena, azurite and cerusite. Copper and lead phases analysis show that the oxidation rates of copper and lead are up to 70% and 72%, respectively. In order to get a good flotation performance for the difficult-to-treat ore, an efficient flotation technology of bulk flotation of Cu-Pb sulfides，separation of Cu-Pb sulfides, copper and lead oxides flotation has been developed. By applying the combined depressants (sodium thiosulfate + peroxide), activator Disulhydroxyben

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Wang, Ping, Bret Howard, Nicholas Means, Dushyant Shekhawat, and David Berry. "Coal Chemical-Looping with Oxygen Uncoupling (CLOU) Using a Cu-Based Oxygen Carrier Derived from Natural Minerals." Energies 12, no. 8 (2019): 1453. http://dx.doi.org/10.3390/en12081453.

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Chemical-looping with oxygen uncoupling (CLOU) is considered a promising technology to burn solid fuels with improved CO2 capture and has the potential to improve fuel conversion and reaction rates. Cu-based oxygen carriers (Cu-OC) are often used in solid fuel CLOU. This study focused on investigating Cu-OC derived from a natural mineral for solid fuel CLOU because of their potentially lower cost compared to synthetic OCs. Reactivity and recyclability of a natural ore-derived Cu-OC on coal char (Powder River Basin sub-bituminous coal) were studied at 900 °C in Ar and air using TGA-QMS and fixe

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Solikhov, M. M., A. V. Aksenov, M. I. Karimov, G. G. Mineev, and O. B. Rakhmanov. "An optimal technological scheme for flotation concentration of gold-copper-arsenic ores of the Taror deposit (Republic of Tajikistan)." Proceedings of Irkutsk State Technical University 25, no. 4 (2021): 498–508. http://dx.doi.org/10.21285/1814-3520-2021-4-498-508.

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This article investigates the effect of material size on the efficiency of flotation concentration of gold-copperarsenic ores of the Taror deposit (Republic of Tajikistan) and studies the dependence of gold recovery on the duration of the process with the purpose of developing an alternative technological scheme for processing this ore type. According to X-ray phase analysis, Taror ore samples consist of rock-forming minerals by 92%. Ore mineralization is represented by sulphide minerals, mainly arsenopyrite, chalcopyrite and pyrite, in the total amount of 8%. Ore-forming elements include iron

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Bostelmann, Heike, and Gordon Southam. "A Column Leaching Model of Low-Grade Chalcopyrite Ore: Mineral Preferences and Chemical Reactivity." Minerals 10, no. 12 (2020): 1132. http://dx.doi.org/10.3390/min10121132.

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Bioleaching models to examine copper extraction from low-grade chalcopyrite ores were set up to identify the influence of pyrite on leaching efficacy. A combination of scanning electron microscopy and geochemical analysis showed that extraction was marginally enhanced by the addition of pyrite when using a combination of Leptospirillum ferrooxidans, an iron oxidiser, Acidithiobacillus thiooxidans, a sulphur oxidising species and Acidithiobacillus ferrooxidans, an iron and sulphur oxidiser. Extensive biofilms formed on the pyrite surfaces (>106 cells/mm2) but were severely limited on chalcop

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Shaybekov, R. I., B. A. Makeev, N. N. Kononkova, S. I. Isaenko, and E. M. Tropnikov. "Palladium tellurides and bismuthtellurides in sulfide copper-nickel ores of the Savabeisky ore occurrence (Nenets Autonomous District, Russsia)." LITHOSPHERE (Russia) 21, no. 4 (2021): 574–94. http://dx.doi.org/10.24930/1681-9004-2021-21-4-574-594.

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Research subject. The Savabeisky sulfide copper-nickel ore occurrence, located in the central part of the Khengur (Central Pay-Khoy) gabbro-dolerite complex of the Pay-Khoy, within the Yugorsky Peninsula, located in the Far North-East of the European part of Russia, in the Arkhangelsk region, between the Barents and Kara Seas.Materials and methods. Samples of copper-nickel ores with noble metal mineralization were studied. Palladium tellurides and bismuthtellurides were characterized using optical and scanning electron microscopy, electron backscatter diffraction (EBSD), X-ray structural analy

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Vera, Mario, Claudia Janosch, Sören Bellenberg, Beate Krok, Wolfgang Sand, and Ansgar Poetsch. "New Insights into the Biofilm Lifestyle and Metabolism of Acidithiobacillus Species from Analysis of High Throughput Proteomic Data." Advanced Materials Research 825 (October 2013): 111–14. http://dx.doi.org/10.4028/www.scientific.net/amr.825.111.

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Bioleaching is the extraction of metals, such as copper or gold, from sulfidic ores by microorganisms. Their energy for growth is obtained by oxidation of ferrous iron and/or reduced inorganic sulfur compounds. Bacterial attachment to ores increase leaching activities through the formation of a special microenvironment between the bacterium and the metal sulfide surface, filled by extracellular polymeric substances (EPS). Recently, a high-throughput proteomic comparison from biofilm cells attached to pyrite (FeS2) and planktonic cells of the mesophilic iron and/or sulfur oxidizer Acidithiobaci

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Karimov, Kirill, Andrei Shoppert, Denis Rogozhnikov, Evgeniy Kuzas, Semen Zakhar’yan, and Stanislav Naboichenko. "Effect of Preliminary Alkali Desilication on Ammonia Pressure Leaching of Low-Grade Copper–Silver Concentrate." Metals 10, no. 6 (2020): 812. http://dx.doi.org/10.3390/met10060812.

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Ammonia leaching is a promising method for processing low-grade copper ores, especially those containing large amounts of oxidized copper. In this paper, we study the effect of Si-containing minerals on the kinetics of Cu and Ag leaching from low-grade copper concentrates. The results of experiments on the pressure leaching of the initial copper concentrate in an ammonium/ammonium-carbonate solution with oxygen as an oxidizing agent are in good agreement with the shrinking core model in the intra-diffusion mode: in this case, the activation energies were 53.50 kJ/mol for Cu and 90.35 kJ/mol fo

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Duff, Deanne, Charles Hurich, and Sharon Deemer. "Seismic properties of the Voisey’s Bay massive sulfide deposit: Insights into approaches to seismic imaging." GEOPHYSICS 77, no. 5 (2012): WC59—WC68. http://dx.doi.org/10.1190/geo2011-0483.1.

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Seismic methods offer significant potential advantages for minerals exploration over more traditional geophysical techniques because of the comparatively high resolution of seismic imaging. This is particularly true as minerals exploration is required to explore deeper to find resources. However, adaptation of seismic imaging techniques to the complex crystalline targets common in the mining environment requires a thorough understanding of the physical properties of the specific combination of ore and host rocks under consideration to choose an appropriate imaging technique. Analysis of the su

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