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Artigos de revistas sobre o tema "Copper ores"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 8 de outubro de 2024

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1

Kenzhaliyev, Bagdaulet, Aigul Koizhanova, Tatiana Chepushtanova, Arailym Mukangaliyeva, and David Magomedov. "INNOVATIVE METHODS FOR PROCESSING COPPER ORES IN KAZAKHSTAN: A COMPREHENSIVE APPROACH TO ENHANCING THE EFFICIENCY OF VALUABLE COMPONENT EXTRACTION." SERIES CHEMISTRY AND TECHNOLOGY, no. 3 (October 1, 2024): 124–36. http://dx.doi.org/10.32014/2024.2518-1491.241.

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This article presents an innovative approach to processing copper ore from one of the deposits in Kazakhstan, aimed at enhancing the efficiency of copper extraction from materials with a complex mineral composition. The described methodology includes several key stages: comprehensive analysis of the ore's material composition, gravity and flotation beneficiation, as well as hydrometallurgical processes. During the study, the ores underwent preliminary preparation, including crushing and grinding to the required fineness. Experiments on gravity and flotation beneficiation demonstrated that opti

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2

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 In

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3

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),

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4

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 a

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5

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 a

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6

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.

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7

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

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8

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.

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9

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

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10

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 co

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11

Chaerun, Siti Khodijah, Frideni Yushandiana Putri, Mohammad Zaki Mubarok, Wahyudin Prawira Minwal, and Zela Tanlega Ichlas. "Bioleaching of Supergene Porphyry Copper Ores from Sungai Mak Gorontalo of Indonesia by an Iron- and Sulfur-Oxidizing Mixotrophic Bacterium." Solid State Phenomena 262 (August 2017): 20–23. http://dx.doi.org/10.4028/www.scientific.net/ssp.262.20.

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Environmentally friendly mining technologies have to be developed extensively to avoid the impact of mining activities with respect to environmental concern. One example of such technology is bioleaching which has been developed worldwide and is regarded as an appropriate technology for the extraction of metals from polymetallic ores such as supergene porphyry copper ores, mainly consisting of secondary copper sulfides, including chalcocite (Cu2S), covellite (CuS), or oxide minerals, i.e., cuprite (Cu2O) and tenorite (CuO). The extraction process for this complex ore generally requires high te

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12

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

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13

Gayar, El Sayed El, and M. P. Jones. "A Possible Source of Copper Ore Fragments Found at the Old Kingdom Town of Buhen." Journal of Egyptian Archaeology 75, no. 1 (August 1989): 31–40. http://dx.doi.org/10.1177/030751338907500104.

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An archaeological investigation of the Old Kingdom town of Buhen in 1962 revealed an ancient copper ‘factory’, some copper ore fragments from which have been examined by modern analytical methods. The results show that the main copper-bearing mineral in the ore is malachite but this has been extensively altered (in situ) to the green copper chloride, atacamite. The ore also contains a very high proportion of gold. The mineralogy of the ‘Buhen’ ore has been compared with known copper ores from Egypt and Northern Sudan. These other ores either do not match the Buhen specimens or they occur very

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14

Zhang, Chi, Xiao Dong Jia, Ya Lin Lu, Dian Wen Liu, and Xiao Lin Zhang. "Review on New Process and New Reagent of Copper Oxide." Advanced Materials Research 1010-1012 (August 2014): 1618–21. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1618.

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The paper briefly analyzes and systematically summarizes flotation process and chemical treatment method of low-grade oxidized copper ores in recent years. The new high-efficient collectors and system of reagent combined usage are developed widely and have become an important research direction of oxidized copper ores.

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15

Zhang, Tie Min, Zhi Cong Wei, and Ying Bo Mao. "Ammonia Leaching Study on Refractory Oxidised Copper Ores." Applied Mechanics and Materials 563 (May 2014): 53–56. http://dx.doi.org/10.4028/www.scientific.net/amm.563.53.

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Ammonia leaching research is carried out on a certain oxidised copper ores. The effects of oxidized copper ores which came from Yunnan Province were studied in laboratory in order to find out the optimum leaching conditions under normal temperature and pressure. The ores belonged to typical high binding rate minerals. The optimum conditions obtained were as follows: granding fineness about 90% -0.074mm, ammonia concentration 2 mol/l, ammonium fluoride concentration 1.5mol/l , leaching time 2h, and liquid-solid ratio 3:1.The leaching rate of this ore could reach 86%.

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16

Jiang, Tai Guo, Jian Jun Fang, Tie Min Zhang, Shan Wang, and Ying Bo Mao. "The Effect of Different Collectors on Oxidised Copper Ores Flotation." Advanced Materials Research 962-965 (June 2014): 814–17. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.814.

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For a refractory oxidised copper ores in Sichuan province, studing the different collectors on the influence of oxidised copper ores sulfide flotation behavior. The results showed that: the collecting performance of sodium isoamylxanthate was better. When the dosage of sodium isoamylxanthate was 550g/t, the copper concentrate grade of 19.09% could be obtained and recovery was 82.65% under the appropriate process conditions in the closed circuit experiment.

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17

DENG, TONG, and JIAYONG CHEN. "Treatment of Oxidized Copper Ores with Emphasis on Refractory Ores." Mineral Processing and Extractive Metallurgy Review 7, no. 3-4 (April 1991): 175–207. http://dx.doi.org/10.1080/08827509108952671.

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18

Jiang, Tai Guo, Zhi Chong Wei, and Tie Min Zhang. "Study on the Beneficiation of an Oxidised Copper Ores in Yunnan Province." Applied Mechanics and Materials 631-632 (September 2014): 641–45. http://dx.doi.org/10.4028/www.scientific.net/amm.631-632.641.

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For a refractory oxidised copper ores in Yunnan province, studing the beneficiation of a oxidised copper ores sulfide flotation behavior. The results showed that: When ethylenediamine phosphate was added with the dosage of 120 g/t, the final copper concentrates were gained with the grade of 21.06% and recovery of 83.20%. Compared to the direct sulfide flotation, the concentrate grade was raised by 3.59% and the recovery was increased by 7.33%.

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19

RYLNIKOVA, M. V., G. I. AYNBINDER, N. A. MITISHOVA, and L. A. GADZHIEVA. "RESEARCHING REGULATIONS OF FIRE SULFIDE ORE AND BREED DURING COMBINED DEPOSIT DEVELOPMENT." News of the Tula state university. Sciences of Earth 2, no. 1 (2020): 341–56. http://dx.doi.org/10.46689/2218-5194-2020-2-1-341-356.

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Mineralogical and mineralogical-graphic analyzes of samples of the host and ore-bearing rocks of copper-zinc-pyrite deposits were carried out. The Program and the corresponding research methods offactors and patterns of development of the oxidation processes of sulfide ores and rocks have been developed and tested. The results of chemical-technological studies of sulfur-pyrite, copper-pyrite, copper-zinc ores, sericite-quartz rocks and metamorphosed tuffs are presented.

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20

Ivasenko, I. B., R. A. Vorobel, V. M. Uchanin, O. R. Berehulyak, and T. S. Mandziy. "Detection of chalcopyrite in digital images of copper ore sample sections." Information extraction and processing 2023, no. 51 (December 14, 2023): 52–61. http://dx.doi.org/10.15407/vidbir2023.51.052.

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Copper ores are mineral formations of natural origin, the concentration of copper or copper compounds in which is sufficient for their commercial mining. Because of this, copper ores are on the list of minerals that are of strategic importance for the sustainable development of the economy and defense capability of Ukraine. In addition, due to the high thermal conductivity, copper and its alloys are widely used for the manufacture of various types of heat exchangers and radiators. The content of copper in ores usually ranges from 1 to 5%; ores containing less than 0.5% copper are unprofitable

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21

Ignatkina, V. A., V. A. Bocharov, A. R. Makavetskas, A. A. Kayumov, D. D. Aksenova, L. S. Khachatryan, and Yu Yu Fishchenko. "RATIONAL PROCESSING OF REFRACTORY COPPER-BEARING ORES." Izvestiya Vuzov Tsvetnaya Metallurgiya (Proceedings of Higher Schools Nonferrous Metallurgy, no. 3 (June 14, 2018): 6–18. http://dx.doi.org/10.17073/0021-3438-2018-3-6-18.

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The paper presents the results obtained when studying material compositions of four samples of refractory copper-bearing ores from the Uzelga deposit along with technological solutions to improve their processing parameters. The refractoriness of ores is associated with a thin dissemination (up to a micron size) and close intergrowth of ore and rock minerals. Ferrous sulfides are represented by a wide range of minerals: pyrite, marcasite and their variety melnikovite, arsenic pyrite and arsenopyrite; sooty melnikovite has a higher flotation activity. The reduction of iron sulfides from 89 to 2

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22

Jiang, Tai Guo, Jian Jun Fang, Tie Min Zhang, Shan Wang, and Ying Bo Mao. "The Effects of Different Depressants on Oxidised Copper Ores Flotation." Advanced Materials Research 915-916 (April 2014): 1118–23. http://dx.doi.org/10.4028/www.scientific.net/amr.915-916.1118.

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For refractory oxidised copper ores of Huidong Sichuan province, studing the different depressants on the influence of oxidised copper ores flotation behavior. The results showed that: the depressanting effect of the combination of sodium hexametaphosphate primarily is better. When the dosage of the combination of sodium hexametaphosphate and sodium humate reagent is 300 g/t, ratio is 2:1,the recovery of copper concentrate is 83.31and the grade is 19.01 in the closed circuit experiment.

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23

Medina, Diego, and Corby G. Anderson. "A Review of the Cyanidation Treatment of Copper-Gold Ores and Concentrates." Metals 10, no. 7 (July 5, 2020): 897. http://dx.doi.org/10.3390/met10070897.

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Globally, copper, silver, and gold orebody grades have been dropping, and the mineralogy surrounding them has become more diversified and complex. The cyanidation process for gold production has remained dominant for over 130 years because of its selectivity and feasibility in the mining industry. For this reason, the industry has been adjusting its methods for the extraction of gold, by utilizing more efficient processes and technologies. Often, gold may be found in conjunction with copper and silver in ores and concentrates. Hence, the application of cyanide to these types of ores can presen

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24

Jikia, Nana, Demur Talakhadze, and Anzor Abshilava. "Processing Questions of Madneuli Copper Enrichment Plant Tails." Works of Georgian Technical University, no. 2(528) (May 29, 2023): 47–54. http://dx.doi.org/10.36073/1512-0996-2023-2-47-54.

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Madneuli copper enrichment plant works since 1975. This plant works on copper sulphide ores from Madneuli and Sakdrisi deposits. In some ores due to difficulties of blotting secondary copper sulphides, recovery of copper in commercial production is low – 60-65%. At the same time, concentration of copper in tails is 0.17-0.19% and concentration of gold in tails 0.3-0.6 gr/t. In this article we consider combine technology of processing rich flotation tiles: preinrichment by gravity (use centrifugal concentrator and/or short noise hydrocyclone). Gravity concentrate with au and cu 5.47 gr/t, and 0

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25

Ranjbar, M., M. Schaffie, Mohammad Pazouki, R. Ghazi, A. Akbary, S. Zanddevakili, S. A. Seied Baghery, and Z. Manafi. "Application Potential of Biohydrometallurgy in the Iranian Mining Industry." Advanced Materials Research 20-21 (July 2007): 38–41. http://dx.doi.org/10.4028/www.scientific.net/amr.20-21.38.

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Several studies and different successful commercial applications had demonstrated that bioleaching can be an innovative approach that is capable to provide mining industry opportunities for essential growth in the medium term[2-18]. To identify the commercial application potential of bioleaching in Iranian copper industry, a research program was initiated. The objective of the main part of this program was to evaluate bacterial leaching processes for copper recovery from (i) high grade ores and flotation concentrates and (ii) low grade ores and flotation tailings. The latest results of these s

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26

Liang, Yi Li, Hua Qun Yin, Yun Hua Xiao, Min Tang, Xue Feng, Zhi Yong Xie, Guan Zhou Qiu, and Xue Duan Liu. "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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27

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 (August 11, 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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Díaz, José, Jennyfer Serrano, and Eduardo Leiva. "Bioleaching of Arsenic-Bearing Copper Ores." Minerals 8, no. 5 (May 17, 2018): 215. http://dx.doi.org/10.3390/min8050215.

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Sayitov, Sardor S., Vladimir D. Tsoi, Shohruh M. ugli Rasulov, Ruslan D. Pechersky, Alina V. Rasulova, Azimjon К. ugli Abduvaitov, and Azamat А. ugli Asrorov. "Material composition of copper slag of the Almalyk copper-smelting plant (Uzbekistan)." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 335, no. 4 (April 25, 2024): 148–58. http://dx.doi.org/10.18799/24131830/2024/4/4292.

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Relevance. Copper production is accompanied by release of a large volume of slag. Today, huge quantities of copper slags have accumulated all over the world, in which the copper content is even greater than that in original ores. The slags that result from the smelting of ores and concentrates of both ferrous and non-ferrous metals, together with other metallurgical wastes such as tailings, are increasingly the subject of significant environmental controversy. The only way to reduce the negative impact of slag waste on the environment can be their disposal, by complex extraction of valuable co

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KOZHONOV, Almaz, Valentin CHANTURIA, Kulgamal NOGAEVA, and Yessil ALPIEV. "Technological basis of processing skarn copper-gold-bearing ores of the Kyrgyz Republic." Sustainable Development of Mountain Territories 15, no. 3 (September 30, 2023): 693–706. http://dx.doi.org/10.21177/1998-4502-2023-15-3-693-706.

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Introduction. The paper studies the matters of processing of skarn copper-gold ores from a deposit in the Kyrgyz Republic. Materials and methods. As a study task, the authors performed an analysis of the material composition, including micro- and macroscopic types of analyses are presented. Results. Textural-structural analysis and mineralogical characteristics of the main ore minerals is detailed. The characteristic features of the material composition of the studied types of ores are highlighted and described. The reagent suite for processing of skarn ores has been established by means of ad

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31

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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NAKAMURA, Hidekatsu, Muneyuki TAMURA, Tadashi CHIDA, and Naoki SATO. "Acceleration of Copper Leaching of Secondary Copper Sulfide Ores." Journal of MMIJ 126, no. 6 (2010): 184–89. http://dx.doi.org/10.2473/journalofmmij.126.184.

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Liu, Dian Wen, Jian Jun Fang, Xiao Lin Zhang, Shu Ming Wen, Zhi Cong Wei, Shao Jun Bai, Bing Liang Xu, and Wen Bin Zhang. "Sulfidisation Promotion Effect of Ammonium Sulfate on Flotation of Copper Oxide Ore." Advanced Materials Research 524-527 (May 2012): 1109–14. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.1109.

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This paper presents the sulfidisation promotion effect of ammonium sulfate on the sulfidisation flotation of both malachite and copper oxide ores. Copper oxide ores are commonly difficult-to-float due to its molecular structure, and adding sodium sulfide as activator is necessary; however, its dosage to the flotation pulp must be strictly controlled, as it is also a powerful depressant for copper sulfide minerals, and will, if in excess, depress the activated copper oxide minerals. This depression will be alleviated while ammonium sulfate is added, as it accelerates the speed of sulfidisation,

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Xiong, Fei, Yan Jun Li, Zheng Zhang, Guo Fang Du, and Yao Zhong Lan. "Application of Chelating Collectors in the Flotation of Copper Minerals." Advanced Materials Research 868 (December 2013): 417–22. http://dx.doi.org/10.4028/www.scientific.net/amr.868.417.

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The application of new chelating reagents on the flotation of copper minerals has been paid much attention in recent years. These collectors have successfully extracted the copper minerals from the low-grade refractory ores, and one of the most important collectors is the alkylhydroxamate-based chelating reagent which shows the excellent flotation performance to the copper oxide minerals. Furthermore, the mixture of various chelating reagents can recover the copper sulfides and oxides simultaneously from the complicated copper ores, which is attributed to the synergy among collectors. Thus we

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Konareva, Tatiana, and Maxim Kirilchuk. "Research of combined reagent schemes of activation leaching of gold from oxidized ores of the Malmyzh field." E3S Web of Conferences 192 (2020): 02020. http://dx.doi.org/10.1051/e3sconf/202019202020.

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The results of studies of the cyanide and an alternative methods for leaching gold and silver from oxidized ores of the Malmyzh field are presented. The possibility of recovering gold and silver from oxidized porphyry copper ores by thiosulfate solutions in agitation and percolation modes without intensifying the process – heating the solutions and adding copper ions – has been shown. Also, in a separate cycle – copper leaching with low-concentration sulfuric acid-sulfite solutions with additional opening of the silicate matrix with ammonium hydrofluoride – has been studied. The possibility of

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Medyanik, Nadezhda L., Anton P. Ponomarev, and Olga V. Yershova. "The Chemical Technology for Producing Precious Metals from Enrichment Rejects of Copper-Pyrite Ores." Solid State Phenomena 316 (April 2021): 625–30. http://dx.doi.org/10.4028/www.scientific.net/ssp.316.625.

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The chemical technology for recovery precious metals Au and Ag from mature flotation tailings of copper-pyrite ores by two-stage sintering with chlorine-ammonium reagents and leaching of bakes with water is developed. The chemical extraction of gold and silver is carried out, using NH4Cl and NH4NO3 reagents in the ratios of 1:1 at a temperature of 250 °C, and 2:1 at 200 °C. In accordance with the obtained results, a chemical technology of enrichment rejects of copper-pyrite ores processing and a scheme of primary apparatus chain for implementing this technology are proposed. The economic effec

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Li, Guo Dong, Li Kun Gao, Hui Xin Dai, and Hai Fang Dong. "Study on Application of Intensifying Depression Talcum in the Copper Sulphide Flotation." Applied Mechanics and Materials 295-298 (February 2013): 3043–49. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.3043.

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Talcum is a common gangue with which sulphide ores are associated, it has an adverse impact on sulphide ores flotation and product index due to its high natural floatability. In this paper it takes talcum-bearing copper sulphide ores from DongChuan in Yunnan province as experimental samples, and a series of tests on depressing talcum in the copper suphide ore flotation were carried out. Results show that when took the composed CMC and sodium hexametaphosphate as depressant with respective dosage 200g/t and 300g/t, it obtained a favourableeffect. In addition, depression effect can get improved

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Li, Xiaohua, Wouter Monnens, Zheng Li, Jan Fransaer, and Koen Binnemans. "Solvometallurgical process for extraction of copper from chalcopyrite and other sulfidic ore minerals." Green Chemistry 22, no. 2 (2020): 417–26. http://dx.doi.org/10.1039/c9gc02983d.

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Liu, Zhengyu, Jue Kou, Lipeng Fan, Weibin Zhang, Jie Tian, Chunbao Sun, Qiang Li, Jiubo Liu, Chengjun Xing, and Guanhua Li. "Research on Enhancing Copper-Ammonia-Thiosulfate Eco-Friendly Gold Leaching by Magnetization of Lixiviant Solution and Their Kinetic Mechanism." Minerals 14, no. 7 (July 8, 2024): 697. http://dx.doi.org/10.3390/min14070697.

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In thiosulfate leaching of gold, the copper-ammonia complex serves as an oxidant and catalyst. This study examined the impact of magnetizing the copper-ammonia thiosulphate lixiviant solution on gold leaching from refractory oxidized ores. Magnetization reduced surface tension, improved wettability and infiltration, and enhanced the diffusion of leaching agents. It also increased dissolved oxygen content and boosted the catalytic efficiency of copper-ammonia complexes. These changes led to more efficient gold extraction, with column leaching showing a 4.74% improvement in extraction rates comp

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Szubert, Agnieszka, Anne-Gwénaëlle Guezennec, Françoise Bodénan, Stefan Dirlich, Agnieszka Pawłowska, Andrzej Grotowski, Zygmunt Sadowski, and Kajetan Witecki. "An update on possibilities of metals recovery from Polish copper ores by biotechnology. Project Ecometals." E3S Web of Conferences 18 (2017): 01015. http://dx.doi.org/10.1051/e3sconf/20171801015.

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The possibilities of metals recovery from copper ores with the biotechnological methods are widely known. The methods consist in bioleaching of copper ores, copper concentrates and byproducts of their production, as well as metals recovery from leaching solutions. Biohydrometallurgical methods were tested for years to be applied at KGHM Polska Miedź S.A., in order to improve efficiency of copper production. Several different research units worked on the topic, and the most significant and wide range initiatives in this area are mentioned in this article. One of the initiatives is an ongoing Ge

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Aikawa, Kosei, Mayumi Ito, Nodoka Orii, Sanghee Jeon, Ilhwan Park, Kazutoshi Haga, Taro Kamiya, et al. "Flotation of Copper Ores with High Cu/Zn Ratio: Effects of Pyrite on Cu/Zn Separation and an Efficient Method to Enhance Sphalerite Depression." Minerals 12, no. 9 (August 30, 2022): 1103. http://dx.doi.org/10.3390/min12091103.

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Porphyry copper deposits are important sources of copper and typically processed by flotation to produce copper concentrates. As mining areas become deeper, the amounts of impurities, such as sphalerite, can be increased in copper ores, so the appropriate depression of sphalerite floatability should be achieved to obtain saleable copper concentrates. In this study, the flotation behaviors of chalcopyrite and sphalerite in model samples mimicking copper ores with high Cu/Zn ratios (i.e., the ratio of chalcopyrite/sphalerite = 13:1) were investigated with zinc sulfate as a depressant for sphaler

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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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Murzin, V. V., G. A. Palyanova, E. V. Anikina, and V. P. Moloshag. "Mineralogy of noble metals (Au, Ag, Pd, Pt) in Volkovskoe Cu-Fe-Ti-V deposit (Middle Urals, Russia)." LITHOSPHERE (Russia) 21, no. 5 (October 31, 2021): 653–59. http://dx.doi.org/10.24930/1681-9004-2021-21-5-643-659.

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Research subject. The mineral compositions of titanomagnetitic (apatite, titanomagnetite) and copper-titanomagnetitic (bornite, chalcopyrite, apatite, titanomagnetite) ores of the Volkovskoe Cu-Fe-Ti-V deposit (Middle Urals, Russia).Methods. The research was carried out using a Jeol JSM-6390LV scanning electron microscope and X-ray spectral microanalyzers JXA-5 (Jeol) at the Geoanalitik Collective Use Center of the IGG UB RAS. Results and conclusions.Native gold (with ≤ 0.3 wt % Pd, 0.2–0.4 wt % Cu; fneness 800–914 ‰), tellurides of Pd, Au and Ag (merenskyite, keithconnite, sylvanite, hessite)

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Grigoriev, S. A. "Development of metallurgy of copper and copper alloys in China in the 2nd millennium BC." VESTNIK ARHEOLOGII, ANTROPOLOGII I ETNOGRAFII, no. 2(57) (June 15, 2022): 31–43. http://dx.doi.org/10.20874/2071-0437-2022-57-2-3.

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The first rare metal finds in China are dated to the Neolithic period, but most of them belong to its final phase. For this period, pure copper is known, very rare arsenic alloys, probably smelted from ore with arsenic admixtures. At the beginning of the 2nd millennium BC, in Gansu, the technology of smelting ore with the following alloying with arsenic, occasionally tin minerals were borrowed from an unknown source. This technology spread to the east, and is present in the Erlitou II layer. At the beginning of the Erlitou III phase (which corresponds to the beginning of the Shang dynasty), th

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Abbas Jasim, Sundus, Sajad Abd Al-kadhum Mohsin, and Maithem Ammory Jaafer. "Production of Copper Powder from Ores by Elecrodeposition Process." Journal of University of Babylon for Engineering Sciences 27, no. 2 (June 10, 2019): 233–41. http://dx.doi.org/10.29196/jubes.v27i2.2342.

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This paper studies the preparation of Copper powder from copper sulphate aqueous solution (CuSO4.5H2O), sulfuric acid (H2SO4) and copper chloride (CuCl2.2H2O) by using the process of electrodeposition. Process of Powder deposition has been investigated for copper powder; it is a fine layer on cathode electrode by using the value of different from time of deposition (15, 30, 45, and 60) min. it is noticed the weight of the powder rises with the rise of time of depostion. Diffractions of X-ray (XRD) revealed high crystallinity and pure copper powder not contain impurity or oxides. Optical

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Karimova, F. B., D. I. Jumaniyazov, and A. V. Tevelev. "Potential ore possibility of rocks of the deposit Kalmakyr of Almalyk district (Middle Tien-Shan)." Moscow University Bulletin. Series 4. Geology, no. 2 (June 7, 2023): 60–65. http://dx.doi.org/10.55959/msu0579-9406-4-2023-63-2-60-65.

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The article presents the mineralogical and geochemical features of the types and grades of ores of the porphyry copper deposit Kalmakyr. The chemical, mass spectrometric results of analyzes of selected samples are given. When describing polished sections, ore minerals and their structural and textural features were established. The polyformation and potential ore content of the rocks of the deep horizons of the Kalmakyr deposit was revealed. It has been determined that the change of copper mineralization with depth to copper-molybdenum is due to the change of diorite by monzonitoids. Gold and

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Kyaw, Zay Ya, Kyaw Kyaw Phyo, A. B. Kopylov, and R. A. Kovalev. "IMPROVEMENT OF REAGENT REGIMES OF FLOTATION OF SPHALERITE AND PYRITE FROM SILVER COPPER-ZINC AND POLYMETALLIC ORE DEPOSITS." News of the Tula state university. Sciences of Earth 4, no. 1 (2021): 374–88. http://dx.doi.org/10.46689/2218-5194-2021-4-1-374-388.

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Pyrite copper-zinc (sulfide) and polymetallic ores in Russia are complex and refracto-ry mineral raw materials. The main processing technology for such ores is flotation. Currently, the improvement of the flotation technology of such mineral raw materials is carried out in several directions. It has been established by the practice of enrichment of copper-zinc ores that obtaining high-quality zinc and pyrite concentrates is impossible without the use of various modifiers in the practice of flotation of sphalerite and pyrite. Such reagents are copper (II), zinc and iron (II) sulfates in an alka

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Kyaw, Z. Y., Z. A. Tiagalieva, Z. O. Htet, and K. K. Phyo. "Improvement of reagent flotation modes of sphalerite and pyrite from deposits of copper-zinc pyrite, polymetallic copper-zinc pyrite and polymetallic ores." IOP Conference Series: Earth and Environmental Science 942, no. 1 (November 1, 2021): 012004. http://dx.doi.org/10.1088/1755-1315/942/1/012004.

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Abstract Copper-zinc pyrite (Sulphide) and polymetallic ores of Russia are complex and difficult to process mineral raw materials. The main technology for the enrichment of this ores are flotation. Currently, the improvement of the flotation technology of this mineral raw materials is carried out in several way. It has been established by the practice of beneficiation of copper-zinc ores that obtaining high-quality zinc and pyrite concentrates is impossible without adding flotation modifiers of sphalerite and pyrite to various flotation operations. This reagent are copper (II) sulfates, zinc a

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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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Sekisov, Artur, and Slava Korolev. "Prospects for using combined (traditional and physical-chemical) mining technologies in the development of large gold-copper ore deposits." E3S Web of Conferences 192 (2020): 02001. http://dx.doi.org/10.1051/e3sconf/202019202001.

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The article deals with the problems of development of large gold-copper ore deposits, which have prospects for the development of mining and processing complexes based on them, which produce refined metals as final products. The article substantiates the feasibility of using combined traditional and physical-chemical geotechnologies in the development of these deposits, including geotechnologies in mining, using innovative processes of activation of heap and underground leaching of copper, fine and dispersed gold from complex ores. At the initial stage of development of the large deposits of c

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