Готові списки джерел за темами / Copper sulfide ore

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Добірка наукової літератури з теми "Copper sulfide ore"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "Copper sulfide ore"

BERNARDEZ, L. A., L. R. P. DE ANDRADE LIMA, and L. E. L. DE OLIVEIRA. "BIOLEACHING OF COPPER FROM CARAIBA MINE ORE (BRAZIL)." Latin American Applied Research - An international journal 49, no. 1 (2019): 25–29. http://dx.doi.org/10.52292/j.laar.2019.281.

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The bioleaching of copper ore from the Caraiba Mine was assessed. A microorganism, Acidiothiobacillus ferrooxidans, was isolated from samples collected directly in acid mining drainage in a gold mine tailings pound and used in the bioleaching of the copper sulfide ore. This ore is composed mainly of 28% of oxidized species, 43% of secondary sulfides and 24% of primary sulfide. The shaking flasks experiments with the Caraiba ore showed copper chemical leaching of about 37% and copper bioleaching of about 60% within 60 days at low temperature and native microorganism.

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Liu, Dian Wen, Jian Jun Fang, Xiao Lin Zhang, et al. "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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Ran, Jin Cheng, Quan Jun Liu, and Zhi Guo Zhang. "Separation Test of Oxide Copper Ore in Yunnan." Applied Mechanics and Materials 470 (December 2013): 80–83. http://dx.doi.org/10.4028/www.scientific.net/amm.470.80.

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A task of a refractory oxide copper ore in Yunnan has been studied, the grade of copper is 2.76% in crude ore. This ore has high oxidation and deep combination, the oxidation ratio is 42.32% and the combination ratio is 33.01%, so it is difficult oxide copper. Because the sulfide copper in crude ore containing 21.27%, so by experimental research, we decided to adopt the process of floating copper sulfides, and then sulfide oxide copper. In the flotation of oxidized copper minerals, we take the process of desliming, the copper minerals have recycled efficiently, while making a small precious me

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Ran, Jin Cheng, Quan Jun Liu, and Zhi Guo Zhang. "Experiment Research of a Certain Cu-Pb-Zn Poly-Metallic Sulfide Ore in Yunnan." Applied Mechanics and Materials 556-562 (May 2014): 197–200. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.197.

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By comparing a variety of programs, for the feature of a certain Cu-Pb-Zn poly-metallic sulfide ore in Yunnan, using the processes of copper and lead priority floating, combined depressants of sodium silicate + sodium sulfite + carboxymethylcellulose in copper flotation, the tailings of bulk flotation for copper and lead after activated flotation of zinc mineral by copper sulfate, the successful implementation of effective separation of copper and lead and gained a better indicator of dressing.

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Bobadilla-Fazzini, Roberto A., Patricia Piña, Veronica Gautier, Karen Brunel, and Pilar Parada. "Microbial & Mineralogical Dynamics during Copper Sulfides Bioleaching, the Search for the Missing Link." Advanced Materials Research 1130 (November 2015): 131–35. http://dx.doi.org/10.4028/www.scientific.net/amr.1130.131.

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Bioleaching involves a chemical-microbial-driven dynamic process of oxidation and dissolution, as well as precipitation and formation of surface secondary phases that change the copper sulfide exposure/occlusion profiles. This dynamic process determines the kinetics of copper sulfides bioleaching. Former studies have shown the microbiological dynamics of the leaching solutions, and most mineralogical studies have been done with pure copper sulfide species under controlled conditions. In this work we aim to unravel the link between the microbiology and the mineralogy during the bioleaching of a

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Ryaboy, V. I., and E. D. Shepeta. "Collector for Copper-Arsenic Ore Flotation." Gornye nauki i tekhnologii = Mining Science and Technology (Russia) 5, no. 4 (2021): 297–306. http://dx.doi.org/10.17073/2500-0632-2020-4-297-306.

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Copper and scheelite concentrates are produced from scheelite-sulfide ores of the Vostok-2 deposit at the Primorsky processing plant. Chalcopyrite, gold, silver, and harmful impurities (arsenopyrite, pyrrhotite) are extracted into the copper concentrate. As a collector, dialkyldithiophosphate-type IMA-I413p reagent is used. Bulk sulfide concentrate is produced using activated carbon and trisodium phosphate; copper cleaner flotation is carried out in the medium of ferrous sulfate. The commercial copper concentrate contains 16 % copper, 33 g/t gold, and 280 g/t silver. The recovery of the metals

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Zepeda, Víctor J., Ivan Nancucheo, Milton Guillen, et al. "Biological Production of Copper Sulfide Concentrate from Flotation Tailings and Low Grade Ore." Solid State Phenomena 262 (August 2017): 202–6. http://dx.doi.org/10.4028/www.scientific.net/ssp.262.202.

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Flotation tailings are hazardous due to physical and chemical instability and are currently considered one of the main pollution concerns of mining industry. Most of these tailings are fine-grained residues with low copper content (0.1-0.8%) and include toxic compounds, such as heavy metals, arsenic, and flotation reagents, among others. Another hazard is the generation of acid mine drainage (AMD) due to biological oxidation of tailings. On the other hand, low-grade ore is challenging the mining industry to commercially produce copper.The main objective of this work was to assess the use of fl

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Fu, Yan Xiong, Bao Liang Ge, Qing Li, and Jing Lu Zhang. "Process Mineralogy Study on a Sandstone Copper Ore." Advanced Materials Research 881-883 (January 2014): 1603–6. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.1603.

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In this thesis the object of study is a low grade sandstone copper with complex composition. Through the process mineralogy research on a sandstone copper ore,the result showed that the primary sulfide copper minerals are tetrahedrite and chalcopyrite; secondary sulfide copper minerals are bornite, chalcocite and azurite; the main oxide copper mineral is malachite; the main gangue mineral is quartz. The grade of copper is 0.77% and the oxidation rate is 45.45% in the run of mine, it is an oxide copper ore with not thoroughly oxidation. There is a part of disseminated particle size of copper mi

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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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Більше джерел

Дисертації з теми "Copper sulfide ore"

Greene, Robert Crandall. "The separation of copper sulfide ore minerals from gangue using magnetic nanoparticles functionalized with peptides selected via phage display : a proof of concept." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61528.

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The full abstract for this thesis is available in the body of the thesis, and will be available when the embargo expires. Applied Science, Faculty of Mining Engineering, Keevil Institute of Graduate

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Tchoumou, Martin. "Hydrometallurgie du cuivre en milieu chlorure : attaques de minerais dosages polarographiques des solutions resultant de l'attaque et depot cathodique du cuivre." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13154.

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Etude dans le cadre de l'extraction de cu des minerais de type chalcopyrite. Lors de l'attaque des minerais de type chalcopyrite par des solutions de cu(ii) en milieu fortement chlorure, les metaux presents dans le minerai sous forme de sulfures passent en solution soit partiellement soit en totalite, et s elementaire precipite. Mise au point du dosage polarographique des ions cu, pb, zn et fe dissous. L'electrolyse de solutions a teneur elevee en cu(i) et contenant pb(ii), zn(ii) ou fe(ii) a mis en evidence un phenomene de codeposition de pb avec cu lorsqu'on opere a des densites de courant e

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Lai, Yueh (Yves). "Thiosulfate leaching of natural Acanthite ore in copper-ammonia-ammonium sulfate medium." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61358.

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Silver is commonly present in acanthite in nature. Reagents like cyanide are used to extract silver from acanthite ores. However, cyanide can potentially damage human health and environment. The use of cyanide is tightly regulated, thus forcing the industry to seek for alternatives. Thiosulfate is currently the most promising alternative. The leaching chemistry of silver with thiosulfate is complex and maybe supplemented with additives such as ammonia, copper and even ethylenediaminetetraacetic acid. The efficiency of silver leaching is improved with the use of these additives. The use of

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PATIL, PANKAJ Y. "MECHANISTIC INVESTIGATION OF RUBBER-BRASS ADHESION: EFFECT OF FORMULATION INGREDIENTS." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1132339683.

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Barra-Pantoja, Luis Fernando. "A Re-Os Study of Sulfides from the Bagdad Porphyry Cu-Mo Deposit, Northern Arizona, USA." Thesis, The University of Arizona, 2001. http://hdl.handle.net/10150/249252.

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Use of Re-Os systematics in sulfides from the Bagdad porphyry Cu-Mo deposit provide information on the timing of mineralization and the source of the ore -forming elements. Analyzed samples of pyrite, chalcopyrite and molybdenite mainly from the quartz monzonite and porphyritic quartz monzonite units are characterized by a moderate to strong potassic alteration (secondary biotite and K- feldspar). Rhenium concentrations in molybdenite are between 330 and 730 ppm. Two molybdenite samples from the quartz monzonite and porphyritic quartz monzonite provide a Re-Os isotope age of 71.7 ± 0.3 Ma. A t

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Creach, Monique. "Accumulation supergène de cuivre en milieu latéritique : étude pétrologique, cristallochimique et géochimique de l'altération du skarn de Santa Blandina (Itapeva, Bresil)." Poitiers, 1988. http://www.theses.fr/1988POIT2344.

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On etudie l'indice cuprifere de santa blandina (bresil) provenant de l'alteration d'un skarn porteur d'une mineralisation sulfuree a chalcopyrite et bornite. Les produits argilomorphes provoquent l'epigenie des mineraux du skarn et des solutions percolantes provoquent l'evolution mineralogique de ces produits. Les analyses mineralogiques et cristallochimiques determinent la nature exacte de ces phases argilomorphes et montrent la difficulte de l'incorporation du cuivre dans un reseau regulier d'argile

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Thorette, Jacques. "Contribution à l'étude de l'hydrothermalisme océanique : exemple du district minéralisé de York-Harbour (massif ophiolitique de Blow-Me-Down, Bay-of-Islands, Terre-Neuve)." Brest, 1986. http://www.theses.fr/1986BRES2002.

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Les mineralisations a cu-fe-zn de york-harbour sont encaissees dans l'unite volcanique situee au sommet de l'ophiolite cambrienne de blow-me-down. Celle-ci s'est formee a l'axe d'une dorsale oceanique a proximite d'une faille transformante. L'organisation en synclinal du secteur mineralise resulte du rejet des failles synvolcaniques en direction nord 135 et nord 45

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Chi-KangWu and 吳季剛. "Syntheses and Characterization of One Dimensional Zinc Sulfide and Copper(I) Sulfide Nanostructures." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/00119395065425145603.

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碩士 國立成功大學 材料科學及工程學系碩博士班 100 We use chemical vapor deposition to grow a variety of ZnS nanostructures. There are four types of nanostructures, including nanowires, nanoarrows, nanobelts and nanosaws. SEM images show that the lower electron beam energy, the clearer surface morphology of the nanostructures. The nanowires are of wurtzite structure. The nanobelts are full of etching signs, and crystallize in wurtzite structure. Through high resolution transmission electron microscopy and dark field imaging under two beam conditions, the bright and dark fringe contrast presence in the TE

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Lo, Michael Joseph. "The Bioleaching of copper sulfide ores in saline media : shake flask studies." Thesis, 1996. http://hdl.handle.net/2429/5998.

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The feasibility of bioleaching two Chilean copper ores under saline conditions was evaluated by batch tests. Total copper content of the ores were 3.87% and 1.64%, respectively. Lower ore mineralogy was comprised of atacamite, chrysocolla, bornite, chalcopyrite, chalcocite, and minor pyrite, while Zaldivar's included brochantite, chrysocolla, chalcocite, and pyrite. Mixed bacterial cultures dominated by Thiobacillus ferrooxidans were used in all test work. As the effect of chloride ion on copper extraction was of primary concern, shake flask tests at various chloride levels were conducte

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Hsu, Chin, and 許靖. "One-step Synthesis of Copper Tin Sulfide Photocathodes for Photoelectrochemical Hydrogen Generation." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/e688a5.

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碩士 國立中山大學 材料與光電科學學系研究所 106 Copper tin sulfide (CTS) is one of promising photocathode materials for photoelectrochemical (PEC) water splitting, because it has a suitable band structure and large absorption coefficient (over 104 cm-1). In this work, CTS was grown onto fluorine doped tin oxide (FTO) glass by a solvothermal method without annealing. According to scanning electron microscope (SEM) and transmission electron microscope (TEM), CTS particle size is around 800 to 1000 nm and consist of nanocrystal and amorphous phase. X-ray photoelectron spectroscopy (XPS) show the elemental

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Книги з теми "Copper sulfide ore"

Mohamed, Sarfraz. Enhanced copper leaching from sulfide ore by Acidithiobacillus ferrooxidans. Laurentian University, 2004.

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A, Di︠u︡zhikov O., та Society of Economic Geologists (U.S.), ред. Geology and metallogeny of sulfide deposits, Norilʹsk Region U.S.S.R. Society of Economic Geologists, 1992.

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Sarkar, S. N. Geology and geochemistry of sulphide ore bodies and associated rocks in Mosaboni and Rakha mines sections in the Singhbhum copper belt. Indian School of Mines, 1986.

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F, Hollister Victor, ed. Porphyry copper, molybdenum , and gold deposits, volcanogenic deposits (massive sulfides), and deposits in layered rock. Society for Mining, Metallurgy, and Exploration, 1991.

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Mielczarski, Jerzy Andrzej. Struktura warstwy adsorpcyjnej tiolowych odczynników flotacyjnych na miedzi i minerałach siarczkowych. Dział Wydawnictw Politechniki Śląskiej, 1987.

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Geology and metallogeny of sulfide deposits Noril'sk Region U.S.S.R. Society of Economic Geologists, 1992.

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Stoffregen, Roger Eben. Genesis of acid-sulfate alteration and Au-Cu-Ag mineralization at Summitville, Colorado: Including sections on supergene alteration and clay mineralogy of the deposit. 1986.

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Частини книг з теми "Copper sulfide ore"

Mathur, Ryan, and Yun Zhao. "Copper Isotopes Used in Mineral Exploration." In Isotopes in Economic Geology, Metallogenesis and Exploration. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-27897-6_14.

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AbstractThe use of copper isotopes related to ore deposit location and genesis has greatly expanded over the past twenty years. The isotope values in ores, rocks, soils, and water range greater than 10‰ and provide ample isotopic variation to identify and interpret complex geological process. From an exploration standpoint, the copper isotope values in waters, sulfides and weathered rocks vector to mineralization at depth. Ground and surface waters display the greatest potential for both green and brownfields exploration, whereas Fe-oxides and other related ore minerals isotope compositions fo

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Distler, V. V., A. D. Genkin, and O. A. Dyuzhikov. "Sulfide Petrology and Genesis of Copper-Nickel Ore Deposits." In Special Publication No. 4 of the Society for Geology Applied to Mineral Deposits. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-70902-9_7.

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Nie, Qi, Ping Lu, Lei Ma, Yong Cheng, Cong Liu, and Yiming Wen. "Research on flotation process of copper-nickel sulfide ore." In Advances in Mineral Resources, Geotechnology and Geological Exploration. CRC Press, 2022. http://dx.doi.org/10.1201/9781003319412-10.

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Li, Guangshi, Hongwei Cheng, Xingli Zou, et al. "Phase Transformation and Element Migration in the Oxidation Process of Nickel-Copper Sulfide Ore." In Characterization of Minerals, Metals, and Materials 2015. John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093404.ch61.

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Li, Guangshi, Hongwei Cheng, Xingli Zou, et al. "Phase Transformation and Element Migration in the Oxidation Process of Nickel-Copper Sulfide Ore." In Characterization of Minerals, Metals, and Materials 2015. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48191-3_61.

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Li, Guangshi, Hongwei Cheng, Cong Xu, et al. "Mineralogical Analysis of Nickel/Copper Polymetallic Sulfide Ore by X-Ray Diffraction Using Rietveld Method." In Characterization of Minerals, Metals, and Materials 2016. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48210-1_8.

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Li, Guangshi, Hongwei Cheng, Cong Xu, et al. "Mineralogical Analysis of Nickel/Copper Polymetallic Sulfide ORE by X-Ray Diffraction Using Rietveld Method." In Characterization of Minerals, Metals, and Materials 2016. John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119263722.ch8.

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Eremin, N. I. "The Hidden Mineralogical and Geochemical Zoning and the Ore-Forming Conditions of Copper and Copper- Lead-Zinc Massive Sulfide Deposits." In Special Publication No. 4 of the Society for Geology Applied to Mineral Deposits. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-70902-9_24.

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Hirota, E., K. Kuchitsu, T. Steimle, J. Vogt, and N. Vogt. "111 CuHS Copper hydrogen sulfide." In Molecules Containing No Carbon Atoms and Molecules Containing One or Two Carbon Atoms. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-540-70614-4_112.

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Duzhikov, O. A. "Copper-Zeolite Ore Formation." In Geology and Metallogeny of Sulfide Deposits Noril’sk Region U.S.S.R. Society of Economic Geologists, 1988. http://dx.doi.org/10.5382/sp.01.03.

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Тези доповідей конференцій з теми "Copper sulfide ore"

Muratkhanov, Daulet, Kanat Bulegenov, and Gulimshat Shakirova1. "ABOUT THE NEW PORPHYRY COPPER MINERALIZATION OBJECT IN THE EASTERN BALKHASH REGION (KAZAKHSTAN)." In 24th SGEM International Multidisciplinary Scientific GeoConference 24. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/1.1/s01.01.

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In Kazakhstan, the main porphyry copper deposits are located in the Northern Balkhash region. The Konyrat, Aktogay, Aidarly, and Borly copper-porphyry deposits have been explored and exploited in this area. The main reserves of the country's copper raw materials are associated with these deposits. The Eastern Balkhash region is part of the North Balkhash ore zone. Previous studies on the Eastern Balkhash region focused on the Aktogay region and did not pay due attention to the southern part of the East Balkhash region, despite the fact that this region borders the Aktogay ore field and has pre

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Boan, B. J. "Corrosion of Aluminum and Copper Waveguide." In CORROSION 1985. NACE International, 1985. https://doi.org/10.5006/c1985-85331.

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Abstract Both aluminum and copper are frequently used to make radio frequency (RF) waveguide because of their high electrical conductivity. Copper is normally the material of choice if conductivity is the critical parameter. Aluminum is selected when weight conservation is also important. One of the features that makes each metal attractive is the fact that both exhibit good corrosion resistance. However, each has a high potential for loss of design performance due to corrosion. Aluminum components are often dip brazed to make waveguide. The presence of moisture and residual dip brazing salts

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Muratkhanov, Daulet, Yerkhozha Mamanov, and Bulegenov Kanat. "ABOUT THE GENETIC TYPES OF COPPER DEPOSITS IN KAZAKHSTAN AND THE PROSPECTS FOR IDENTIFICATION OF NEW ECONOMIC COPPER OBJECTS." In 24th SGEM International Multidisciplinary Scientific GeoConference 24. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/1.1/s01.03.

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Kazakhstan is on leading position in the world in terms of reserves and mining of copper ores. There are 30 deposits with approved reservest. Nowadays, the copper industry of the Rrepublic is provided with a raw material base. Among them, the Zhezkazgan deposit remains unique in terms of reserves and a set of components. The main geological and industrial types of copper deposits (in terms of mining) are deposits of copper sandstones (58%), copper pyrite (17.1%), copper porphyry (8.2%), scarn (4.2%), etc. In the total balance of reserves, ores such as copper sandstones account for 28%, copper

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Howell, Andrew G., and Dennis Kendall. "Sodium Sulfite Decomposition in Boilers and Subsequent Condenser Tube Damage." In CORROSION 1993. NACE International, 1993. https://doi.org/10.5006/c1993-93046.

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Abstract Sodium sulfite is routinely used for removal of traces of oxygen from the water in boilers of low and moderate pressures. Sodium sulfite is unacceptable for use in higher pressure boilers, because it will decompose, releasing acidic gases into the steam, and increasing corrosion of after-boiler components. However, even in boilers of moderate pressure, some degree of decomposition occurs. One of the products of sulfite decomposition, moist sulfur dioxide, can cause stress-corrosion cracking of copper alloys. Monitoring the degree of sulfite decomposition in a specific boiler, and cont

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Carpén, Leena, Elina Huttunen-Saarivirta, Pauliina Rajala, and Malin Bomberg. "Corrosion Behavior of Copper in Simulated Anoxic Groundwater Inoculated with Sulfate Reducing Bacteria and Methanogens." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-09355.

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Abstract In Finland, the high level nuclear waste will be disposed in a geological repository, at the depth of 400-450 m below the sea level. The solid spent fuel rods are placed in cast iron containers, covered with 50 mm thick copper sheet, which are enclosed by a bentonite clay buffer. The surrounding rock provides the final barrier in this multi-barrier concept. Copper has been chosen for the canister material due to its good corrosion resistance in anoxic water. However, colonization and activity of microbes on the surface or in the vicinity of the canister may initiate and accelerate sev

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Agarwal, D. C., M. R. Jasner, and M. B. Rockel. "6% Mo Stainless Steels in Seawater Service." In CORROSION 1992. NACE International, 1992. https://doi.org/10.5006/c1992-92399.

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Abstract The issue of cost effective materials selection for safe and reliable performance is an important one to the marine industry. Numerous laboratory data and field service experience are available to users and designers of marine equipment. This information includes data that covered materials as carbon steel on the low end of marine corrosion resistance, to data on the more resistant copper and copper base alloys, stainless steels, nickel base alloys, and up the ladder to the most resistant material such as titanium and alloys of Ni-Cr-Mo family. This paper presents corrosion data on a

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Muller, C. O. "Multiple Contaminant Gas Effects on Electronic Equipment Corrosion." In CORROSION 1990. NACE International, 1990. https://doi.org/10.5006/c1990-90225.

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Abstract The Instrument Society of America (ISA) Standard S71.04-1985, Environmental Conditions for Process Measurement and Control Systems: Airborne Contaminants, lists gaseous contaminants which may adversely affect electronic/electrical instruments. This standard lists gas concentrations and the corresponding copper reactivity levels. Copper and silver coupons, in environmentally-controlled chambers, were exposed to the four main ISA "Group A" gases; hydrogen sulfide (K2S) , sulfur dioxide (SO2), chlorine (Cl2), and nitrogen dioxide (NO2). Contaminant gas concentrations were at the Class G2

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Liu, Jialin, Wenwen Dou, Ru Jia, et al. "Desulfovibrio Vulgaris Corroded X65 Carbon Steel and Copper with Two Different Types of MIC Mechanisms." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-10586.

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Abstract This study demonstrates that the mechanisms of microbiologically influenced corrosion (MIC) by Desulfovibrio vulgaris, a sulfate reducing bacterium (SRB), against X65 carbon steel and pure copper belong to two different types of MIC. Type I MIC involves extracellular electron transfer across cell walls of sessile cells in biofilms. This type of MIC is also called extracellular electron transfer MIC (EET-MIC). Type II MIC, also known as metabolite MIC (M-MIC), is caused by secreted corrosive metabolites that are more concentrated locally under a biofilm. The corrosive metabolites secre

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Charnkeitkong, Panida, Woranart Jonglertjunya, and Xian She Feng. "Modification of the Chitosan Spray Coating on Pineapple Pulp as Adsorbent for Copper Ion Adsorption from Aqueous Solution." In 2024 8th International Conference on Materials Engineering and Nano Sciences & 2024 8th International Conference on Material Engineering and Manufacturing. Trans Tech Publications Ltd, 2024. http://dx.doi.org/10.4028/p-dg7jhf.

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One of the major toxicants for living things is copper which consists of ions form in most of the manufacturing wastewater treatment. The drain water before releasing it into the water source is desired to eliminate copper ions (Cu2+) by using adsorption. The bio-wastes as adsorbents applied in this work, such as a dried pineapple pulp (DPP), chitosan flake (CTS), and chitosan spray coating on dried pineapple pulp (CPP) have a surface area of about 45.34, 60.02, and 70.01 m2/g, respectively. The effective Cu2+ eliminated efficiency and adsorption capacity from the copper (II) sulfate in aqueou

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de Romero, Matilde F., Oladis T. de Rincón, Zoilabet Duque, Orlando Pérez, and Ismenia Araujo. "Experience with Microbiologically Influenced Corrosion of Copper Alloys in the Waters of Lake Maracaibo." In CORROSION 1997. NACE International, 1997. https://doi.org/10.5006/c1997-97399.

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Abstract The biofouling characteristics of Copper alloys have made them one of the most recommended types for cooling systems using natural estuary waters. However, there have been cases of Microbiologically Influenced Corrosion (MIC) in these alloys, caused by Sulfate Reducing Bacteria (SRB). This article presents the results obtained from an evaluation of MIC carried out on two copper - based alloys: “Al-Brass” ASTM B-111 UNS C68700 and Cu-Ni 90:10 ASTM B-111 UNS C70600 exposed to the waters of Lake Maracaibo. Microorganisms, organic matter and a high oxygen content make these waters highly

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Звіти організацій з теми "Copper sulfide ore"

Maddela, Claypool, and Fang. PR-446-133604-R01 Alternative Method for Potential Measurement on Buried or Submerged Pipeline. Pipeline Research Council International, Inc. (PRCI), 2015. http://dx.doi.org/10.55274/r0010843.

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Missouri S and T investigated alternative new methods to the existing practice of measuring the structure-to-electrolyte potential to assess the level of cathodic protection (CP) of a buried pipeline. The measurement of a negative 850 mV DC pipeline to soil potential relative to a copper/copper sulfate reference electrode has been used for decades as a threshold value for sufficient CP to reduce external corrosion to an acceptable rate ( less than 0.001� per year). However, there is a need for an alternative method that more accurately depicts the corrosion rates of buried pipeline.

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Becerra-Stasiewicz,, Natalie, Veronica Gerios, Christina Mayer, and Sean Morefield. Remote monitoring of cathodic protection systems on navigable waterways. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/49434.

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Cathodic protection is one of the main modes of corrosion prevention for structures in navigable waterways. The rectifier output voltage must be in a specific range to provide effective protection against corrosion. This effort was designed to monitor, predict, and stabilize the efficacy of multiple cathodic protection systems. Copper/copper-sulfate half-cell electrode sensors, water quality sensors, and gauges for rectifier output were connected to modems at multiple locks so the data could be analyzed to create a predictive maintenance algorithm.

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Rupke, Andrew, Stephanie E. Mills, Michael D. Vanden Berg, and Taylor Boden. Utah Mining - 2023 Metals, Industrial Minerals, Uranium, Coal, and Unconventional Fuels. Utah Geological Survey, 2024. http://dx.doi.org/10.34191/c-138.

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2023 Utah Mining Industry Summary The estimated combined value of Utah’s extractive resource production in 2023 totaled approximately $10.1 billion, including production of metals and industrial minerals ($4.0 billion), natural gas and natural gas liquids ($2.1 billion), crude oil ($3.8 billion), and coal ($314 million) (Figure 1). Utah’s diverse mining industry (metals, industrial minerals, and coal) accounted for $4.3 billion (42%) of total extractive resource production, a significant decrease of $531 million from the 2022 revised value (nominal dollars) and lower than peak values reached i

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