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Journal articles on the topic 'Chrysocolla. Copper ores Leaching'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Pérez, Kevin, Norman Toro, Eduardo Campos, et al. "Extraction of Mn from Black Copper Using Iron Oxides from Tailings and Fe2+ as Reducing Agents in Acid Medium." Metals 9, no. 10 (2019): 1112. http://dx.doi.org/10.3390/met9101112.

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Exotic type deposits include several species of minerals, such as atacamite, chrysocolla, copper pitch, and copper wad. Among these, copper pitch and copper wad have considerable concentrations of manganese. However, their non-crystalline and amorphous structure makes it challenging to recover the elements of interest (like Cu or Mn) by conventional hydrometallurgical methods. For this reason, black copper ores are generally not incorporated into the extraction circuits or left unprocessed, whether in stock, leach pads, or waste. Therefore, to dilute MnO2, the use of reducing agents is essenti

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2

Gijsemans, Lukas, Joris Roosen, Sofía Riaño, Peter Tom Jones, and Koen Binnemans. "Ammoniacal Solvoleaching of Copper from High-Grade Chrysocolla." Journal of Sustainable Metallurgy 6, no. 4 (2020): 589–98. http://dx.doi.org/10.1007/s40831-020-00294-3.

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AbstractThe copper silicate ore chrysocolla forms a large potential copper resource, which has not yet been fully exploited, due to difficulties associated with its beneficiation by flotation and metallurgical processing. Direct acid leaching of chrysocolla causes silica gel formation. Therefore, in this work, the feasibility of solvometallurgical methods to leach copper from high-grade chrysocolla while avoiding issues with silica gel formation was assessed. Ammoniacal solvoleaching was performed with a solvent comprising the chelating extractant LIX 984 N or the acidic extractant Versatic ac

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3

Quezada, Víctor, Oscar Benavente, Cristopher Beltrán, Danny Díaz, Evelyn Melo, and Antonio García. "Dissolution of Black Copper Oxides from a Leaching Residue." Metals 10, no. 8 (2020): 1012. http://dx.doi.org/10.3390/met10081012.

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This article presents the behavior of black copper minerals in reducing acid leaching using FeSO4 as reducing agent. The original sample, which was a blend of green and black copper minerals, was treated first by an oxidizing acid leach using O3 to dissolve the soluble phase (green copper oxides). The residue (mainly black copper) was evaluated by agitated leaching under three different solution potentials, with respect to the standard hydrogen electrode (SHE) (450, 500, and 600 mV (SHE)) at 25 °C. The original sample and the leach residue were characterized by scanning electron microscope (SE

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4

Blinov, I. A. "Minerals of oxidation zone of the Elenovskoe copper porphyry deposit, South Urals." МИНЕРАЛОГИЯ (MINERALOGY) 5 (July 16, 2019): 37–48. http://dx.doi.org/10.35597/2313-545x-2019-5-2-37-48.

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Samples of oxidation zone of the Elenovskoe Cu porphyry deposit are studied using optical and scanning electronic microscopy. In addition to Fe hydroxides and abundant malachite, the supergene mineral assemblage includes native Cu and Au, Ag-containing covellite, cuprite, tenorite, plumbogummite, goyazite, iodargyrite, atacamite, and chrysocolla. The oxidized ores contains pyrite relics and high amount of tourmaline (dravite). Some dravite grains contain Cu.

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5

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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6

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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7

Araya, Giselle, Norman Toro, Jonathan Castillo, et al. "Leaching of Oxide Copper Ores by Addition of Weak Acid from Copper Smelters." Metals 10, no. 5 (2020): 627. http://dx.doi.org/10.3390/met10050627.

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In this study, weak acid in the curing and leaching stages of copper ore was incorporated, and we analyzed its effect on the dissolution of copper and final impurities. The weak acid corresponds to a wastewater effluent from sulfuric acid plants produced in the gas treatment of copper smelting processes. This effluent is basically water with high acidity (pH-value low at 1), which contains several toxic elements and some valuable metals. The results indicated that there is no positive or negative effect on the incorporation of the weak acid in the curing stage, while the case of the leaching s

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8

Mubarak, Yousef. "Leaching of Copper Ores: Effects of Operating Variables." International Journal of Emerging Trends in Engineering Research 8, no. 8 (2020): 4226–35. http://dx.doi.org/10.30534/ijeter/2020/31882020.

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9

Boboev, I. R., Sh Bobozoda, and L. S. Strizhko. "Leaching Stubborn Oxidized Gold Ores That Contain Copper." Metallurgist 59, no. 9-10 (2016): 959–63. http://dx.doi.org/10.1007/s11015-016-0200-3.

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10

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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11

Shinkawa, Tatsuya, Tadashi Chida, So Furukawa, and Taro Kamiya. "Bio-Heap Leaching of Primary Copper Sulfide Ore by JOGMEC." Solid State Phenomena 262 (August 2017): 99–102. http://dx.doi.org/10.4028/www.scientific.net/ssp.262.99.

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JOGMEC has been carrying out the study on primary copper sulfide ores leaching for recovering copper economically and efficiently by heap leaching. In our study, we have been using the primary copper sulfide ore produced in an IOCG deposit. The ore is characterized by high iron content and high acid consumption in leaching. For the optimization of the leaching, the conditions such as ore size, agglomeration, pH and irrigation rate of leaching solution were examined with column leach tests. The best result was over 80 % extraction of copper in 150 days with leaching solution of 1 M sulfuric aci

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12

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 (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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13

Masloboev, Vladimir, Sergey Seleznev, Anton Svetlov, and Dmitriy Makarov. "Hydrometallurgical Processing of Low-Grade Sulfide Ore and Mine Waste in the Arctic Regions: Perspectives and Challenges." Minerals 8, no. 10 (2018): 436. http://dx.doi.org/10.3390/min8100436.

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The authors describe the opportunities of low-grade sulfide ores and mine waste processing with heap and bacterial leaching methods. By the example of gold and silver ores, we analyzed specific issues and processing technologies for heap leaching intensification in severe climatic conditions. The paper presents perspectives for heap leaching of sulfide and mixed ores from the Udokan (Russia) and Talvivaara (Finland) deposits, as well as technogenic waste dumps, namely, the Allarechensky Deposit Dumps (Russia). The paper also shows the laboratory results of non-ferrous metals leaching from low-

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14

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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15

Bi, Ke Jun, Jian Jun Fang, Tai Guo Jiang, and Guo Dong Li. "Ammonia Leaching Study on Carbonate Oxidised Copper Ores in Yunnan." Applied Mechanics and Materials 723 (January 2015): 644–47. http://dx.doi.org/10.4028/www.scientific.net/amm.723.644.

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The effects of oxidized copper ores which came from Yunnan province were carried out by using ammonialeaching methods in the laboratory.In order to seek the optimum leaching conditions under normal temperature and pressure,we conducted a series of validation experiments. Theoptimum conditions were obtained as follows: ammonia concentration 2.5mol/L, ammonium sulfateconcentration 2.5mol/L,grinding fineness about 80% -0.074mm, liquid-solid ratio 2.5:1and leaching time was 2.5h. Under these experimental conditions, the copper leaching rate could reach 69.91%.

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16

Feng, Qi Cheng, Shu Ming Wen, Ci Yun Chen, He Fei Zhao, Yi Jie Wang, and Chao Lv. "Extraction of Copper from a Refractory Copper Oxide Ore by Catalytic Oxidation Acid Leaching." Advanced Materials Research 734-737 (August 2013): 941–44. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.941.

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The study aimed to extract copper from copper oxide ores in which copper minerals had a complex association and dissemination with gangue minerals in the form of fine grain by catalytic oxidation acid leaching. Based on the research on the properties of the material and lots of experiments, the leaching process was performed. The optimum parameters of leaching process were determined as sulfuric acid dosage of 150 kg/t, KMnO4 dosage of 1500 g/t, liquid/solid mass ratio of 3 and leaching time of 45 minutes. Under such a condition, the leaching efficiency of 90.15% was achieved, which provided a

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17

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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18

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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19

Langhans, J. W., K. P. V. Lei, and T. G. Carnahan. "Copper-catalyzed thiosulfate leaching of low-grade gold ores." Hydrometallurgy 29, no. 1-3 (1992): 191–203. http://dx.doi.org/10.1016/0304-386x(92)90013-p.

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20

Wawszczak, D., A. Deptuła, W. Łada, et al. "Studies of leaching of copper ores and flotation wastes." Journal of Radioanalytical and Nuclear Chemistry 300, no. 1 (2014): 243–47. http://dx.doi.org/10.1007/s10967-014-3011-7.

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21

Shinkawa, Tatsuya, Taro Kamiya, Kazuhiro Kojima, and Tadashi Chida. "Primary Copper Ore Leaching by Leaching Solution Adjusted Oxidation-Reduction Potential in Column." Advanced Materials Research 1130 (November 2015): 355–58. http://dx.doi.org/10.4028/www.scientific.net/amr.1130.355.

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Copper ore is classified into three groups; primary copper sulfide, copper oxide and secondary copper sulfide. Leaching copper from primary copper sulfide, such as chalcopyrite, with sulfuric acid takes longer time than from copper oxide and secondary copper sulfide. As such, an oxidant is required to extract copper from chalcopyrite. In this study, column leaching tests were carried out using primary copper sulfide ores produced in an iron oxide copper gold (IOCG) deposit and rich in iron in coparison to porphyry copper ores. The columns of 10 cm diameter and 100 cm long had a double tube str

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22

Rasskazova, Anna, and Paul Korpi. "Substantiation of the effective geotechnological parameters of activation heap leaching of gold from refractory ores." E3S Web of Conferences 192 (2020): 02002. http://dx.doi.org/10.1051/e3sconf/202019202002.

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The difficulties associated with the hydrometallurgical processing of refractory ores and some methods of their solution are discussed in the article. Difficulties associated with leaching of goldcopper ores are characterized. Gold and copper content is 0.5 ppm and 0.37 % respectively in the primary ores of the Malmyzh deposit. The ore is characterized as low grade. The geotechnology method of heap leaching is feasible for low grade ores processing. The characteristics of ore material favorable for heap leaching are listed in the paper. The current trends in ore preparation for heap leaching a

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23

Helle, Sonia, and Ursula Kelm. "Experimental leaching of atacamite, chrysocolla and malachite: Relationship between copper retention and cation exchange capacity." Hydrometallurgy 78, no. 3-4 (2005): 180–86. http://dx.doi.org/10.1016/j.hydromet.2005.03.005.

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24

Tomina, V. N., A. A. Khrennikov, A. B. Lebed’, and S. S. Naboichenko. "Heap leaching of copper from the ores of Volkovskoe deposit." Russian Journal of Non-Ferrous Metals 51, no. 4 (2010): 263–67. http://dx.doi.org/10.3103/s1067821210040012.

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25

Molleman, Ellen, and David Dreisinger. "The treatment of copper–gold ores by ammonium thiosulfate leaching." Hydrometallurgy 66, no. 1-3 (2002): 1–21. http://dx.doi.org/10.1016/s0304-386x(02)00080-4.

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26

Ekenes, J. M., and C. A. Caro. "Improving leaching recovery of copper from low-grade chalcopyrite ores." Mining, Metallurgy & Exploration 30, no. 3 (2013): 180–85. http://dx.doi.org/10.1007/bf03402266.

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27

Sekisov, Gennady, Aleksei Sobolev, and Abdakim Ashimbaev. "Features of choosing the schemes for selective mining of ores and justifying their rational parameters while using heap leaching schemes for processing." E3S Web of Conferences 192 (2020): 02010. http://dx.doi.org/10.1051/e3sconf/202019202010.

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The article presents data from theoretical and experimental studies related to the search for a solution to an urgent geotechnological problem - selective mining of standard quality ore, substandard and diluted ores, taking into account the peculiarities of their processing by heap leaching. For complex-structural large-scale ore deposits of the stockwork morphological-structural type, multilevel heterogeneity is typical. The morphology and structure of the objects of direct extraction - ore bodies within the production blocks - vary significantly. The expediency of selective mining and separa

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28

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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29

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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30

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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31

Quezada, Víctor, Antoni Roca, Oscar Benavente, Montserrat Cruells, Evelyn Melo, and María Hernández. "Pretreatment to Leaching for a Primary Copper Sulphide Ore in Chloride Media." Metals 11, no. 8 (2021): 1260. http://dx.doi.org/10.3390/met11081260.

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The dissolution of copper sulphide ores continues to be a challenge for the copper industry. Several media and leaching alternatives have been proposed to improve the dissolution of these minerals, especially for the leaching of chalcopyrite. Among the alternatives, pretreatment prior to leaching was proposed as an option that increases the dissolution of copper from sulphide ores. In this study, a mineral sample from a copper mining company was used. The copper grade of the sample was 0.79%, and its main contributor was chalcopyrite (84%). The effect of curing time (as pretreatment) in a chlo

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32

NAKAZAWA, Hiroshi, Masami KOIZUMI, and Hayato SATO. "Bacterial Leaching of Copper-nickel Sulfide Ores from Jinchuan Mine, China." Shigen-to-Sozai 108, no. 10 (1992): 731–35. http://dx.doi.org/10.2473/shigentosozai.108.731.

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33

Hedjazi, Farhang, and A. John Monhemius. "Industrial application of ammonia-assisted cyanide leaching for copper-gold ores." Minerals Engineering 126 (September 2018): 123–29. http://dx.doi.org/10.1016/j.mineng.2018.07.005.

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34

Conejeros, Víctor, Kevin Pérez, Ricardo I. Jeldres, Jonathan Castillo, Pía Hernández, and Norman Toro. "Novel treatment for mixed copper ores: Leaching ammonia – Precipitation – Flotation (L.A.P.F.)." Minerals Engineering 149 (April 2020): 106242. http://dx.doi.org/10.1016/j.mineng.2020.106242.

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35

Moravvej, Zohre, Ali Mohebbi, and Shahram Daneshpajouh. "The microwave irradiation effect on copper leaching from sulfide/oxide ores." Materials and Manufacturing Processes 33, no. 1 (2016): 1–6. http://dx.doi.org/10.1080/10426914.2016.1244850.

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36

Wang, Wei Zhi, Miao Miao Han, and Chun Guang Yang. "Experimental Research on Cyanidation Leaching of a Gold Ore." Advanced Materials Research 550-553 (July 2012): 2835–39. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.2835.

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The gold ore is oxidized ores, and it is not suitable for flotation separation. The cyanide leaching is used for the recovery of gold. Experimental studies of cyanidation leaching for a oxidized gold ore were carried out. The factors that influence leaching such as grinding size, sodium cyanide quantity, pulp density, extraction time and segmentation leaching were conducted. And experiment pretreatment test with the copper ion which influences leaching. The results demonstrated that the good index of leaching rate 90.11% could be reach.

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Zhang, Qian, Shuming Wen, Qicheng Feng, Song Zhang, and Wenlin Nie. "Multianalysis Characterization of Mineralogical Properties of Copper-Lead-Zinc Mixed Ores and Implications for Comprehensive Recovery." Advances in Materials Science and Engineering 2020 (November 26, 2020): 1–16. http://dx.doi.org/10.1155/2020/2804924.

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Copper-lead-zinc mixed ore in Tibet, China, is a complex and refractory polymetallic ore resource; thus, ascertaining its mineralogical properties is very important for comprehensive recovery of valuable elements. In this work, the mineralogical properties of this copper-lead-zinc mixed ore have been characterized in detail following a multidisciplinary approach, including chemical, phase, x-ray diffraction (XRD), electron microprobe, and mineral liberation analyses. The results show that the raw ore contained 0.53% Cu, 1.29% Pb, and 0.54% Zn; the oxidation rates of copper, lead, and zinc were

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38

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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39

Cariaga, E., F. Concha, and M. Sepúlveda. "Flow through porous media with applications to heap leaching of copper ores." Chemical Engineering Journal 111, no. 2-3 (2005): 151–65. http://dx.doi.org/10.1016/j.cej.2005.02.019.

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40

Carlesi, Carlos, Enrique Cortes, Gianfranco Dibernardi, Jaime Morales, and Edmundo Muñoz. "Ionic liquids as additives for acid leaching of copper from sulfidic ores." Hydrometallurgy 161 (May 2016): 29–33. http://dx.doi.org/10.1016/j.hydromet.2016.01.012.

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41

Sokic, Miroslav, Vladan Milosevic, Velizar Stankovic, Vladislav Matkovic, and Branislav Markovic. "Acid leaching of oxide-sulphide copper ore prior the flotation: A way for an increased metal recovery." Chemical Industry 69, no. 5 (2015): 453–58. http://dx.doi.org/10.2298/hemind140509061s.

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Copper mine "Cerovo"- East Serbia as well as the other ore bodies in its vicinity contain a significant amount of oxide copper minerals in their uper layers (>40%). Processing of such mixed ores by the existing concentration technologies leads to a substantial copper losses (<60%). Reduction of "oxide copper", by acid leaching prior the flotation concentration, can increase the overall copper efficiency up to more than 70% in the single-stage leaching, achieving an efficiency in the flotation concentration stage higher than 75%. Based on the performed experimental results the flow sheet

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Seifelnassr, Ahmed A. S., and Abdel-Zaher M. Abouzeid. "Exploitation of Bacterial Activities in Mineral Industry and Environmental Preservation: An Overview." Journal of Mining 2013 (December 29, 2013): 1–13. http://dx.doi.org/10.1155/2013/507168.

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Since the identification and characterization of iron and sulfur oxidizing bacteria in the 1940s, a rapid progress is being made in minerals engineering based on biological activities. Microorganisms can play a beneficial role in all facets of minerals processing, from mining to waste disposal and management. Some of the applications, such as biologically assisted leaching of copper sulfide ores, uranium ores, and biooxidation of refractory sulfide gold ores, are now established on the scale of commercial processes. A variety of other bioleaching opportunities exist for nickel, cobalt, cadmium

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Ranjbar, M., M. Schaffie, Mohammad Pazouki, et al. "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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Krok, Beate, Axel Schippers, and Wolfgang Sand. "Copper Recovery by Bioleaching of Chalcopyrite: A Microcalorimetric Approach for the Fast Determination of Bioleaching Activity." Advanced Materials Research 825 (October 2013): 322–25. http://dx.doi.org/10.4028/www.scientific.net/amr.825.322.

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Low grade copper ores containing chalcopyrite are increasingly used for copper recovery via biomining. Since metal sulfide oxidation is an exothememic process, bioleaching activity can be measured due to the heat output by microcalorimetry, which is a non-destructive and non-invasive method. The bioleaching activity of pure cultures ofSulfolobus metallicus,Metallosphaera hakonensisand a moderate thermophilic enrichment culture on high grade chalcopyrite was evaluated. Chalcopyrite leaching by microorganisms showed a higher copper recovery than sterile controls. Chemical chalcopyrite leaching b

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Quezada, Víctor, Antoni Roca, Oscar Benavente, Montserrat Cruells, and Evelyn Melo. "The Effects of Sulphuric Acid and Sodium Chloride Agglomeration and Curing on Chalcopyrite Leaching." Metals 11, no. 6 (2021): 873. http://dx.doi.org/10.3390/met11060873.

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An option to improve the leaching efficiency of chalcopyrite is pretreatment prior to leaching. Pretreatment variables, such as the curing time and the addition of chloride, can increase the kinetics of copper extraction, particularly for sulphide ores. However, there has been little research on the topic. The reactions that govern this phenomenon have not been clearly identified. In this study, the effects of sulphuric acid and sodium chloride agglomeration and curing on chalcopyrite leaching were evaluated at various temperatures: 25, 50, 70, and 90 °C. The pretreated ore and leach residues

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Bogdanović, Grozdanka D., Sanja Petrović, Miroslav Sokić, and Milan M. Antonijević. "Chalcopyrite leaching in acid media: a review." Metallurgical and Materials Engineering 26, no. 2 (2020): 177–98. http://dx.doi.org/10.30544/526.

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In the modern practice of copper production, more and more attention is paid to the possibility of treating low-percentage sulfide ores that cannot be treated with conventional procedures (crushing, grinding, flotation). In addition to this, the processes of obtaining copper from complex sulfide concentrates, which cannot undergo pyrometallurgical processing, are increasingly being investigated. Extraction of copper from such raw materials is in most cases achieved by applying leaching procedures. Since chalcopyrite (CuFeS2) is by far the most abundant copper sulfide mineral, a large por

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Ntakamutshi, Patrick Tshibanda, Méschac-Bill Kime, Mutamba Edouard Mwema, Banka Richard Ngenda, and Tshamala Arthur Kaniki. "Agitation and column leaching studies of oxidised copper-cobalt ores under reducing conditions." Minerals Engineering 111 (September 2017): 47–54. http://dx.doi.org/10.1016/j.mineng.2017.06.001.

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Ostrowski, M., and A. Skłodowska. "Bacterial and chemical leaching pattern on copper ores of sandstone and limestone type." World Journal of Microbiology & Biotechnology 9, no. 3 (1993): 328–31. http://dx.doi.org/10.1007/bf00383073.

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Tongamp, William, Yasushi Takasaki, and Atsushi Shibayama. "Arsenic removal from copper ores and concentrates through alkaline leaching in NaHS media." Hydrometallurgy 98, no. 3-4 (2009): 213–18. http://dx.doi.org/10.1016/j.hydromet.2009.04.020.

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Buttinelli, D., R. Lavecchia, F. Pochetti, A. Geveci, N. Guresin, and Y. Topkaya. "Leaching by ferric sulphate of raw and concentrated copper-zinc complex sulphide ores." International Journal of Mineral Processing 36, no. 3-4 (1992): 245–57. http://dx.doi.org/10.1016/0301-7516(92)90047-z.

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