chalcopyrite vs bornite

Early miners extracted ore from underground workings, but most of the ore was mined from several open pits. Chalcopyrite accounts for by far the major part of the Cu in the Sudbury deposits. G. Gu, K. Hu, X. Zhang, X. Xiong, and H. Yang, The stepwise dissolution of chalcopyrite bioleached by Leptospirillum ferriphilum, Electrochim. This sample comes from the Bethlehem copper porphyry deposit in the Central Interior.

4, p. 433. In 2017, the mine produced 75.8 million pounds of copper, 734,000 grams of gold and 8,616,000 grams of silver from 72.6 million tonnes of ore. Store: Pacific Museum of the Earth, University of British Columbia.

11, p. 1119. School of Minerals Processing & Bioengineering, Central South University, Changsha, 410083, China, Hong-bo Zhao, Jun Wang, Xiao-wen Gan, Wen-qing Qin, Ming-hao Hu & Guan-zhou Qiu, Key Lab of Bio-hydrometallurgy of the Ministry of Education, Changsha, 410083, China, You can also search for this author in © 2020 Springer Nature Switzerland AG. This is a preview of subscription content, log in to check access. For a long time it seemed that was the end of mining at Copper Mountain, but production resumed in 2011 and continues to this day. Watling, Control of the redox potential by oxygen limitation improves bacterial leaching of chalcopyrite, Biotechnol. Bioleaching of chalcopyrite and bornite by moderately thermophilic bacteria: an emphasis on their interactions. R.G.

Bornite commonly occurs with other copper sulphide minerals such as chalcocite and weathers, or “oxidizes”, to malachite. 1-2, p. 13. Process., 88(2008), No. 1-4, p. 243. Chalco comes from the Greek word chalko, meaning copper. Bornite dissolved preferentially because of its lower corrosion potential, and its dissolution was accelerated by the galvanic current during the initial stage of bioleaching. It is also known as peacock ore because of its iridescent purple-blue-green tarnish. I think you need an expert on chalcopyrite. Learn more about Institutional subscriptions.

Dutrizac, The kinetics of dissolution of chalcopyrite in ferric ion media, Metall.

Fresh bornite, however, is copper red. M. Gericke, Y. Govender, and A. Pinches, Tank bioleaching of low-grade chalcopyrite concentrates using redox control, Hydrometallurgy, 104(2010), No. Chem. The present study shows that this phenomenon occurs only when cupric and ferrous ions coexist, based on electrochemical measurements.Using a chalcopyrite electrode prepared from an ore lump sample, effects of the addition of 0.1 kmol m−3 cupric and ferrous ions on anodic polarization curves and AC impedance spectra were investigated in 0.1 kmol m−3 sulfuric acid with stirring at 298 K in nitrogen.

This specimen contains primarily bornite and chalcopyrite with apatite.

B, 31(1975), No. Dixon, Competitive bioleaching of pyrite and chalcopyrite, Hydrometallurgy, 83(2006), No.

Copper extraction during the oxidative leaching of chalcopyrite (CuFeS2) by ferric ions or by dissolved oxygen in sulfuric acid solutions is known to be faster at low redox potentials but slower at potentials above a critical value.

Process., 62(2001), No. Mining started up again in the mid 1960s and continued until 1996, when low prices closed the mine again. Technol., 129(2013), p. 200. N. Hiroyoshi, S. Kuroiwa, H. Miki, M. Tsunekawa, and T. Hirajima, Synergistic effect of cupric and ferrous ions on active-passive behavior in anodic dissolution of chalcopyrite in sulfuric acid solutions, Hydrometallurgy, 74(2004), No. Evidence of a high silver penetration through chalcopyrite cracks at 35°C compared to a silver deposition only on the surface at 68°C was obtained. This scattered behaviour of the silver-catalysed chalcopyrite bioleaching at 35° and 68°C leads to several questions, such us: is there a different mechanism of the silver attack at each temperature?, is there any problem associated with the toxic effect of the catalytic ion on the thermophilic microorganisms?

Technol., 99(2008), No. J. Blázquez, F. González, and A. Ballester, Leaching of chalcopyrite with ferric ion.

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