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J. Cent. South Univ. (2021) 28: 2037-2051 DOI: https://doi.org/10.1007/s11771-021-4751-5 Bioleaching and dissolution kinetics of pyrite, chalcocite and covellite SHANG He(尚鹤)1, 2, 3, 4, GAO Wen... South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021 Abstract: In this work, the bioleaching process of pyrite, chalcocite and covellite which were the main phase......
J. Cent. South Univ. Technol. (2009) 16: 0218-0222 DOI: 10.1007/s11771-009-0037-z Bioleaching of chalcocite by mixed microorganisms subjected to mutation KANG Jian(康 健)1, 2, QIU Guan-zhou(邱冠周)1...; Abstract: Mixed microorganisms with elevated activity of chalcocite-leaching were screened by mutation......
Comparison on the leaching kinetics of chalcocite and pyrite with or without bacteriaRUAN Renmana,b,ZHOU Ec,LIU Xingyub,d,WU Biaod,ZHOU Guiyingd,and WEN Jiankangd a School of Minerals Processing... leaching,and bioleaching of chalcocite and pyrite minerals were conducted in two sets of 3L stirred reactors.The dissolution rates of copper and iron were correlated with leaching conditions.In the acid......
Control of redox potential by oxygen limitation in selective bioleaching of chalcocite and pyriteBiao Wu,Jian-Kang Wen,Bo-Wei Chen,Guo-Cheng Yao,Dian-Zuo WangNational Engineering Laboratory..., the dissolution rates of chalcocite and pyrite are controlled by redox potentials. Experiment on the bioleaching of chalcocite and pyrite under constant redox potential by sparging with nitrogen gas......
Effect of CO2 and N2 on microbial community changes during column bioleaching of low-grade high pyrite-bearing chalcocite oreCHEN Bo-wei(陈勃伟), WU Biao(武彪), LIU Xing-yu(刘兴宇), WEN Jian-kang(温建康) (National Engineering Laboratory of Biohydrometallurgy, General Research Institute for Nonferrous Metals,Beijing 100088, China)Abstract:Simulated heap bioleaching of low-grade high pyrite-bearing chalcocite......
in chalcopyrite lattice was replaced by Cu2+; therefore, the chalcopyrite transformed into covellite. Furthermore, the formation of chalcocite occurred when Fe2+ and Fe3+ were added to the solution containing Cu2+. The copper extraction increased with a decrease of the initial redox potential (or the ratio of Fe3+/Fe2+). Key words: chalcopyrite; covellite; chalcocite; leaching; redox potential Cite......
recovery because of a synergistic effect between PAX and Na2S. Key words: pyrite; chalcocite; flotation; cyanide; depression; sodium sulfide 1 Introduction Gold generally exists in most copper-gold ores... to a saleable copper-gold concentrate with pyrite to be depressed, and then the depressed pyrite is activated and floated to recover the associated gold [1,2]. Chalcopyrite and chalcocite widely exist as primary......
was added, pyrite started to become active and an oxidation peak appeared; the oxidation peaks of arsenopyrite and chalcocite appeared earlier than that of Au. The chalcocite peak shifted in the positive... associated with chalcocite and stibnite. At p H 12, the Au anode dissolution peak current increased with stabilizer concentration. At 0.38 and 0.42 V and for Na2SiO3 concentration below 0.09 M, the current......
the effects of oxygen and other factors. H2O molecule prefers to stay with pyrite and sphalerite surfaces rather than water, whereas for galena, chalcocite, stibnite, and molybdenite, H2O molecule..., chalcocite, and molybdenite are hydrophobic, while sphalerite is hydrophilic. Although pyrite has certain hydrophilicity, it tends to be aerophilic because the reaction of pyrite with H2O is weaker......
predominantly of fayalite and magnetite, together with some glass, chalcocite, and metallic copper. Copper is entrapped in the slag mostly as chalcocite and metallic copper, as well as trace copper......
