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Influence of Magnetite on Bioleaching of Chalcopyrite by Acidithiobacillus Ferrooxidans
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Sha DENG1, 2, Jiaxin YANG1, 2, Tao LONG1, 2, Wei YANG1, 2
Mining and Metallurgical Engineering | 2023, 43(5) : 98 - 102
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Mining and Metallurgical Engineering | 2023, 43(5): 98-102
• METALLURGY •
Influence of Magnetite on Bioleaching of Chalcopyrite by Acidithiobacillus Ferrooxidans
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Sha DENG1, 2, Jiaxin YANG1, 2, Tao LONG1, 2, Wei YANG1, 2
Affiliations
  • 1.School of Resource Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, China
  • 2.Shaanxi Key Laboratory of Gold and Resources, Xi'an 710055, Shaanxi, China
Published: 2023-10-01 doi: 10.3969/j.issn.0253-6099.2023.05.023
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The influence of magnetite on bioleaching of chalcopyrite by Acidithiobacillus ferrooxidans was systematically explored by electrochemical tests such as open-circuit potential and cyclic voltammetry. Results show that the leaching rate of chalcopyrite can be increased by increasing the addtion of magnetite in the leaching system by undomesticated bacteria. The bacteria after domestication presents enhanced activity. With the addition of magnetite at an amount of 0.5 g, the copper leaching rate can be increased by around 8%. With the addtion of magnetite at an amout over 0.5 g, jarosite is generated during the leaching process, which can worsen the leaching environment, leading to the copper leaching rate just up by about 2%. The open circuit potential of chalcopyrite is always higher than that of magnetite in the system with different concentrations of Fe3+. During the galvanic reaction between chalcopyrite and magnetite, chalcopyrite acts as the cathode, which is not conducive to oxidation and dissolution of chalcopyrite. However, Fe3+in the solution can increase the corrosion rate of chalcopyrite, leading to an increased leaching rate of chalcopyrite.

chalcopyrite  /  magnetite  /  bioleaching  /  bacterial domestication  /  electrochemical test
Sha DENG, Jiaxin YANG, Tao LONG, Wei YANG. Influence of Magnetite on Bioleaching of Chalcopyrite by Acidithiobacillus Ferrooxidans[J]. Mining and Metallurgical Engineering, 2023 , 43 (5) : 98 -102 . DOI: 10.3969/j.issn.0253-6099.2023.05.023
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Year 2023 volume 43 Issue 5
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Article Info
doi: 10.3969/j.issn.0253-6099.2023.05.023
  • Receive Date：2023-05-06
  • Online Date：2026-03-05
  • Published：2023-10-01
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  • Received：2023-05-06
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Affiliations
    1.School of Resource Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, China
    2.Shaanxi Key Laboratory of Gold and Resources, Xi'an 710055, Shaanxi, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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