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Synergistic Oxidation of NaClO and KMnO4 on Flotation Separation of Chalcopyrite and Pyrite and Mechanism Therein
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Yiyun LONG, Wanzhong YIN, Kaiyun LONG
Mining and Metallurgical Engineering | 2024, 44(5) : 51 - 56
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Mining and Metallurgical Engineering | 2024, 44(5): 51-56
• MINERAL PROCESSING •
Synergistic Oxidation of NaClO and KMnO4 on Flotation Separation of Chalcopyrite and Pyrite and Mechanism Therein
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Yiyun LONG, Wanzhong YIN, Kaiyun LONG
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  • Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350000, Fujian, China
Published: 2024-10-01 doi: 10.3969/j.issn.0253-6099.2024.05.010
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The effects of separate and combined usage of NaClO and KMnO4 on the flotation separation of chalcopyrite and pyrite were investigated by performing flotation and adsorption tests, infrared spectroscopy (IR) and XPS analysis. The results show that selective separation of chalcopyrite and pyrite can be achieved with NaClO and KMnO4 in a ratio of 10∶1, the total oxidant dosage of 70 mg/L, pulp pH of 10, and oxidation time of 3 min. It is shown that the recovery of chalcopyrite can exceed 92%, while the recovery of pyrite is less than 8%. The IR and XPS analyses show that a combined usage of NaClO and KMnO4 obviously changes the surface property of pyrite, resulting in hydrophilic oxidized substances on the surface, such as iron oxide, iron hydroxide and iron sulfate, which impedes the adsorption of collectors, thus reducing floatability of pyrite. The chalcopyrite surface remains mildly inert to NaClO and KMnO4 under certain conditions. Consequently, the adsorption of xanthate on chalcopyrite is remarkably higher than that on pyrite, which favors their flotation separation.

chalcopyrite  /  pyrite  /  surface oxidation  /  flotation  /  depressant  /  collector  /  oxidant  /  Cu/S separation
Yiyun LONG, Wanzhong YIN, Kaiyun LONG. Synergistic Oxidation of NaClO and KMnO4 on Flotation Separation of Chalcopyrite and Pyrite and Mechanism Therein[J]. Mining and Metallurgical Engineering, 2024 , 44 (5) : 51 -56 . DOI: 10.3969/j.issn.0253-6099.2024.05.010
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doi: 10.3969/j.issn.0253-6099.2024.05.010
  • Receive Date：2024-03-29
  • Online Date：2026-03-17
  • Published：2024-10-01
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  • Received：2024-03-29
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    Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350000, Fujian, 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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