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Sun D, Li M, Zhang M, Cui R, Yang Z, Yu L, Wang D, Yao W. Utilization and Mechanisms of Tannic Acid as a Depressant for Chalcopyrite and Pyrite Separation. ACS OMEGA 2023; 8:30474-30482. [PMID: 37636951 PMCID: PMC10448649 DOI: 10.1021/acsomega.3c03663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 07/28/2023] [Indexed: 08/29/2023]
Abstract
Current flotation practices using lime or cyanide as depressants in chalcopyrite and pyrite separation have significant disadvantages, such as substantial reagent consumption, high slurry pH, and environmental hazards. This work aimed to explore the utilization and mechanisms of tannic acid (TA) as an eco-friendly alternative to lime or cyanide in chalcopyrite-pyrite separation. Flotation results showed that TA selectively depressed pyrite yet allowed chalcopyrite to float at neutral or alkaline pH. Adsorption density and zeta potential results indicated that TA adsorbed intensely on pyrite but minorly on chalcopyrite. Besides, potassium ethyl xanthate was still largely adsorbed on chalcopyrite but not on pyrite after TA adsorption. Surface analysis by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy further showed that the oxidation species of FeOOH and Fe2 (SO4)3, particularly FeOOH were the main active sites for TA chemical adsorption. Owing to the greater and faster oxidation of pyrite, more FeOOH and Fe2 (SO4)3 were generated on the pyrite surface, and the chemical adsorption of TA was more pronounced on the pyrite surface than on the chalcopyrite surface.
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Affiliation(s)
- Da Sun
- School
of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
- Hubei
Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic
Mineral Resources, Wuhan 430081, People’s
Republic of China
- Wuhan
Kaisheng Technology Co., Ltd., Wuhan 430070, People’s Republic of China
| | - Maolin Li
- School
of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
- Hubei
Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic
Mineral Resources, Wuhan 430081, People’s
Republic of China
- Changsha
Research Institute of Mining and Metallurgy Co., Ltd., Changsha 410012, People’s Republic of China
| | - Ming Zhang
- School
of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
- Hubei
Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic
Mineral Resources, Wuhan 430081, People’s
Republic of China
| | - Rui Cui
- School
of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
- Hubei
Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic
Mineral Resources, Wuhan 430081, People’s
Republic of China
| | - Zhiqiang Yang
- School
of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
| | - Lingfeng Yu
- School
of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
| | - Daowei Wang
- Department
of Chemical and Materials Engineering, University
of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Wei Yao
- School
of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
- Hubei
Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic
Mineral Resources, Wuhan 430081, People’s
Republic of China
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Cui Y, Jiao F, Qin W, Wang C, Li X. Flotation separation of sphalerite from galena using eco-friendly and efficient depressant pullulan. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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