| Project/Area Number |
22K14636
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 31020:Earth resource engineering, Energy sciences-related
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2022-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | Flotation / Enargite / Chalcocite / Copper arsenic / Oxidation treatment / Hydrogen peroxide / enargite / chalcocite / hydrogen peroxide / potassium amyl xanthate / selective flotation / mineral separation / Secondary copper sulfide / Arsenic bearing minerals / Selective flotation / Surface properties |
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| Outline of Research at the Start |
Selective oxidation treatment is proposed for the separation of secondary copper sulfides (i.e., chalcocite and covellite) and arsenic-bearing copper minerals (i.e., enargite and tennantite) using flotation in this study. The underlying surface mechanism is studied to explain the flotation behavior.
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| Outline of Final Research Achievements |
This study successfully demonstrated the process of separating copper from minerals containing arsenic via flotation and oxidation treatment using hydrogen peroxide. The research included the basic investigation and practical implementation of the oxidation treatment on copper-arsenic concentrate, ranging from small-scale laboratory experiments to larger-scale bench experiments. This research demonstrated the ability to decrease the arsenic level in the final copper concentrate to a value lower than the threshold for processing copper concentrate with arsenic, which is set at 0.2%. Moreover, this research proposes a method for generating a purified copper concentrate from copper concentrate that contains arsenic.
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| Academic Significance and Societal Importance of the Research Achievements |
This research developed a process to separate arsenic from copper concentrate using flotation and oxidation treatment, producing a clean copper concentrate that contains a minimal amount of arsenic. This will decrease arsenic emissions and minimize the pollution of the environment with arsenic.
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