Development of separation method for secondary copper and arsenic minerals using flotation
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 |
Review Section |
Basic Section 31020:Earth resource engineering, Energy sciences-related
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Research Institution | Kyushu University |
Principal Investigator |
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Project Period (FY) |
2022-04-01 – 2024-03-31
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Project Status |
Granted (Fiscal Year 2022)
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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 | enargite / chalcocite / hydrogen peroxide / potassium amyl xanthate / selective flotation / mineral separation / Secondary copper sulfide / Arsenic bearing minerals / Oxidation treatment / Selective flotation / Surface properties |
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 Annual Research Achievements |
The separation of chalcocite (a secondary copper mineral) and enargite (a copper arsenic mineral) was studied using hydrogen peroxide (H2O2) oxidation treatment and flotation process. Flotation tests of pure and mixed minerals indicated that H2O2 treatment reduced the floatability of chalcocite and enargite by forming sulfate and copper hydroxide on their surfaces. Despite the detrimental effect of the H2O2 treatment, there was a narrow window of H2O2 concentration for separating both minerals, in which enargite floated and chalcocite was depressed. This selective flotation behavior was caused by the rapid adsorption of potassium amyl xanthate (KAX) and lower surface oxidation of enargite compared with that of chalcocite.
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Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The research was going smoothly, as planned. Although it is initially difficult to separate both chalcocite and enargite owing to their similarity and interactions, we optimize the separation process using various hydrogen peroxide concentrations. Unfortunately, we have yet to apply this process to covellite and tennantite, owing to difficulties obtaining high-quality covellite and tennantite.
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Strategy for Future Research Activity |
We planned to obtain a high-quality covellite and tenanntite and then applied the similar oxidation treatment to evaluate the selective separation possibility. In addition, we are going to investigate other treatments for selective separation of chalcocite and enargite using flotation. Furthermore, we will try to apply this oxidation treatment with complex copper ores.
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Report
(1 results)
Research Products
(14 results)