Investigations on the utilization of konjac glucomannan in the flotation separation of chalcopyrite from pyrite
•Good floatability of chalcopyrite and pyrite were achieved using PBX.•Chalcopyrite and pyrite can be selectively separated with konjac glucomannan.•Konjac glucomannan absorbed more on pyrite surface.•Adsorption of konjac glucomannan on pyrite is physical. To selectively separate chalcopyrite from p...
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| Published in | Minerals engineering Vol. 145; p. 106098 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier Ltd
01.01.2020
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0892-6875 1872-9444 |
| DOI | 10.1016/j.mineng.2019.106098 |
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| Abstract | •Good floatability of chalcopyrite and pyrite were achieved using PBX.•Chalcopyrite and pyrite can be selectively separated with konjac glucomannan.•Konjac glucomannan absorbed more on pyrite surface.•Adsorption of konjac glucomannan on pyrite is physical.
To selectively separate chalcopyrite from pyrite, the effect of konjac glucomannan on the flotation separation of chalcopyrite from pyrite was investigated in this study. The results of single mineral flotation tests showed that konjac glucomannan had a stronger depression effect on pyrite than traditional organic depressants (Starch, Dextrin, Guar gum) with the pyrite recovery less than 5% at the pH range of 5–11, while it had little influence on chalcopyrite flotation over the whole pH range. Flotation tests of mixed minerals were conducted to further study the selective depression effect of konjac glucomannan, and a copper concentrate with CuFeS2 grade of 83.69% and Cu recovery of 85.64% could be obtained from a feed containing 47.20% CuFeS2. This was due to the greater adsorption of konjac glucomannan on the surface of pyrite than that on chalcopyrite surface, which was also proved by the results of zeta potential measurements, adsorption measurements, and FTIR studies. Furthermore, XPS test results manifest that konjac glucomannan adsorbed on pyrite was via physical adsorption. Hydrogen bonding and Bronsted acid-base interaction were considered as the main driving forces. |
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| AbstractList | •Good floatability of chalcopyrite and pyrite were achieved using PBX.•Chalcopyrite and pyrite can be selectively separated with konjac glucomannan.•Konjac glucomannan absorbed more on pyrite surface.•Adsorption of konjac glucomannan on pyrite is physical.
To selectively separate chalcopyrite from pyrite, the effect of konjac glucomannan on the flotation separation of chalcopyrite from pyrite was investigated in this study. The results of single mineral flotation tests showed that konjac glucomannan had a stronger depression effect on pyrite than traditional organic depressants (Starch, Dextrin, Guar gum) with the pyrite recovery less than 5% at the pH range of 5–11, while it had little influence on chalcopyrite flotation over the whole pH range. Flotation tests of mixed minerals were conducted to further study the selective depression effect of konjac glucomannan, and a copper concentrate with CuFeS2 grade of 83.69% and Cu recovery of 85.64% could be obtained from a feed containing 47.20% CuFeS2. This was due to the greater adsorption of konjac glucomannan on the surface of pyrite than that on chalcopyrite surface, which was also proved by the results of zeta potential measurements, adsorption measurements, and FTIR studies. Furthermore, XPS test results manifest that konjac glucomannan adsorbed on pyrite was via physical adsorption. Hydrogen bonding and Bronsted acid-base interaction were considered as the main driving forces. |
| ArticleNumber | 106098 |
| Author | Zhang, Guofan Chen, Yanfei Huang, Ganghong Liu, Dezhi Gao, Yawen |
| Author_xml | – sequence: 1 givenname: Dezhi surname: Liu fullname: Liu, Dezhi organization: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China – sequence: 2 givenname: Guofan surname: Zhang fullname: Zhang, Guofan email: 155611069@csu.edu.cn organization: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China – sequence: 3 givenname: Yanfei surname: Chen fullname: Chen, Yanfei organization: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China – sequence: 4 givenname: Ganghong surname: Huang fullname: Huang, Ganghong organization: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China – sequence: 5 givenname: Yawen surname: Gao fullname: Gao, Yawen organization: Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada |
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| Keywords | Konjac glucomannan Chalcopyrite Pyrite Hydrogen bonding Flotation separation |
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| Snippet | •Good floatability of chalcopyrite and pyrite were achieved using PBX.•Chalcopyrite and pyrite can be selectively separated with konjac glucomannan.•Konjac... |
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| SubjectTerms | Chalcopyrite Flotation separation Hydrogen bonding Konjac glucomannan Pyrite |
| Title | Investigations on the utilization of konjac glucomannan in the flotation separation of chalcopyrite from pyrite |
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