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Exploration of a novel depressant polyepoxysuccinic acid for the flotation separation of pentlandite from lizardite slimes
https://orcid.org/0000-0002-0481-9721
Abstract Lizardite is representative of a group of serpentine minerals that coexists with nickel sulfide minerals, and the lizardite slime coating that easily forms on surfaces during mineral processing, making it difficult for beneficiation. In this study, a biodegradable polyepoxysuccinic acid (PESA) was introduced as a novel depressant to eliminate the adverse effects of lizardite slimes on pentlandite flotation. The results of microflotation tests and adsorption measurements showed that PESA addition considerably increased the separation efficiency of pentlandite from lizardite slimes, which could be attributed to the improvement of collector adsorption density on the pentlandite surface. Zeta potential measurements and DLVO calculations showed that the lizardite surface charge changed from positive to negative in the presence of PESA, and the resulting electrostatic repulsion caused hetero-dispersion between pentlandite and lizardite particles. Consequently, a collector could adsorb onto the exposed pentlandite surface, restoring the floatability of pentlandite. X-ray photoelectron spectroscopy (XPS) analysis was used to characterize the chemical interactions between PESA and the Mg sites on the lizardite surface. These results demonstrate that PESA can be used as an effective depressant for removing lizardite slimes from the pentlandite surface in a flotation system.
Graphical abstract Display Omitted
Highlights PESA was firstly utilized as a depressant for lizardite in the sulfide mineral flotation The adverse effect of lizardite slime on pentlandite flotation can be eliminated by PESA. The addition of PESA resulted in the repulsion between pentlandite with lizardite slime. PESA interacted with Mg site at the lizardite surface by chemical adsorption.
Exploration of a novel depressant polyepoxysuccinic acid for the flotation separation of pentlandite from lizardite slimes
https://orcid.org/0000-0002-0481-9721
Abstract Lizardite is representative of a group of serpentine minerals that coexists with nickel sulfide minerals, and the lizardite slime coating that easily forms on surfaces during mineral processing, making it difficult for beneficiation. In this study, a biodegradable polyepoxysuccinic acid (PESA) was introduced as a novel depressant to eliminate the adverse effects of lizardite slimes on pentlandite flotation. The results of microflotation tests and adsorption measurements showed that PESA addition considerably increased the separation efficiency of pentlandite from lizardite slimes, which could be attributed to the improvement of collector adsorption density on the pentlandite surface. Zeta potential measurements and DLVO calculations showed that the lizardite surface charge changed from positive to negative in the presence of PESA, and the resulting electrostatic repulsion caused hetero-dispersion between pentlandite and lizardite particles. Consequently, a collector could adsorb onto the exposed pentlandite surface, restoring the floatability of pentlandite. X-ray photoelectron spectroscopy (XPS) analysis was used to characterize the chemical interactions between PESA and the Mg sites on the lizardite surface. These results demonstrate that PESA can be used as an effective depressant for removing lizardite slimes from the pentlandite surface in a flotation system.
Graphical abstract Display Omitted
Highlights PESA was firstly utilized as a depressant for lizardite in the sulfide mineral flotation The adverse effect of lizardite slime on pentlandite flotation can be eliminated by PESA. The addition of PESA resulted in the repulsion between pentlandite with lizardite slime. PESA interacted with Mg site at the lizardite surface by chemical adsorption.
Exploration of a novel depressant polyepoxysuccinic acid for the flotation separation of pentlandite from lizardite slimes
https://orcid.org/0000-0002-0481-9721
Abstract Lizardite is representative of a group of serpentine minerals that coexists with nickel sulfide minerals, and the lizardite slime coating that easily forms on surfaces during mineral processing, making it difficult for beneficiation. In this study, a biodegradable polyepoxysuccinic acid (PESA) was introduced as a novel depressant to eliminate the adverse effects of lizardite slimes on pentlandite flotation. The results of microflotation tests and adsorption measurements showed that PESA addition considerably increased the separation efficiency of pentlandite from lizardite slimes, which could be attributed to the improvement of collector adsorption density on the pentlandite surface. Zeta potential measurements and DLVO calculations showed that the lizardite surface charge changed from positive to negative in the presence of PESA, and the resulting electrostatic repulsion caused hetero-dispersion between pentlandite and lizardite particles. Consequently, a collector could adsorb onto the exposed pentlandite surface, restoring the floatability of pentlandite. X-ray photoelectron spectroscopy (XPS) analysis was used to characterize the chemical interactions between PESA and the Mg sites on the lizardite surface. These results demonstrate that PESA can be used as an effective depressant for removing lizardite slimes from the pentlandite surface in a flotation system.
Graphical abstract Display Omitted
Highlights PESA was firstly utilized as a depressant for lizardite in the sulfide mineral flotation The adverse effect of lizardite slime on pentlandite flotation can be eliminated by PESA. The addition of PESA resulted in the repulsion between pentlandite with lizardite slime. PESA interacted with Mg site at the lizardite surface by chemical adsorption.
Exploration of a novel depressant polyepoxysuccinic acid for the flotation separation of pentlandite from lizardite slimes
Liu, Cheng (author) / Zheng, Yunfei (author) / Yang, Siyuan (author) / Fu, Weng (author) / Chen, Xin (author)
Applied Clay Science ; 202
2020-11-26
Article (Journal)
Electronic Resource
English
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