Selective Separation of Chalcopyrite from Galena Using a Green Reagent Scheme
The study of the depression effect of non-toxic depressants on the flotation separation of chalcopyrite from galena is of great importance for both industrial applications and theoretical research. The mixed depressant (D<sub>Final</sub>) of four common inhibitors—sodium carboxymethyl ce...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/11/8/796 |
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| author | Kaile Zhao Chao Ma Guohua Gu Zhiyong Gao |
| author_facet | Kaile Zhao Chao Ma Guohua Gu Zhiyong Gao |
| author_sort | Kaile Zhao |
| collection | DOAJ |
| description | The study of the depression effect of non-toxic depressants on the flotation separation of chalcopyrite from galena is of great importance for both industrial applications and theoretical research. The mixed depressant (D<sub>Final</sub>) of four common inhibitors—sodium carboxymethyl cellulose, sodium silicate, sodium sulfite, and zinc sulfate—exhibited high selectivity during the separation of chalcopyrite from galena. Flotation tests on an industrial copper–lead bulk concentrate showed that using this depressant mixture can achieve highly efficient separation of chalcopyrite from galena at the natural pH of the pulp. Copper and lead concentrates were produced at grades of 21.88% (Cu) and 75.53% (Pb), with recoveries of 89.07% (Cu) and 98.26% (Pb). This showed a similar performance of D<sub>Final</sub> with dichromate, which is a depressant that is widely used in industry, but without the environmental risks or the need for pH control. Zeta potential and Fourier transform infrared (FT-IR) results showed that interaction between the surface of the chalcopyrite and the mixed depressant was prevented by pre-treatment with a composite thiophosphate collector (CSU11), while the mixed depressant could expel/replace the composite thiophosphate on the surface of galena by chemical adsorption, depressing its flotation. This is the reason why this non-toxic depressant achieved the selective depression of galena from chalcopyrite, leading to efficient flotation separation. |
| first_indexed | 2024-03-10T08:34:08Z |
| format | Article |
| id | doaj.art-60e7e5c482f84e60948cc6f712d6fa2a |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T08:34:08Z |
| publishDate | 2021-07-01 |
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| series | Minerals |
| spelling | doaj.art-60e7e5c482f84e60948cc6f712d6fa2a2023-11-22T08:49:03ZengMDPI AGMinerals2075-163X2021-07-0111879610.3390/min11080796Selective Separation of Chalcopyrite from Galena Using a Green Reagent SchemeKaile Zhao0Chao Ma1Guohua Gu2Zhiyong Gao3School of Minerals Processing and Bio-Engineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bio-Engineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bio-Engineering, Central South University, Changsha 410083, ChinaSchool of Minerals Processing and Bio-Engineering, Central South University, Changsha 410083, ChinaThe study of the depression effect of non-toxic depressants on the flotation separation of chalcopyrite from galena is of great importance for both industrial applications and theoretical research. The mixed depressant (D<sub>Final</sub>) of four common inhibitors—sodium carboxymethyl cellulose, sodium silicate, sodium sulfite, and zinc sulfate—exhibited high selectivity during the separation of chalcopyrite from galena. Flotation tests on an industrial copper–lead bulk concentrate showed that using this depressant mixture can achieve highly efficient separation of chalcopyrite from galena at the natural pH of the pulp. Copper and lead concentrates were produced at grades of 21.88% (Cu) and 75.53% (Pb), with recoveries of 89.07% (Cu) and 98.26% (Pb). This showed a similar performance of D<sub>Final</sub> with dichromate, which is a depressant that is widely used in industry, but without the environmental risks or the need for pH control. Zeta potential and Fourier transform infrared (FT-IR) results showed that interaction between the surface of the chalcopyrite and the mixed depressant was prevented by pre-treatment with a composite thiophosphate collector (CSU11), while the mixed depressant could expel/replace the composite thiophosphate on the surface of galena by chemical adsorption, depressing its flotation. This is the reason why this non-toxic depressant achieved the selective depression of galena from chalcopyrite, leading to efficient flotation separation.https://www.mdpi.com/2075-163X/11/8/796chalcopyritegalenanon-toxic depressantsselective separation |
| spellingShingle | Kaile Zhao Chao Ma Guohua Gu Zhiyong Gao Selective Separation of Chalcopyrite from Galena Using a Green Reagent Scheme Minerals chalcopyrite galena non-toxic depressants selective separation |
| title | Selective Separation of Chalcopyrite from Galena Using a Green Reagent Scheme |
| title_full | Selective Separation of Chalcopyrite from Galena Using a Green Reagent Scheme |
| title_fullStr | Selective Separation of Chalcopyrite from Galena Using a Green Reagent Scheme |
| title_full_unstemmed | Selective Separation of Chalcopyrite from Galena Using a Green Reagent Scheme |
| title_short | Selective Separation of Chalcopyrite from Galena Using a Green Reagent Scheme |
| title_sort | selective separation of chalcopyrite from galena using a green reagent scheme |
| topic | chalcopyrite galena non-toxic depressants selective separation |
| url | https://www.mdpi.com/2075-163X/11/8/796 |
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