Oxidative Depression of Arsenopyrite by Using Calcium Hypochlorite and Sodium Humate
During smelting, arsenic in copper concentrates affects the product quality and causes environmental pollution. Removing arsenic minerals from copper concentrates requires environmental-friendly and cost-effective depressants for flotation separation. Ca(ClO)2 was combined with sodium humate (SH) to...
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| Format: | Article |
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MDPI AG
2018-10-01
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| Series: | Minerals |
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| Online Access: | http://www.mdpi.com/2075-163X/8/10/463 |
| _version_ | 1811269413182111744 |
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| author | Shangyong Lin Runqing Liu Yongjie Bu Chen Wang Li Wang Wei Sun Yuehua Hu |
| author_facet | Shangyong Lin Runqing Liu Yongjie Bu Chen Wang Li Wang Wei Sun Yuehua Hu |
| author_sort | Shangyong Lin |
| collection | DOAJ |
| description | During smelting, arsenic in copper concentrates affects the product quality and causes environmental pollution. Removing arsenic minerals from copper concentrates requires environmental-friendly and cost-effective depressants for flotation separation. Ca(ClO)2 was combined with sodium humate (SH) to improve the flotation separation of chalcopyrite from arsenopyrite. Results of single-mineral flotation indicated that combined Ca(ClO)2 and SH significantly inhibited arsenopyrite and exerted a negligible effect on chalcopyrite. The arsenic content in copper concentrates significantly decreased from 63% to 11% in the absence of a depressant and in the presence of Ca(ClO)2 and SH, as proven by the mixed-mineral flotation results. SH can adsorb on both mineral surfaces as indicated by the zeta potential measurements and Fourier transform infrared spectroscopy. However, the presence of Ca(ClO)2 increased the adsorption of arsenopyrite compared with chalcopyrite. The arsenopyrite floatability depressed with the Ca(ClO)2 oxidation and subsequent SH adsorption, as verified by X-ray photoelectron spectroscopy. Results of flotation tests confirmed that the chalcopyrite surface was slightly oxidized, but it remained hydrophobic. The combination of depressants has the potential for industrial application. |
| first_indexed | 2024-04-12T21:41:37Z |
| format | Article |
| id | doaj.art-de288a2c5d074eea890909d59207f4a9 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-04-12T21:41:37Z |
| publishDate | 2018-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-de288a2c5d074eea890909d59207f4a92022-12-22T03:15:46ZengMDPI AGMinerals2075-163X2018-10-0181046310.3390/min8100463min8100463Oxidative Depression of Arsenopyrite by Using Calcium Hypochlorite and Sodium HumateShangyong Lin0Runqing Liu1Yongjie Bu2Chen Wang3Li Wang4Wei Sun5Yuehua Hu6School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Mineral Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Mineral Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Mineral Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Mineral Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Mineral Processing and Bioengineering, Central South University, Changsha 410083, ChinaSchool of Mineral Processing and Bioengineering, Central South University, Changsha 410083, ChinaDuring smelting, arsenic in copper concentrates affects the product quality and causes environmental pollution. Removing arsenic minerals from copper concentrates requires environmental-friendly and cost-effective depressants for flotation separation. Ca(ClO)2 was combined with sodium humate (SH) to improve the flotation separation of chalcopyrite from arsenopyrite. Results of single-mineral flotation indicated that combined Ca(ClO)2 and SH significantly inhibited arsenopyrite and exerted a negligible effect on chalcopyrite. The arsenic content in copper concentrates significantly decreased from 63% to 11% in the absence of a depressant and in the presence of Ca(ClO)2 and SH, as proven by the mixed-mineral flotation results. SH can adsorb on both mineral surfaces as indicated by the zeta potential measurements and Fourier transform infrared spectroscopy. However, the presence of Ca(ClO)2 increased the adsorption of arsenopyrite compared with chalcopyrite. The arsenopyrite floatability depressed with the Ca(ClO)2 oxidation and subsequent SH adsorption, as verified by X-ray photoelectron spectroscopy. Results of flotation tests confirmed that the chalcopyrite surface was slightly oxidized, but it remained hydrophobic. The combination of depressants has the potential for industrial application.http://www.mdpi.com/2075-163X/8/10/463chalcopyritearsenopyritecalcium hypochloriteoxidationsodium humate |
| spellingShingle | Shangyong Lin Runqing Liu Yongjie Bu Chen Wang Li Wang Wei Sun Yuehua Hu Oxidative Depression of Arsenopyrite by Using Calcium Hypochlorite and Sodium Humate Minerals chalcopyrite arsenopyrite calcium hypochlorite oxidation sodium humate |
| title | Oxidative Depression of Arsenopyrite by Using Calcium Hypochlorite and Sodium Humate |
| title_full | Oxidative Depression of Arsenopyrite by Using Calcium Hypochlorite and Sodium Humate |
| title_fullStr | Oxidative Depression of Arsenopyrite by Using Calcium Hypochlorite and Sodium Humate |
| title_full_unstemmed | Oxidative Depression of Arsenopyrite by Using Calcium Hypochlorite and Sodium Humate |
| title_short | Oxidative Depression of Arsenopyrite by Using Calcium Hypochlorite and Sodium Humate |
| title_sort | oxidative depression of arsenopyrite by using calcium hypochlorite and sodium humate |
| topic | chalcopyrite arsenopyrite calcium hypochlorite oxidation sodium humate |
| url | http://www.mdpi.com/2075-163X/8/10/463 |
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