Roasting temperature effect on the recovery of refractory gold and silver in pyrite concentrates
Pyrite concentrates with refractory gold and silver were roasted at different temperatures to improve the recovery of the metals by cyanide leaching. Scanning Electron Microscope characterization of the calcine revealed that the gold occluded in the pyrite less than one micron, and roasting produced...
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| Format: | Article |
| Language: | English |
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University of Belgrade, Technical Faculty, Bor
2021-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2021/1450-53392100019Z.pdf |
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| author | Zhang Y.-P. Yang K. Fang Y. Robledo-Cabrera A. Peng C.-S. Lopez-Valdivieso A. |
| author_facet | Zhang Y.-P. Yang K. Fang Y. Robledo-Cabrera A. Peng C.-S. Lopez-Valdivieso A. |
| author_sort | Zhang Y.-P. |
| collection | DOAJ |
| description | Pyrite concentrates with refractory gold and silver were roasted at different temperatures to improve the recovery of the metals by cyanide leaching. Scanning Electron Microscope characterization of the calcine revealed that the gold occluded in the pyrite less than one micron, and roasting produced channels in the concentrate, exposing the gold particles to the leaching solution. Gold and silver recoveries were maximum in the temperature range of 500-600°C due to the calcine high surface area and porosity. The Au and Ag recovery improved from 25 to 86% and 50 to 73%, respectively. The Au secondary encapsulation due to the sintering, the formation of the Ag-Fe-S species (Fe1−xS + Ag2S + Ag) and Ag ferrite in higher roasting temperatures hence Au and Ag recoveries decreased. |
| format | Article |
| id | doaj-art-36f83e25682348b4aec50046d0fef329 |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-36f83e25682348b4aec50046d0fef3292025-02-02T10:14:35ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752021-01-0157223524310.2298/JMMB200911019Z1450-53392100019ZRoasting temperature effect on the recovery of refractory gold and silver in pyrite concentratesZhang Y.-P.0Yang K.1Fang Y.2Robledo-Cabrera A.3Peng C.-S.4Lopez-Valdivieso A.5Instituto de Metalurgia, Universidad Autónoma de San Luis Potosí, San Luis Potosí, MexicoInstituto de Metalurgia, Universidad Autónoma de San Luis Potosí, San Luis Potosí, MexicoInstituto de Metalurgia, Universidad Autónoma de San Luis Potosí, San Luis Potosí, MexicoInstituto de Metalurgia, Universidad Autónoma de San Luis Potosí, San Luis Potosí, MexicoSchool of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing, ChinaInstituto de Metalurgia, Universidad Autónoma de San Luis Potosí, San Luis Potosí, MexicoPyrite concentrates with refractory gold and silver were roasted at different temperatures to improve the recovery of the metals by cyanide leaching. Scanning Electron Microscope characterization of the calcine revealed that the gold occluded in the pyrite less than one micron, and roasting produced channels in the concentrate, exposing the gold particles to the leaching solution. Gold and silver recoveries were maximum in the temperature range of 500-600°C due to the calcine high surface area and porosity. The Au and Ag recovery improved from 25 to 86% and 50 to 73%, respectively. The Au secondary encapsulation due to the sintering, the formation of the Ag-Fe-S species (Fe1−xS + Ag2S + Ag) and Ag ferrite in higher roasting temperatures hence Au and Ag recoveries decreased.http://www.doiserbia.nb.rs/img/doi/1450-5339/2021/1450-53392100019Z.pdfgold recoverysilver recoveryroastinggold refractorycyanide leaching |
| spellingShingle | Zhang Y.-P. Yang K. Fang Y. Robledo-Cabrera A. Peng C.-S. Lopez-Valdivieso A. Roasting temperature effect on the recovery of refractory gold and silver in pyrite concentrates Journal of Mining and Metallurgy. Section B: Metallurgy gold recovery silver recovery roasting gold refractory cyanide leaching |
| title | Roasting temperature effect on the recovery of refractory gold and silver in pyrite concentrates |
| title_full | Roasting temperature effect on the recovery of refractory gold and silver in pyrite concentrates |
| title_fullStr | Roasting temperature effect on the recovery of refractory gold and silver in pyrite concentrates |
| title_full_unstemmed | Roasting temperature effect on the recovery of refractory gold and silver in pyrite concentrates |
| title_short | Roasting temperature effect on the recovery of refractory gold and silver in pyrite concentrates |
| title_sort | roasting temperature effect on the recovery of refractory gold and silver in pyrite concentrates |
| topic | gold recovery silver recovery roasting gold refractory cyanide leaching |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2021/1450-53392100019Z.pdf |
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