Oxidation Roasting of Fine-Grained Carbonaceous Gold Ore: The Effect of Aeration Rate
The oxidation roasting of carbon-bearing micro-fine gold can eliminate or weaken the robbing effect of carbonaceous materials and clay, and destroy the encapsulation of micro-fine gold. The micropores produced by gas escaping during the roasting process are conducive to the diffusion of leaching age...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-05-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/11/6/558 |
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| author | Hui Li Wei Xiao Jianping Jin Yuexin Han |
| author_facet | Hui Li Wei Xiao Jianping Jin Yuexin Han |
| author_sort | Hui Li |
| collection | DOAJ |
| description | The oxidation roasting of carbon-bearing micro-fine gold can eliminate or weaken the robbing effect of carbonaceous materials and clay, and destroy the encapsulation of micro-fine gold. The micropores produced by gas escaping during the roasting process are conducive to the diffusion of leaching agents, thus enhancing the cyanide leaching of gold. In this paper, the influence of the aeration rate during roasting on the leaching rate of fine-grained carbonaceous gold ore and its mechanism were studied using thermodynamic calculations, crystal structure analysis, surface chemical groups and bonds analysis, microporous structure analysis, and surface morphology detection. Under suitable roasting conditions, the carbonaceous and pyrite in the ore are oxidized, while carbonate minerals such as dolomite and calcite as well as clay minerals are decomposed, and the gold-robbing materials lose their activity. The experimental results have theoretical and practical significance for the popularization and application of oxidation roasting technology of fine carbon-bearing gold ore. |
| first_indexed | 2024-03-10T11:05:20Z |
| format | Article |
| id | doaj.art-518cca40a0ce4da1aeca8ba88a64dc02 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T11:05:20Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-518cca40a0ce4da1aeca8ba88a64dc022023-11-21T21:12:32ZengMDPI AGMinerals2075-163X2021-05-0111655810.3390/min11060558Oxidation Roasting of Fine-Grained Carbonaceous Gold Ore: The Effect of Aeration RateHui Li0Wei Xiao1Jianping Jin2Yuexin Han3School of Resources Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaSchool of Resources Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaSchool of Resources and Civil Engineering, Northeastern University, Shenyang 110819, ChinaSchool of Resources and Civil Engineering, Northeastern University, Shenyang 110819, ChinaThe oxidation roasting of carbon-bearing micro-fine gold can eliminate or weaken the robbing effect of carbonaceous materials and clay, and destroy the encapsulation of micro-fine gold. The micropores produced by gas escaping during the roasting process are conducive to the diffusion of leaching agents, thus enhancing the cyanide leaching of gold. In this paper, the influence of the aeration rate during roasting on the leaching rate of fine-grained carbonaceous gold ore and its mechanism were studied using thermodynamic calculations, crystal structure analysis, surface chemical groups and bonds analysis, microporous structure analysis, and surface morphology detection. Under suitable roasting conditions, the carbonaceous and pyrite in the ore are oxidized, while carbonate minerals such as dolomite and calcite as well as clay minerals are decomposed, and the gold-robbing materials lose their activity. The experimental results have theoretical and practical significance for the popularization and application of oxidation roasting technology of fine carbon-bearing gold ore.https://www.mdpi.com/2075-163X/11/6/558carbonaceous fine-grained gold oresoxidation roastingaeration ratemicroporous structure |
| spellingShingle | Hui Li Wei Xiao Jianping Jin Yuexin Han Oxidation Roasting of Fine-Grained Carbonaceous Gold Ore: The Effect of Aeration Rate Minerals carbonaceous fine-grained gold ores oxidation roasting aeration rate microporous structure |
| title | Oxidation Roasting of Fine-Grained Carbonaceous Gold Ore: The Effect of Aeration Rate |
| title_full | Oxidation Roasting of Fine-Grained Carbonaceous Gold Ore: The Effect of Aeration Rate |
| title_fullStr | Oxidation Roasting of Fine-Grained Carbonaceous Gold Ore: The Effect of Aeration Rate |
| title_full_unstemmed | Oxidation Roasting of Fine-Grained Carbonaceous Gold Ore: The Effect of Aeration Rate |
| title_short | Oxidation Roasting of Fine-Grained Carbonaceous Gold Ore: The Effect of Aeration Rate |
| title_sort | oxidation roasting of fine grained carbonaceous gold ore the effect of aeration rate |
| topic | carbonaceous fine-grained gold ores oxidation roasting aeration rate microporous structure |
| url | https://www.mdpi.com/2075-163X/11/6/558 |
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