An investigation on the kinetics of chromium dissolution from Philippine chromite ore at high oxygen pressure in KOH sub-molten salt solution
文献类型：期刊论文
| 作者 | Chen, Gang1,2,3; Wang, Jiajun4; Wang Xiaohui1,2; Zheng, Shi-Li1,2; Du, Hao1,2; Zhang, Yi1,2 |
| 刊名 | HYDROMETALLURGY
 |
| 出版日期 | 2013-07-01 |
| 卷号 | 139期号:0页码:46-53 |
| 关键词 | Chromite ore Kinetics Oxygen pressure leaching Sub-molten salt Oxidization |
| 英文摘要 | The dissolution kinetics of chromite ore at high oxygen pressure in KOH sub-molten salt solution was systematically investigated in this work. The effects of KOH concentration, agitation speed, oxygen pressure, oxygen flow rate, particle size and leaching temperature on the chromium leaching rate were discussed in detail. The results indicate that the leaching rate is independent of agitation when the agitation speed is above 1100 rpm and is not sensitive to the oxygen flow rate. However, the leaching rate increases with the increment of temperature, oxygen partial pressure, as well as the decrease of particle size. The oxidization product remains as an "ash" layer during the leaching process. The kinetics study shows that the dissolution process is controlled by internal diffusion of the reactants. The determined activation energy is 44.31 kJ/mol and the reaction order with respect to the oxygen pressure is 0.68. Finally, a dissolution rate equation is derived to describe the process. (C) 2013 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Metallurgy & Metallurgical Engineering |
| 研究领域[WOS] | Metallurgy & Metallurgical Engineering |
| 关键词[WOS] | TEMPERATURE ; SOLUBILITY ; MINERALS ; OXIDE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000326139000007 |
| 公开日期 | 2015-05-27 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/13416]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Gang,Wang, Jiajun,Wang Xiaohui,et al. An investigation on the kinetics of chromium dissolution from Philippine chromite ore at high oxygen pressure in KOH sub-molten salt solution[J]. HYDROMETALLURGY,2013,139(0):46-53. |
| APA | Chen, Gang,Wang, Jiajun,Wang Xiaohui,Zheng, Shi-Li,Du, Hao,&Zhang, Yi.(2013).An investigation on the kinetics of chromium dissolution from Philippine chromite ore at high oxygen pressure in KOH sub-molten salt solution.HYDROMETALLURGY,139(0),46-53. |
| MLA | Chen, Gang,et al."An investigation on the kinetics of chromium dissolution from Philippine chromite ore at high oxygen pressure in KOH sub-molten salt solution".HYDROMETALLURGY 139.0(2013):46-53. |
入库方式： OAI收割
来源：过程工程研究所
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