Electrochemical enhanced oxidative decomposition of chromite ore in highly concentrated KOH solution
文献类型：期刊论文
| 作者 | Wang, Zhonghang1,2; Du, Hao1; Wang, Shaona1; Zheng, Shili1; Zhang, Yi1; Hwang, Seyeon3; Kim, Nam Soo3; Jeong, Tae Eui4 |
| 刊名 | MINERALS ENGINEERING
 |
| 出版日期 | 2014-03-01 |
| 卷号 | 57期号:1页码:16-24 |
| 关键词 | Electrochemical Chromite ore KOH Sub-molten salt |
| ISSN号 | 0892-6875 |
| 其他题名 | Miner. Eng. |
| 中文摘要 | A novel method which introduces an electrochemical field to enhance the oxidative decomposition of chromite in a KOH sub-molten salt medium was proposed and proven to be feasible and efficient. Under optimal reaction conditions (slot current density 750 A/m(2), alkali concentration 60 wt.%, reaction temperature 150 degrees C, alkali-to-ore mass ratio 6:1, and particle size <200 mesh), the extraction rate of chromium reached 99%, after reacting for 480 min. in comparison with the current liquid-phase oxidation technologies, the reaction temperature in the new approach is 150-250 degrees C lower, and the alkali concentration of the reaction medium is lower by more than 20%, showing substantial advantages in terms of energy efficiency, equipment corrosion alleviation and prospects for industrial application. The reaction kinetics study shows that the extraction process under optimal reaction conditions is jointly governed by surface chemical reaction and solid product layer diffusion with the apparent activation energy calculated to be 17.56 kJ/mol. (C) 2013 Elsevier Ltd. All rights reserved. |
| 英文摘要 | A novel method which introduces an electrochemical field to enhance the oxidative decomposition of chromite in a KOH sub-molten salt medium was proposed and proven to be feasible and efficient. Under optimal reaction conditions (slot current density 750 A/m(2), alkali concentration 60 wt.%, reaction temperature 150 degrees C, alkali-to-ore mass ratio 6:1, and particle size <200 mesh), the extraction rate of chromium reached 99%, after reacting for 480 min. in comparison with the current liquid-phase oxidation technologies, the reaction temperature in the new approach is 150-250 degrees C lower, and the alkali concentration of the reaction medium is lower by more than 20%, showing substantial advantages in terms of energy efficiency, equipment corrosion alleviation and prospects for industrial application. The reaction kinetics study shows that the extraction process under optimal reaction conditions is jointly governed by surface chemical reaction and solid product layer diffusion with the apparent activation energy calculated to be 17.56 kJ/mol. (C) 2013 Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology ; Physical Sciences |
| 类目[WOS] | Engineering, Chemical ; Mineralogy ; Mining & Mineral Processing |
| 研究领域[WOS] | Engineering ; Mineralogy ; Mining & Mineral Processing |
| 关键词[WOS] | MANUFACTURING PROCESS ; POTASSIUM HYDROXIDE ; SODIUM CHROMATE ; ELECTRODE ; OXYGEN ; ELECTROOXIDATION ; THERMODYNAMICS ; SLURRIES ; KINETICS ; LITHIUM |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000331686700003 |
| 公开日期 | 2014-05-06 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/8088]  |
| 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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Texas El Paso, El Paso, TX 79968 USA 4.Seokyeong Univ, Seoul 136704, South Korea |
| 推荐引用方式 GB/T 7714 | Wang, Zhonghang,Du, Hao,Wang, Shaona,et al. Electrochemical enhanced oxidative decomposition of chromite ore in highly concentrated KOH solution[J]. MINERALS ENGINEERING,2014,57(1):16-24. |
| APA | Wang, Zhonghang.,Du, Hao.,Wang, Shaona.,Zheng, Shili.,Zhang, Yi.,...&Jeong, Tae Eui.(2014).Electrochemical enhanced oxidative decomposition of chromite ore in highly concentrated KOH solution.MINERALS ENGINEERING,57(1),16-24. |
| MLA | Wang, Zhonghang,et al."Electrochemical enhanced oxidative decomposition of chromite ore in highly concentrated KOH solution".MINERALS ENGINEERING 57.1(2014):16-24. |
入库方式： OAI收割
来源：过程工程研究所
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