| Decomposition of chromite ore by oxygen in molten NaOH-NaNO3 | |
| Zhang, Yang1,2; Zheng, Shi-li1; Xu, Hong-bin1; Du, Hao1; Zhang, Yi1; Zheng, SL | |
| 2010-07-01 | |
| Source Publication | INTERNATIONAL JOURNAL OF MINERAL PROCESSING
 |
| ISSN | 0301-7516 |
| Volume | 95Issue:1-4Pages:10-17 |
| Abstract | An optimized process production of chromate by oxygen was proposed. The tests are executed by introducing NaNO3 to the decomposition process of chromite ore in molten NaOH to decrease the decomposition temperature. An interesting result is that the reaction temperature could decrease from above 500 degrees C to about 400 degrees C, and sodium nitrate has no consumption in the oxidation process, while the Cr yield is above 99%. Mechanism analysis shows that chromite ore is firstly oxidized by NaNO3, where NaNO2 is generated as a reduction product, and then is oxidized to NaNO3. NaNO3 plays the role of oxygen carrier, which can reduce the mass transfer resistance of oxygen. The kinetic study shows that the decomposition process was an internal diffusion controlled, with an apparent activation energy of 106 kJ/mol. Effects of liquid-to-ore ratio, chromite ore particle size, and reaction temperature on the decomposition of chromite ore were also studied. (C) 2010 Elsevier B.V. All rights reserved. |
| Keyword | Chromite Sodium Hydroxide Sodium Nitrate Sodium Nitrite Oxidation |
| Subtype | Article |
| WOS Headings | Science & Technology ; Technology ; Physical Sciences |
| DOI | 10.1016/j.minpro.2010.03.005 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | MANUFACTURING PROCESS ; POTASSIUM HYDROXIDE ; SODIUM CHROMATE ; SALTS |
| WOS Research Area | Engineering ; Mineralogy ; Mining & Mineral Processing |
| WOS Subject | Engineering, Chemical ; Mineralogy ; Mining & Mineral Processing |
| WOS ID | WOS:000279623500002 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Version | 出版稿 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/6124 |
| Collection | 湿法冶金清洁生产技术国家工程实验室 |
| Corresponding Author | Zheng, SL |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Yang,Zheng, Shi-li,Xu, Hong-bin,et al. Decomposition of chromite ore by oxygen in molten NaOH-NaNO3[J]. INTERNATIONAL JOURNAL OF MINERAL PROCESSING,2010,95(1-4):10-17. |
| APA | Zhang, Yang,Zheng, Shi-li,Xu, Hong-bin,Du, Hao,Zhang, Yi,&Zheng, SL.(2010).Decomposition of chromite ore by oxygen in molten NaOH-NaNO3.INTERNATIONAL JOURNAL OF MINERAL PROCESSING,95(1-4),10-17. |
| MLA | Zhang, Yang,et al."Decomposition of chromite ore by oxygen in molten NaOH-NaNO3".INTERNATIONAL JOURNAL OF MINERAL PROCESSING 95.1-4(2010):10-17. |
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| 20131115-1216-复件 1-s（778KB） | 限制开放 | CC BY-NC-SA | Application Full Text | |||
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