Knowledge Management System Of Institute of process engineering,CAS
| A new metallurgical process for the clean utilization of chromite ore | |
| Alternative Title | Int. J. Miner. Process. |
| Chen, Gang1,2; Wang, Xiaohui1; Wang, Jiajun3; Du, Hao1; Zhang, Ying1; Zheng, Shi-Li1; Zhang, Yi1 | |
| 2014-09-10 | |
| Source Publication | INTERNATIONAL JOURNAL OF MINERAL PROCESSING
 |
| ISSN | 0301-7516 |
| Volume | 131Issue:SEPPages:58-68 |
| Abstract | A new metallurgical process for extracting chromium from chromite ore is proposed to overcome the severe chromium (VI) pollution in chromate production industry. When the 60 wt.% KOH solution was used to decompose chromite ore, the chromium and iron ions in chromite ore were oxidized into soluble K(2)CraO(4) crystal and insoluble KFe3O5 particle, respectively. The chromium levels in the new residue meet the emission standard of chromium-containing waste due to the KFe3O5 crystal's compact appearance, hence the pollution problem of chromite ore process residue is thoroughly resolved. The effect of the main variables on this clean metallurgical process was systematically investigated. Under the condition of leaching temperature 200 degrees C, oxygen partial pressure 2.0 MPa, and particle size 0.045-0.063 mm, the chromium extraction reached up to 99.4% after 5 h reaction. There is no product layer existing during the leaching process, and the reaction rate is controlled by the surface reaction. The resistances of oxygen transport during the leaching process were calculated step by step, and the surface chemical reaction was the main resistance factor that was consistent with the kinetics study. (C) 2014 Elsevier B.V. All rights reserved.; A new metallurgical process for extracting chromium from chromite ore is proposed to overcome the severe chromium (VI) pollution in chromate production industry. When the 60 wt.% KOH solution was used to decompose chromite ore, the chromium and iron ions in chromite ore were oxidized into soluble K(2)CraO(4) crystal and insoluble KFe3O5 particle, respectively. The chromium levels in the new residue meet the emission standard of chromium-containing waste due to the KFe3O5 crystal's compact appearance, hence the pollution problem of chromite ore process residue is thoroughly resolved. The effect of the main variables on this clean metallurgical process was systematically investigated. Under the condition of leaching temperature 200 degrees C, oxygen partial pressure 2.0 MPa, and particle size 0.045-0.063 mm, the chromium extraction reached up to 99.4% after 5 h reaction. There is no product layer existing during the leaching process, and the reaction rate is controlled by the surface reaction. The resistances of oxygen transport during the leaching process were calculated step by step, and the surface chemical reaction was the main resistance factor that was consistent with the kinetics study. (C) 2014 Elsevier B.V. All rights reserved. |
| Keyword | Chromite Ore Chromium (Vi) Pollution Oxidative Leaching Kinetics Oxygen Transfer |
| Subtype | Article |
| WOS Headings | Science & Technology ; Technology ; Physical Sciences |
| DOI | 10.1016/j.minpro.2014.07.002 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | ELECTROLYTE-SOLUTIONS ; OXYGEN ; SOLUBILITY ; DIFFUSION ; WATER |
| WOS Research Area | Engineering ; Mineralogy ; Mining & Mineral Processing |
| WOS Subject | Engineering, Chemical ; Mineralogy ; Mining & Mineral Processing |
| WOS ID | WOS:000343376400008 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/11667 |
| Collection | 研究所（批量导入） |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China |
| Recommended Citation GB/T 7714 | Chen, Gang,Wang, Xiaohui,Wang, Jiajun,et al. A new metallurgical process for the clean utilization of chromite ore[J]. INTERNATIONAL JOURNAL OF MINERAL PROCESSING,2014,131(SEP):58-68. |
| APA | Chen, Gang.,Wang, Xiaohui.,Wang, Jiajun.,Du, Hao.,Zhang, Ying.,...&Zhang, Yi.(2014).A new metallurgical process for the clean utilization of chromite ore.INTERNATIONAL JOURNAL OF MINERAL PROCESSING,131(SEP),58-68. |
| MLA | Chen, Gang,et al."A new metallurgical process for the clean utilization of chromite ore".INTERNATIONAL JOURNAL OF MINERAL PROCESSING 131.SEP(2014):58-68. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| A new metallurgical （2232KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | Application Full Text | |
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