Green metallurgical processing of chromite
文献类型：期刊论文
| 作者 | Zheng, S.; Zhang, Y.; Li, Z.; Qi, T.; Li, H.; Xu, H. |
| 刊名 | HYDROMETALLURGY
 |
| 出版日期 | 2006-08-01 |
| 卷号 | 82期号:3-4页码:157-163 |
| 关键词 | chromite chromate sub-molten potassium hydroxide kinetics thermodynamics green processing |
| ISSN号 | 0304-386X |
| 其他题名 | Hydrometallurgy |
| 中文摘要 | A new green metallurgical process for chromite ore has been proposed and developed to solve the serious environmental problem in the traditional production process of chromate. In the new process, the oxidation of chromite ore is carried out in submolten potassium hydroxide at 300 degrees C. Compared with the traditional roasting process in a rotary kiln at 1200 degrees C, the oxidation and mass transfer are greatly intensified in the new process. Chemical conversion of chromium is above 99% and the recovery of chromium is raised by more than 20% while the reaction temperature is dropped by 900 degrees C. Thus the energy consumption is decreased. Furthermore, as no limestone or dolomite additives are required, the amount of chromium-containing residue is decreased from 2.5 tonnes to 0.5 tonnes with the production of 1.0 tonne of product in the new process. As all reactions and separating operations are performed in liquid media, pollution due to toxic dust is prevented. With the change of reaction medium, the new process achieves higher resource and energy utilization efficiency. At the same time, the new process also changes the physical and chemical properties of other components co-existing in the chromite ore. The process provides the possibility for virtually complete utilization of chromite and zero emission of residue. Thus, the clean production of chromate can be realized. (C) 2006 Elsevier B.V. All rights reserved. |
| 英文摘要 | A new green metallurgical process for chromite ore has been proposed and developed to solve the serious environmental problem in the traditional production process of chromate. In the new process, the oxidation of chromite ore is carried out in submolten potassium hydroxide at 300 degrees C. Compared with the traditional roasting process in a rotary kiln at 1200 degrees C, the oxidation and mass transfer are greatly intensified in the new process. Chemical conversion of chromium is above 99% and the recovery of chromium is raised by more than 20% while the reaction temperature is dropped by 900 degrees C. Thus the energy consumption is decreased. Furthermore, as no limestone or dolomite additives are required, the amount of chromium-containing residue is decreased from 2.5 tonnes to 0.5 tonnes with the production of 1.0 tonne of product in the new process. As all reactions and separating operations are performed in liquid media, pollution due to toxic dust is prevented. |
| 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] | CONCENTRATE ; WASTE ; ORE |
| 收录类别 | ISTP ; SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000240275900009 |
| 公开日期 | 2013-10-24 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/3987]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, S.,Zhang, Y.,Li, Z.,et al. Green metallurgical processing of chromite[J]. HYDROMETALLURGY,2006,82(3-4):157-163. |
| APA | Zheng, S.,Zhang, Y.,Li, Z.,Qi, T.,Li, H.,&Xu, H..(2006).Green metallurgical processing of chromite.HYDROMETALLURGY,82(3-4),157-163. |
| MLA | Zheng, S.,et al."Green metallurgical processing of chromite".HYDROMETALLURGY 82.3-4(2006):157-163. |
入库方式： OAI收割
来源：过程工程研究所
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