Dechromization and dealumination kinetics in process of Na2CO3-roasting pretreatment of laterite ores
文献类型：期刊论文
| 作者 | Guo, Qiang1,2; Qu, Jing-kui1,2; Han, Bing-bing1,2; Wei, Guang-ye1,2; Zhang, Pei-yu1,2; Qi, Tao1,2 |
| 刊名 | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
 |
| 出版日期 | 2014-12-01 |
| 卷号 | 24期号:12页码:3979-3986 |
| 关键词 | dechromization dealumination kinetics Na2CO3-roasting pretreatment laterite ore nickel cobalt |
| ISSN号 | 1003-6326 |
| 其他题名 | Trans. Nonferrous Met. Soc. China |
| 中文摘要 | A novel process was proposed for the activation pretreatment of limonitic laterite ores by Na2CO3 roasting. Dechromization and dealumination kinetics of the laterite ores and the effect of particle size, Na2CO3-ore mass ratio, and roasting temperature on Cr and Al extraction were studied. Experimental results indicate that the extraction rates of Cr and Al are up to 99% and 82%, respectively, under the optimal particle size of 44-74 mu m, Na2CO3-to-ore mass ratio of 0.6:1, and temperature of 1000 degrees C. Dechromization within the range of 600-800 degrees C is controlled by the diffusion through the product layer with an apparent activation energy of 3.9 kJ/mol, and that it is controlled by the chemical reaction at the surface within the range of 900-1100 degrees C with an apparent activation energy of 54.3 kJ/mol. Besides, the Avrami diffusion controlled model with on apparent activation energy of 16.4 kJ/mol is most applicable for dealumination. Furthermore, 96.8% Ni and 95.6% Co could be extracted from the alkali-roasting residues in the subsequent pressure acid leaching process. |
| 英文摘要 | A novel process was proposed for the activation pretreatment of limonitic laterite ores by Na2CO3 roasting. Dechromization and dealumination kinetics of the laterite ores and the effect of particle size, Na2CO3-ore mass ratio, and roasting temperature on Cr and Al extraction were studied. Experimental results indicate that the extraction rates of Cr and Al are up to 99% and 82%, respectively, under the optimal particle size of 44-74 mu m, Na2CO3-to-ore mass ratio of 0.6:1, and temperature of 1000 degrees C. Dechromization within the range of 600-800 degrees C is controlled by the diffusion through the product layer with an apparent activation energy of 3.9 kJ/mol, and that it is controlled by the chemical reaction at the surface within the range of 900-1100 degrees C with an apparent activation energy of 54.3 kJ/mol. Besides, the Avrami diffusion controlled model with on apparent activation energy of 16.4 kJ/mol is most applicable for dealumination. Furthermore, 96.8% Ni and 95.6% Co could be extracted from the alkali-roasting residues in the subsequent pressure acid leaching process. |
| 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] | NICKELIFEROUS LATERITES ; LIMONITIC LATERITE ; SULFURIC-ACID ; PRESSURE |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000347620300032 |
| 公开日期 | 2015-04-01 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/11736]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.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 |
| 推荐引用方式 GB/T 7714 | Guo, Qiang,Qu, Jing-kui,Han, Bing-bing,et al. Dechromization and dealumination kinetics in process of Na2CO3-roasting pretreatment of laterite ores[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2014,24(12):3979-3986. |
| APA | Guo, Qiang,Qu, Jing-kui,Han, Bing-bing,Wei, Guang-ye,Zhang, Pei-yu,&Qi, Tao.(2014).Dechromization and dealumination kinetics in process of Na2CO3-roasting pretreatment of laterite ores.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,24(12),3979-3986. |
| MLA | Guo, Qiang,et al."Dechromization and dealumination kinetics in process of Na2CO3-roasting pretreatment of laterite ores".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 24.12(2014):3979-3986. |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。