Dechromization kinetics of limonitic laterite ores by alkali-roasting method using sodium hydroxide
文献类型：会议论文
| 作者 | Guo, Qiang1,2,3; Qu, Jingkui2,3; Han, Bingbing2,3; Wei, Guangye4; Qi, Tao2,3 |
| 出版日期 | 1905-07-03 |
| 会议日期 | May 28, 2011 - May 30, 2011 |
| 会议地点 | Changsha, China |
| 关键词 | Activation energy - Leaching - Kinetics - Ore roasting - Soils - Chromium - Ores - Calcination - Chromium compounds - Extraction - Particle size |
| 卷号 | 233-235 |
| DOI | 10.4028/www.scientific.net/AMR.233-235.798 |
| 页码 | 798-804 |
| 英文摘要 | A novel process was proposed for the activation pretreatment of Cr-containing limonitic laterite ores by NaOH roasting. The dechromization kinetics of the laterite ores and the effect of particle size, NaOH-ore ratio, and roasting temperature on Cr extraction were studied in detail. Experimental results indicate that decreasing the particle size and increasing the NaOH-ore ratio and roasting temperature increase the Cr extraction rate. Approximately 96% Cr in the laterite ores could be extracted under the optimal alkali-roasting conditions. The results also indicate that the Avrami model is suitable for the dechromization process and that the apparent activation energy is calculated 11.12 kJ mol-1. The 99.5% Cr2O3 was obtained from Na2CrO4 leached in the alkali solution by liquid-phase reduction and then calcining at high temperature. 漏 (2011) Trans Tech Publications, Switzerland. |
| 资助机构 | Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany |
| 会议录 | 2011 International Conference on Chemical Engineering and Advanced Materials, CEAM 2011
 |
| 学科主题 | Sodium Hydroxide |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/59525]  |
| 作者单位 | 1.Graduate School of Chinese Academy of Sciences, Beijing 100190, China 2.National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Beijing 100190, China 3.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 4.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
| 推荐引用方式 GB/T 7714 | Guo, Qiang,Qu, Jingkui,Han, Bingbing,et al. Dechromization kinetics of limonitic laterite ores by alkali-roasting method using sodium hydroxide[C]. 见:. Changsha, China. May 28, 2011 - May 30, 2011. |
入库方式： OAI收割
来源：过程工程研究所
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