中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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
DOI10.4028/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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