Kinetic Investigations on the Leaching of Niobium from  a Low-Grade Niobium-Tantalum Ore by Concentrated KOH Solution

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	Kinetic Investigations on the Leaching of Niobium from a Low-Grade Niobium-Tantalum Ore by Concentrated KOH Solution
	Zhou Hongming; Zheng Shili; Zhang Yi
	2004
Source Publication	中国化学工程学报：英文版
ISSN	1004-9541
Volume	12.0 Issue:002 Pages:202
Abstract	The leaching kinetics of niobium from a low-gr~te niobium-tantalum ore by concentrated KOH solution under atmospheric pressure has been studied. Significant effects of reaction temperature, KOH concentration,stirring speed, particle size and mass ratio of alkali-to-ore on the dissolution rate of niobium were examined. The experimental data of the leaching rates and the observed effects of the relevant operating variables were well interpreted with a shrinking core model under diffusion control. By using the Arrhenius expression, the apparent activation energy for the dissolution of niobium was evaluated. Finally, on the base of the shrinking core model, the rate equation was established.
Keyword	铌动力学过滤技术钽 KOH 扩散控制温度
Language	英语
Document Type	期刊论文
Identifier	http://ir.ipe.ac.cn/handle/122111/44630
Collection	中国科学院过程工程研究所
Affiliation	中国科学院过程工程研究所
First Author Affilication	中国科学院过程工程研究所
Recommended Citation GB/T 7714	Zhou Hongming,Zheng Shili,Zhang Yi. Kinetic Investigations on the Leaching of Niobium from a Low-Grade Niobium-Tantalum Ore by Concentrated KOH Solution[J]. 中国化学工程学报：英文版,2004,12.0(002):202.
APA	Zhou Hongming,Zheng Shili,&Zhang Yi.(2004).Kinetic Investigations on the Leaching of Niobium from a Low-Grade Niobium-Tantalum Ore by Concentrated KOH Solution.中国化学工程学报：英文版,12.0(002),202.
MLA	Zhou Hongming,et al."Kinetic Investigations on the Leaching of Niobium from a Low-Grade Niobium-Tantalum Ore by Concentrated KOH Solution".中国化学工程学报：英文版 12.0.002(2004):202.

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