Decomposition of acid dissolved titanium slag from Australia by sodium hydroxide

作     者：FENG Yang WANG Jinggang WANG Lina QI Tao XUE Tianyan CHU Jinglong 

作者机构：Institute of Chemical Engineering Beijing University of Chemical Technology Beijing 100029 China Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China School of Chemical Engineering Dalian University of Technology Dalian 116024 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2009年第28卷第6期

页      面：564-569页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China (No.50574084) the National Key Technologies R&D Program in the 11th Five-Year Plan Period of China (No.2006BAC02A05) the National Basic Research Program of China (No.2007CB613501) 

主　　题：titanium slag titanium dioxide decomposition NaOH system kinetics 

摘      要：The kinetics of the decomposition of acid dissolved titanium slag with a sodium hydroxide system under atmospheric pressure was studied. The effect of reaction temperature, particle size and NaOH-to-slag mass ratio on titanium extraction was investigated. The results show that temperature and particle size have significant influence on titanium extraction. The experimental data of titanium extraction show that the shrinking core model with chemical reaction controlled process is most applicable for the decomposition of slag, with an apparent activation energy of 62.4 ***^-1. Approximately 85 wt.%-90 wt.% of the titanium can be extracted from the slag under the optimal conditions. In addition, the purity of titanium dioxide obtained in the product is up to 98.5 wt.%.