Decomposition of acid dissolved titanium slag from Australia by sodium hydroxide

稀有金属（英文版）, 2009, 25(6): 564-569. doi: 10.1007/s12598-009-0109-0

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.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

2.Institute of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

3.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

4.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

5.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

6.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

基金项目: 国家自然科学基金(50574084) the National Key Technologies R&D Program in the 11th Five-Year Plan Period of China(2006BAC02A05) 国家重点基础研究发展规划(973计划)(2007CB613501)

Decomposition of acid dissolved titanium slag from Australia by sodium hydroxide

FENG Yang ^1, , WANG Jinggang ^2, , WANG Lina ^3, , QI Tao ^4, , XUE Tianyan ^5, , CHU Jinglong ^6,

2.Institute of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

3.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

4.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

6.Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

Keywords： titanium slag

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 kJ·mol~(-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.%.

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Decomposition of acid dissolved titanium slag from Australia by sodium hydroxide

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