Decomposition of acid dissolved titanium slag from Australia by sodium hydroxide

被引：29

作者：

Feng Yang ^{[1
,2
]}

Wang Jinggang ^{[2
]}

Wang Lina ^{[1
]}

Qi Tao ^{[1
]}

Xue Tianyan ^{[1
,3
]}

Chu Jinglong ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China

[2] Beijing Univ Chem Technol, Inst Chem Engn, Beijing 100029, Peoples R China

[3] Dalian Univ Technol, Sch Chem Engn, Dalian 116024, Peoples R China

来源：

RARE METALS | 2009年 / 28卷 / 06期

基金：

中国国家自然科学基金;

关键词：

titanium slag; titanium dioxide; decomposition; NaOH system; kinetics; SAND ILMENITE; SULFURIC-ACID; KINETICS;

D O I：

10.1007/s12598-009-0109-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

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 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.%.

引用

页码：564 / 569

页数：6

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