Preparation of titanium dioxide from titania-rich slag by molten NaOH method

被引：23

作者：

Han, Yan-fang ^{[1
,2
,3
]}

Sun, Ti-chang ^{[2
]}

Li, Jie ^{[1
,3
]}

Qi, Tao ^{[1
,3
]}

Wang, Li-na ^{[1
,3
]}

Qu, Jing-kui ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Civil & Environm Engn, Beijing 100083, Peoples R China

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

来源：

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2012年 / 19卷 / 03期

基金：

国家科技攻关计划;

关键词：

slags; titanium dioxide; molten salt method; pigments; SODIUM-HYDROXIDE; SULFURIC-ACID; ILMENITE; KINETICS; DECOMPOSITION;

D O I：

10.1007/s12613-012-0539-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Preparing titanium dioxide from titania-rich slag (TiO2 73wt%) by molten NaOH method has been developed. The effects of temperature and reaction time on the titanium conversion were investigated. The results showed that temperature had significant influence on the titanium conversion as well as the structure of the product. About 92% of titanium in the titania-rich slag could be converted after reacting with NaOH at 500 degrees C for 1 h. Metatitanic acid was formed through the steps of washing treatment, acid dissolution, and hydrolysis. Well-dispersed spherical titanium dioxide particles with an average size of 0.1-0.4 mu m can be obtained by calcination of metatitanic acid. In addition, the content of titanium dioxide in the product is up to 98.6wt%, which can be used as pigments after further treatment of coating and crushing.

引用

页码：205 / 211

页数：7

共 15 条

[1] TIO2 PIGMENT TECHNOLOGY - A REVIEW [J].