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

作　　者：Yan-fang Han Ti-changSun Jie Li Tao Qi Li-na Wang Jing-kui Qu 

机构地区：[1]School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China [2]National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China [3]Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2012年第3期205-211,共7页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Key Technologies R & D Program of China (No.2006BAC02A05);the National Basic Research Program of China (No. 2007CB613501);the Knowledge Innovation Program of the Chinese Academy of Sciences (No.KGCX2-YW-214);the Special Funds of "Mountain Tai Scholar" Construction Project

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℃ 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 0.1-0.4μm 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.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℃ 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 0.1-0.4μm 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.

关 键 词：SLAGS titanium dioxide molten salt method PIGMENTS 

分 类 号：TQ246.31[化学工程—有机化工] X16[环境科学与工程—环境科学]