Extraction behaviours of titanium and other impurities in the decomposition process of ilmenite by highly concentrated KOH solution  

作　　者：Yu-min Liu Hua Lv Tao Qi Yi Zhang 

机构地区：[1]College of Chemistry and Environmental Science, Henan Normal University, Xinxiang 453007, China [2]Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2012年第1期9-14,共6页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.50574084);the Natural Science Research Project of the Education Department of Henan Province, China (No.2010B150014)

摘　　要：To effectively utilize ilmenite and recycle KOH solution, the extraction behaviours of titanium and other associated impurities in the decomposition process of ilmenite by highly concentrated KOH solution were studied. Experiments on the extraction behaviours of tita- nium as well as other associated impurities of ilmenite such as iron, silicon, calcium, and aluminium were carried out. The effects of various parameters, including reaction temperature, KOH concentration, reaction time, alkali-to-ore mass ratio, and particle size on the extraction rate of titanium and other impurities were examined. When the finely ground ore （58-75 ~tm） reacted with KOH solution （80wt%） in an al- kali-to-ore mass ratio of 7：1 at 260~C for 60 min, almost complete extraction of titanium was achieved, while the extraction rate of aluminium was 78% and that of other impurities was less than 22%. Moreover, high purity （98.2wt%） TiO2 with the anatase structure could be gained in the purification process.To effectively utilize ilmenite and recycle KOH solution, the extraction behaviours of titanium and other associated impurities in the decomposition process of ilmenite by highly concentrated KOH solution were studied. Experiments on the extraction behaviours of tita- nium as well as other associated impurities of ilmenite such as iron, silicon, calcium, and aluminium were carried out. The effects of various parameters, including reaction temperature, KOH concentration, reaction time, alkali-to-ore mass ratio, and particle size on the extraction rate of titanium and other impurities were examined. When the finely ground ore （58-75 ~tm） reacted with KOH solution （80wt%） in an al- kali-to-ore mass ratio of 7：1 at 260~C for 60 min, almost complete extraction of titanium was achieved, while the extraction rate of aluminium was 78% and that of other impurities was less than 22%. Moreover, high purity （98.2wt%） TiO2 with the anatase structure could be gained in the purification process.

关 键 词：ILMENITE titanium dioxide potassium hydroxide LEACHING 

分 类 号：TS202.3[轻工技术与工程—食品科学] TL941.19[轻工技术与工程—食品科学与工程]