ILLUMENITE POWDER AND PRODUCTION THEREOF

摘要

PURPOSE:To obtain a well-balanced particle size distribution and to improve dispersibility, work efficiency and heat resistance by hydrothermally treating an alkaline Fe(OH)2 suspension contg. Ti (III). CONSTITUTION:An alkaline Fe(OH)2 suspension of 8.0-10.0pH contg. Ti (III) (e.g., TiCl3), Fe (II) (e.g., FeSO4) and alkali (e.g., Na2CO3) is hydrothermally treated at 200-300 deg.C in an autoclave and the resulting black precipitate is separated by filtration, washed and dried to obtain illumenite powder consisting of separate particles having 0.05-2.0mum average particle size and a well-balanced particle size distribution.