OXIDATION OF VANADIUM-BEARING TITANATE SLAG

The phase composition of vanadium-bearing titanate slag, the chemical mechanisms of slag oxidation in air,,vith the participation of soda, a nd their influence on the behavior of vanadium are studied by means of X-ray phase analysis and optical and raster electron microscopy, On o xidizing slags with 5-10% soda at 1000 degrees C, the degree of conver sion of vanadium to soluble forms is 80-90%, In these conditions, the presence of free TiO2 in the system due to the formation of the solid solution Ti1-xVxO2 reduces the binding of vanadium in the soluble comp ounds. Increasing the soda consumption, which limits the release of fr ee TiO2 on slag oxidation, also facilitates the retention of the spine lide phase MgAl2O4, with partial localization of vanadium there.