Viscosity Property and Structure Analysis of FeO SiO2 V2O3 TiO2 Cr2O3 Slags
It is well known that vanadium titanium magnetite (VTM) is a characteristic resource in China, and the main route for the extraction of vanadium is by oxidizing the vanadium bearing hot metal in converter to form vanadiumbearing slag and semi steel.1 3) Since the blowing smelting time is merely 3 to 5 minutes, the thermodynamics and the dynamics conditions for oxidizing vanadium in hot metal are very important during the blowing smelting process.4,5) Thus, the properties of the slag, such as melting temperature and viscosity, are very crucial to improve the process conditions. With the gradual consumption of high quality VTM, the low grade bearing chromium VTM (namely the Hongge type V bearing titanomagnetite, with an approximate composition of 45.5 mass% T.Fe, 10.6 mass% TiO2, 0.4 mass% V2O5, and 0.2 mass% Cr2O3) has caused much attention and is beginning to be utilized in recent years. It is reported that the proven reserves of Hongge type V bearing titanomagnetite is about 2.0 billion tons in Panxi and Chengde regions of China.9,10) However, during the vanadiumextraction process, the viscosity of the slag increases after the chromium in the hot metal is oxidized to Cr2O3 and Viscosity Property and Structure Analysis of FeO SiO2 V2O3 TiO2 Cr2O3 Slags