Study on Determination of Composition of Converter Steelmaking Slags for Hot Metal Containing Vanadium and Titanium

The hot metal produced by Chonggang has 0.28% vanadium-titanium content,therefore the slag complete melting temperature is lower than that of common slag due to the action of vanadium-titanium oxide in smelting process. As a result,furnace lining is subject to serve erosion and leads a shorter campaign life. In order to address these issues the related research on adjusting slag melting temperature by controlling TFe content was carried out. The relationship between TFe content of slags containing vanadium-titanium oxide and slags complete melting temperature was studied in laboratory by using different basicity of slags. Based on the experimental results approriate content of TFe was obtained and plant trials were carried out. Industrial results indicated that when vanadium-titanium oxide was 4%,bacisity was 4.5,TFe was 21% and MgO was 9%,superheat of the studied slag were equal to that of common slag,and meet high requirements of efficient dephosphorization as well.