Removal behavior and technics of simultaneous desiliconization and removing manganese and titanium in hot metal

Based on the test of 1 kg molten iron in molybdenum-wound furnace and 10 kg molten iron in induction furnace, the influences of slag basicity, temperature of molten iron on simultaneous desiliconization and removing Mn and Ti were studied, and the removal behavior was systemically analyzed. The results show that the temperature of molten iron and the slag basicity do not contribute to desiliconisation and removal of Ti in molten iron, but affect demanganization very much, lower temperature and lower slag basicity are available to demanganization. When the hot metal temperature T=1 280℃ and the slag basicity R=0.44, the final content of[Si],[Ti] and[Mn] can reach 0.011%, less than 0.005%, and 0.024%, respectively, which meet the requirement of Mn content in high-pure pig iron.