Study on Improving Tapping-Carbon of Semi-Steel Steelmaking Converter
Author of the article:CHEN Jun;WANG Eijun;LI Xiaoyong;ZENG Jianhua;LIANG Xinteng
Author's Workplace：Institute of Materials Engineering Technology, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, China;Vanadium Refinery Steelmaking Branch, Pangang Group Panzhihua Steel & Vanadium Co., Ltd., Panzhihua 617067, China
Key Words：semi-steel thermal compensation slag forming route dephosphorization carbon of the endpoint
Abstract：
Aiming at the shortage of heat source and difficulty of dephosphorization in improving the tapping-carbon of converter by semi-steel smelting at Pangang Group. The key technological parameters of dephosphorization and carbon preservation in converter are established. The results show that while ensuring the dephosphorization effect of converter, the tapping-carbon content of steel in the end of heavy rail steel converter increases from 0.068% to 0.109%, and that of steel in the end of Q series steel increases from 0.053% to 0.081%. After the increase of tapping-carbon content in end steel, the oxygen activity of heavy rail and Q series end steel decreased by 180×10-6 and 291×10-6, respectively, and the total iron TFe content of final slag decreased by 1.28% and 1.96% on average. After the extension and application of the new technology of improving the carbon steel at the end of converter, the quality of molten steel is improved while the smelting cost is reduced.
