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半钢冶炼提高转炉终点碳出钢试验研究
Study on Improving Tapping-Carbon of Semi-Steel Steelmaking Converter
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- DOI:
- 作者:
- 陈均 王二军 李小勇 曾建华 梁新腾
CHEN Jun;WANG Eijun;LI Xiaoyong;ZENG Jianhua;LIANG Xinteng
- 作者单位:
- 攀钢集团研究院有限公司材料工程技术研究所 攀钢集团攀枝花钢钒有限公司提钒炼钢厂
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
- 关键词:
- 半钢 热补偿 成渣路线 脱磷 终点碳
semi-steel thermal compensation slag forming route dephosphorization carbon of the endpoint
- 摘要:
- 针对攀钢半钢冶炼提高转炉终点碳出钢存在的热源不足和脱磷难的问题,在采用半钢增硅热补偿工艺的基础上对炼钢转炉成渣路线进行了研究,制定了转炉脱磷保碳关键工艺参数。结果表明,在保证转炉脱磷效果的同时,重轨钢转炉终点钢液碳含量由0.068%提高到0.109%,Q系列钢终点钢液碳含量由0.053%提高到0.081%;终点钢液碳含量提高后,重轨及Q系列钢终点钢液氧活度分别降低180×10-6和291×10-6,终渣全铁含量TFe平均降低1.28%和1.96%。提高转炉终点碳出钢的新工艺推广应用后,在降低冶炼成本的同时,提高了钢液质量。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.