转炉终点钢水残锰含量及其影响因素分析-论文.doc

转炉终点钢水残锰含量及其影响因素分析 杨传信1、李鹏超1，2、薛正良2、卢昭军2、刘强2、李平2 （1.临沂华盛江泉管业有限公司，山东，临沂 276017；2.武汉科技大学 · 钢铁冶金及资源利用省部共建教育部重点实验室，湖北，武汉430081） 摘 要：通过对转炉终点生产数据和铁水成分的统计分析，研究了影响转炉终点钢水残锰含量的因素及其变化规律。研究表明，转炉终点碳含量和铁水硅含量对转炉终点钢水残锰含量及其收得率影响最大；提高转炉终渣碱度和终渣FeO含量对转炉终点钢水残锰含量及锰收得率产生不利影响。铁水初始锰含量升高有利于提高转炉终点钢水残锰含量，但锰的收得率反而下降；转炉终点钢水温度对锰收得率的影响不明显。 关键词：转炉，终点残锰，终点控制 The Residual Manganese Content in Molten Steel of End-point of BOF Operation and its influencing factors YANG Chuanxin1,LI Pengchao1,2, XUE Zhengliang2, LU Zhaojun2, LIU Qiang2, LI Ping1 1. Linyi Huasheng Jiangquan Pipes Co., Ltd., Linyi 276017; 2. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081 ABSTRACT: Through the statistical analysis to the production data of end-point of BOF and the contents of molten iron, the factors affected end-point residual content of manganese of BOF and its law have been researched, which has illustrated that the end point carbon content of BOF and initial silicon content of molten iron are the key factors for end-point residual content of manganese and its yield rate. It’s disadvantageous for raising the basicity and FeO content of end slag of BOF to end-point residual content of manganese and its yield rate. Raising the manganese content of molten iron could increase the residual manganese content at end-point of BOF, but decrease its yield rate. The end temperature of molten steel in BOF is unessential to the yield rate of manganese. KEY WORDS：BOF, end-point residual content of manganese, end-point control 提高转炉钢水终点残锰含量是降低炼钢生产成本的重要手段，近年来国内许多钢厂开展了在转炉中加锰矿的“锰矿直接合金化”工业试验研究[1~4]，旨在提高转炉终点残锰含量，降低炉后合金化用锰铁单耗。临沂华盛江泉管业有限公司于2008年9月建成投产后，用120t顶底复吹转炉-120tLF精炼炉-八机八流合金钢连铸机生产20#优质碳素管坯钢，年产钢坯160万吨，棒材140万吨。500m3高炉投产以来，铁水锰含量波动在0.30~0.65%（平均0.42%）。为了使铁水中的锰在转炉终点钢水中尽可能多地保留下来，通过对转炉终点钢、渣成分分析和与铁水成分的对比，用统计分析的方法研究了相关工艺参数与转炉终点钢水残锰含量之间的关系，探讨影响转炉终点钢水残锰含量和锰收得率的因素，为转炉提高终点钢水残锰，进一步降低炼钢生产成本提供指导。 1. 冶炼工艺 临沂华盛江泉管业有限公司炼钢厂采用BOF-LF-CC工艺生产20#优质碳