钙线喂入量对Q355含钛铝镇静钢洁净度的影响  

Effect of calcium addition amount on cleanliness of Q355 Ti-bearing Al-killed steel

作　　者：张雅辰 邓志银[1,2] 刘晓峰 朱苗勇 ZHANG Yachen;DENG Zhiyin;LIU Xiaofeng;ZHU Miaoyong(Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),Northeastern University,Shenyang 110819,Liaoning,China;School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China;Steel Plant,Chongqing Iron and Steel Co.,Ltd.,Chongqing 401258,China)

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室,辽宁沈阳110819 [2]东北大学冶金学院,辽宁沈阳110819 [3]重庆钢铁股份有限公司炼钢厂,重庆401258

出　　处：《钢铁研究学报》2025年第2期164-172,共9页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(U20A20272、52074073);中央高校基本科研业务费资助项目(N2325035)。

摘　　要：为了进一步探究钙处理的影响,在国内某钢厂Q355含钛铝镇静钢精炼过程开展工业试验,通过调整喂钙线量研究不同Ca添加量对钢中非金属夹杂物以及洁净度的影响。结果表明,精炼过程夹杂物会向液相CaO-Al_(2)O_(3)夹杂物演变,不同钙线喂入量不会影响夹杂物的演变趋势。钙处理后钢中全氧含量升高,夹杂物平均尺寸减小,但会导致钢中大尺寸CaO-Al_(2)O_(3)夹杂物出现的频率增加,同时也加剧了耐火材料的侵蚀与剥落。在保证钢液可浇性的前提下,尽可能减少喂钙线量对钢液洁净度是有利的。如果没有钢液可浇性问题,甚至可以考虑取消钙处理。To further understand calcium treatment technology,industrial experiments were carried out in the refining process of Q355 Ti-bearing Al-killed steel grades,and the inclusions in steel and the cleanliness of the steel were investigated considering different feeding lengths of Ca wires.The results show that the solid inclusions during the refining process transformed into the liquid CaO-Al_(2)O_(3) inclusions,and the feeding length of calcium wires did not affect the evolution trend of the inclusions.After calcium treatment,the total oxygen content of the steel increased,while the average size of the inclusions decreased.Furthermore,both the occurrence of the large-sized CaO-Al_(2)O_(3) inclusions and the degradation of refractory wereaggravated by calcium treatment.After ensuring steel castability,a smaller feeding length of Ca wire is beneficial for the cleanliness of the steel.If there are no castability problems,calcium treatment can even be eliminated.

关 键 词：钙处理 洁净钢 夹杂物 液相 可浇性 

分 类 号：TF703.5[冶金工程—钢铁冶金]