大管坯精炼渣研究及优化  

Optimization and research on refining slag of large tube billet

作　　者：林腾昌[1] 朱荣[1] 杨凌志[1] 王成杰[1] 宁建成[2] 宋景凌[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]湖南衡阳钢管(集团)有限公司,湖南衡阳421001

出　　处：《炼钢》2013年第2期14-18,共5页Steelmaking

摘　　要：采用化学分析、岩相分析、扫描电镜、模拟计算的方法研究了大管坯精炼渣系。结果表明,原渣系完全熔化温度高于1 440℃的比例为60%。岩相分析发现渣中高熔点2CaO.SiO2和3CaO.SiO2导致精炼渣黏度均在2 Pa.s以上。通过优化精炼渣组元并应用新渣系后,VD精炼后钢中平均w(T.O)降低了5×10-6,平均w(N)降低了15×10-6,平均w(S)降低了60%,最低w(S)可控至0.003%。The refining slag series of large tube blank is studied by methods of chemical analysis, lithofacies analysis, SEM and simulative calculation. The results show that the percentage of original slag higher than 1 440 ~C is 60 % of the total melting temperature. The high proportion of 2CaO·SiO2 and 3CaO·SiO2 in the slag leads to the viscosity of refine slag above 2 Pa·s. After the optimization and application of new slag series, the mass fraction of average total oxygen is reduced by 5×10^-6 ,the mass fraction of average nitrogen reduced by 15 × 10^-6 ,and the mass fraction of average sulfur reduced by 60%after VD refining in the steel. The mass fraction of lowest sulphur is controlled to O. 003 %.

关 键 词：精炼渣 岩相 黏度 气体含量 脱硫 

分 类 号：TF534[冶金工程—钢铁冶金]