低磷钢生产过程中钢液回磷的研究  

Study on rephosphorization of low-phosphorus steel producing process

作　　者：杨克枝[1] 李晶[1] 蔡可森 周朝刚[1] 吴国平 曹余良 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]南京钢铁(集团)公司,江苏南京210035

出　　处：《钢铁研究》2013年第3期22-25,共4页Research on Iron and Steel

摘　　要：为满足低磷钢生产要求,结合南钢现场试验,从热力学角度分析了从转炉出钢到LF精炼结束的回磷过程。结果表明:转炉出钢处于回磷状态,通过提高出钢时渣中w(FeO+MnO),可以降低出钢时钢液的回磷趋势,有利于降低精炼终点钢中的w(P);采用Mn弱脱氧出钢,可使钢液中w(O)降低至0.032%左右,平均回磷量为3.7×10-6,Si-Mn脱氧可使钢液中w(O)降低至0.01%以下,平均回磷量为14.56×10-6;采用留钢留渣操作的炉次回磷量平均为7.5×10-6,未采用留钢留渣操作的炉次回磷量平均为13.2×10-6。In order to meet the production rephosphorization process of tapping to LF requirements of low-phosphorus steel, the refining was studied and analyzed from the point-view of thermodynamics combined with the site experiments happened in Nanjing Iron and Steel Group（NISG） in this paper. Results showed that the rephosphorus was to steel when tapping. The rephosphorization trend could be reduced by improving w（FeO＋MnO）, and w（P） in steel of refining could also be reduced. By employing Mn weak deoxidizing process after tapping could decline w （O） in steel to 0. 032 % approximately, the average phosphorization was 3.7 ×10^-6, employing Si-Mn deoxidizing process after tapping could decline w（O） in steel to less than 0.01%, the average phosphorization was 14.56 ×10^-6. By employing remaining steel-slag operation, the average phosphorization was 7.5 ×10^-6, without using remaining steel- slag operation, average phosphorization was 13. 2×10^-6.

关 键 词：回磷 留钢留渣 下渣量 

分 类 号：TF703.5[冶金工程—钢铁冶金]