高级别管线钢超低硫控制研究

来源期刊：钢铁2009年第5期

论文作者：李太全 包燕平 吴华杰 刘建华

文章页码：35 - 38

关键词：硫容量； 精炼渣； 光学碱度

Key words：sulfide capacity； refining slag； optical basicity

摘    要：利用光学碱度计算了1873 K时CaO-SiO₂-Al₂O₃-MgO(10%)四元精炼渣系的硫容量,从理论上分析了精炼高级别管线钢超低硫控制的工艺条件,绘制出精炼渣硫容量、渣中硫、钢中溶解氧与钢中硫的关系图。分析了某钢厂LF-VD高级别管线钢生产工艺,LF1(LF炉精炼初期)、LF2(LF炉精炼末期)和VD精炼渣的氧化能力w((MnO+FeO))分别为11.92%、2.00%和1.10%,精炼渣碱度分别为3.195、6.250和7.600,精炼渣的曼内斯曼指数M(R/w(Al₂O₃))分别为0.09、0.17和0.18,精炼渣硫容量C′S分别为0.010、0.022和0.023。钢中硫的质量分数从LF1的80×10^-6,降低到LF2的(20～30)×10^-6,并稳定在VD末期的20×10^-6以下,与理论计算相符。

Abstract: The variation of sulfide capacity with composition in the slag system CaO-SiO₂-Al₂O₃-MgO(10%) at 1 873 K was calculated by using the optical basicity.The high grade pipeline steel refining process arts to control super-low sulphide are analysised and the relationship figure of sulphide capacity,(%S), and is drawn.A LF-VD refining process was analysised.During the process of LF1(the primary state of LF process),LF2(the end of LF process) and VD,the(MnO+FeO)content of top-slag are 11.92%,2.00% and 1.1%;the basicity(R) of top-slag are 3.195,6.25 and 7.6;The M number(R/Al₂O₃) of top-slag are 0.09,0.17 and 0.18;the sulfide capacity(CS′) of top-slag are 0.01,0.022 and 0.023.And the of steel are 80×10^-6 during LF1,(20-30)×10^-6 during LF2,and below 20×10^-6 during VD,which is consistented with the calculating result.