82B硬线钢精炼渣和夹杂物研究  

Study on refining slag and inclusions in 82B hard wire steel

作　　者：丁宁[1,2] 包燕平[1] 解家英[2] 周德[2] 孔祥涛[2] 王立峰[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]首钢技术研究院,北京100043

出　　处：《北京科技大学学报》2012年第8期883-886,共4页Journal of University of Science and Technology Beijing

摘　　要：从Al2O3活度和夹杂物成分两方面来研究精炼渣对夹杂物的影响.采用Factsage软件对CaO—Al2O3—SiO2—MgO(8%)—CaF2(8%)炉渣中Al2O3活度进行了计算,并研究了碱度和(MgO)含量对Al2O3活度的影响.当炉渣碱度从1.0增加到2.0时,炉渣中Al2O3活度随着炉渣碱度的增加而降低;当炉渣碱度从2.0增加到3.8时,Al2O3活度变化幅度很小;(MgO)质量分数分别为5%和8%的渣,Al2O3活度差距较小;在碱度高的炉渣中[Al]s容易被从炉渣还原到钢水中.在使用高碱度精炼渣的盘条中发现许多含有MgO的硬性夹杂物,并对此进行了分析,最后得出最适宜的炉渣碱度为2.5～3.0.The effect of refining slag on inclusions was studied from two aspects, the activity of A1203 and the composition of inclusions. The activity of A1203 in a CaO-A1203-SiO2-MgO（8% ）-CaF2 （8%） slag was calculated by the thermodynamic software Factsage, and the influence of slag basicity and （MgO） content on the activity of A1203 were analyzed. When the slag basicity increa- ses from 1.0 to 2. 0, the activity of A1203 in the slag decreases rapidly, and when the slag basicity increases from 2.0 to 3. g, the activity of A12 O3 has little change. There is little difference in the activity of A1203 between the slags with （MgO） mass fractions of 5% and 8% , and [ A1]l can be easily reduced into molten steel from the slag with high basicity. Many brittle inclusions containing MgO were found in wire rods with the high basicity refining slag, and by analysis the most appropriate basicity is 2.5 to 3.0.

关 键 词：精炼 炉渣 夹杂物 氧化铝 氧化镁 

分 类 号：TF703.6[冶金工程—钢铁冶金]