低碱度脱磷渣在转炉少渣冶炼中的作用  

Effect of Low Basicity Dephosphorization Slag in BOF Slagless Steelmaking

作　　者：何肖飞[1] 王新华[1] 梁秀兰[1] 李海波[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：《东北大学学报（自然科学版）》2015年第7期947-951,965,共6页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展计划项目(2010CB630806)

摘　　要：以SGRS工艺为基础,研究了低碱度脱磷渣在转炉少渣冶炼中的作用.根据少渣冶炼物料平衡原理,脱磷阶段结束炉渣碱度控制越低,相当于转炉回收利用的Ca O量越多,能够实现的钢液去Si量也越多.同时实验结果表明,随着脱磷渣碱度的降低,炉渣的熔化性能逐渐改善,带来脱磷阶段结束转炉倒渣量不断增加以及脱磷渣金属铁含量不断降低的有益效果.当脱磷渣碱度在1.2~1.8范围时,脱磷渣半球点温度基本控制在1 380℃以内,脱磷渣中的游离Ca O质量分数控制在0.7%左右的较低水平,同时转炉脱磷阶段结束转炉倒渣量基本可控制在8 t（210 t转炉）或5 t（100 t转炉）以上.Based on SGRS technology,the effect of lowbasicity dephosphorization（ De-P） slag in BOF slagless steelmaking was studied. According to the mass balance of slagless steelmaking,the lower the basicity of De-P slag is,the more Ca O will be recycled and the more desilicication of liquid steel will be attained. At the same time,the experimental results showthat,with the decrease of De-P slag basicity,the slag melting performance is gradually improved,leading to the beneficial outcomes of increasing the deslagging quantity and reducing the metallic iron content in De-P slag. When the basicity of De-P slag is 1. 2- 1. 8,the hemisphere temperature of De-P slag could be controlled below1 380 ℃,the free Ca O content of De-P slag could be controlled at around 0. 7%,and the amount of BOF deslagging in the end of De-P stage could be controlled more than 8 t（ 210 t BOF） or 5 t（ 100 t BOF）.

关 键 词：转炉 少渣冶炼 低碱度炉渣 脱磷 矿物相 

分 类 号：TF718[冶金工程—钢铁冶金]