首钢转炉炼钢高效复吹技术开发与应用  

Development and application of high efficiency blowing technology of converters in Shougang

作　　者：高攀 李海波 郭玉明[1] 张勇 赵晓东 于会香 王新华[1,2] 

机构地区：[1]首钢集团有限公司,北京100043 [2]北京科技大学绿色可循环钢铁流程北京市重点实验室,北京100043 [3]北京科技大学冶金与生态工程学院,北京100083

出　　处：《炼钢》2018年第1期1-9,共9页Steelmaking

摘　　要：为解决转炉高炉龄条件下,由于采用低底吹搅拌强度和溅渣护炉工艺导致的转炉实际底吹效果难以保证的问题,首钢股份公司迁安钢铁公司进行了转炉炼钢高效复吹技术开发。开发过程中,形成了一系列关键工艺技术,主要包括:底吹风口布置与熔池流场优化、溅渣护炉条件下的底吹风口裸露技术、底吹风口长寿命技术等,并开展了底吹模式优化,实现了转炉全炉役底吹效果稳定控制,在炉龄6 500炉左右时,炉役后期终点钢水碳氧积依旧能稳定控制在0.002 0以下。工艺技术应用后,生产低碳、超低碳钢(终点碳质量分数为0.025%~0.050%),吹炼终点钢水氧质量分数较前工艺平均降低0.025%以上,终渣TFe质量分数降低4%以上,耐火材料侵蚀明显降低,转炉脱磷效率明显提高。In order to solve the problem that the actual converter bottom blowing effect was difficult to guarantee due to low bottom blowing intensity and the slag splashing technology under high converter campaign life,high efficiency bottom blowing technology for converter steelmaking was developed in Shougang Qian＇an Iron and Steel Co.,Ltd.（SGQG）.During the development process,a series of key technologies such as optimization of bottom blowing tuyeres arrangement and pool mixing flow field,exposure technology of bottom blowing tuyeres under the conditions of slag splashing,bottom blowing tuyeres long life technology,etc.The optimization of bottom blowing mode was carried out,and the stable control of converter bottom blowing effect was achieved,even at the late age of the campaign,the carbon oxygen product could still be less than 0.002 0 under the converter campaign life of about 6 500.By applying the above technologies,in the production of ULC and IF steel（converter end point carbon mass fraction was 0.025 % ~ 0.050 %）,the average reduction of converter end oxygen mass fraction was more than 0.025 %,TFe mass fraction in end slag was more than 4 %,and the erosion of refractory materials was significantly reduced,converter dephosphorization efficiency was significantly improved.

关 键 词：转炉 复合吹炼 底吹搅拌强度 碳氧积 钢水氧含量 脱磷 

分 类 号：TF729[冶金工程—钢铁冶金]