超低硫钢精炼过程钢水温度变化分析  

Analysis of temperature variation of molten steel in refining process ultra-low sulphur steel

作　　者：黄翼飞[1] 熊玮[1] 樊智勇[1] 胡汉涛[2] 王俊凯[2] 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [2]宝山钢铁股份有限公司,上海201900

出　　处：《炼钢》2016年第5期62-66,71,共6页Steelmaking

基　　金：国家自然科学基金资助项目(51572203)

摘　　要：针对宝钢超低硫钢精炼过程中钢水温度波动较大的问题,在考察超低硫钢转炉→LF精炼→RH精炼→喂线→连铸全流程钢水温度的变化情况的基础上,利用MATLAB软件建立了出钢至连铸过程钢水温度预测模型,采用该模型对钢水温度进行了预报,平均误差在±8℃以内的占87.5%。计算结果表明：空包修理时间在1 h以内,进行10 min左右的快烘,出钢温度不低于1 650℃,传运时间不超过25 min,可使LF的进站钢水温度在1 580℃左右。LF供电前期钢水升温速度达到2.0℃/min,供电后期3.0~3.5℃/min,同时RH真空室内衬温度在1 250~1 300℃,减少RH过程温降,可保证LF精炼在连铸浇铸的时间内,完成较重的脱硫任务,使LF精炼处理与连铸相匹配。In order to solve the problem of big fluctuation of molten steel temperature in ultra-low sulphur steel refining process,a temperature prediction model of molten steel from tapping to casting was developed using the MATLAB language based on an investigation of molten steel temperature variation of the total procedure converter → LF refining →RH refining→wire feeding →casting. The molten steel temperature was predicted by the model,and the ratio of the average error within ±8 ℃was 87.5 %. The results showed that the molten steel temperature of LF-in could be about 1 580℃ if the following conditions were satisfied： maintenance time of ladle less than 1 hour, fast baking 10 minutes, temperature of tapping not lower than 1 650℃ and transport time less than 25 minutes. Molten steel heating rate was 2.0℃/rain in LF early power supply and 3.0- 3.5℃/rain in LF late power supply. Moreever,RH vacuum chamber inner liner was more than 1 250 - 1 300℃ to reduce molten steel temperature drop. It could meet the demand of refining time of LF no longer than oasting time under the premise of heavy desulfurization task-performing to make LF refining and casting match.

关 键 词：超低硫钢 钢水温度 优化措施 

分 类 号：TF769[冶金工程—钢铁冶金]