摘要
通过几何相似比1:3.4的水模型对41～45 t原有圆形钢包和新型钢包冶金特性进行了对比,并得出最佳吹Ar的位置。结果表明,原有圆形钢包高径比比较大、混匀时间较长并且工艺稳定性不高;新型钢包降低了高径比,混匀时间显著缩短。同时发现新钢包底部使用单透气砖吹气比双透气砖吹气效果更好。生产实践表明,新型钢包加碳粉后混匀时间从原来的8～10 min减少到4 min,水口自动开浇率由80%提高至95%以上,钢材中大颗粒夹杂出现率由原来的3%降至1.5%以下。
Comparison between the metallurgical characteristics of 41～45 t original circular ladle and new-type ladle has been carried out by using geometric similarity ratio 1：3.4 water model and the optimum location of argon blowing is obtained. Results show that for original ladle the height-diameter ratio is rather large,the mixing time is longer and the process isn＇t stable;and for new ladle the height-diameter ratio decreases and the mixing time reduces obviously.While it is found that the blowing effect of single porous brick is better that of double porous bricks at new-type ladle bottom.Production practice indicates that with using new-type ladle the mixing time after adding carbon powder decreases from original 8～10 min to 4 min,the nozzle auto-open pouring ratio increases from 80%to more than 95%,and the large inclusion occurrence ratio in steel products decreases from original 3%to 1.5%.
出处
《特殊钢》
北大核心
2011年第1期1-4,共4页
Special Steel
关键词
新型钢包
钢液流动
水模型
混匀时间
New-Type Ladle
Liquid Steel Flow
Water Model
Mixing Time
