中间包钢液中夹杂物去除的物理模拟研究  

Research on inclusion removal in tundish using physical simulation

作　　者：艾立群 赵定国 马海涛 倪国龙 王书桓 冯聚和 

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063009

出　　处：《连铸》2017年第1期8-12,共5页Continuous Casting

基　　金：国家自然科学基金项目(51304060)

摘　　要：建立了中间包1∶3水力学模型,对某厂连铸中间包由28 t扩容至40 t后,进行中间包结构优化。通过分析中间包挡墙、挡坝和覆盖剂作用,研究了中间包结构对夹杂物去除的影响规律。夹杂物去除物理模拟与计算结果均表明:粒子粒度分别为-30^-50、-50^-80、-80^-100、-100^-180和-180^-300目时,在中间包基本结构下,夹杂物去除率分别为97.9%、75.7%、64.0%、60.3%和56.3%,相比于中间包基本结构,挡坝内移1 cm对于各种尺寸的夹杂物的去除率均有提高,各尺寸夹杂物的去除率分别为98.7%、82.3%、66.6%、62.9%、57.4%;用混合油模拟中间包覆盖剂,各尺寸夹杂物的去除率分别为98.9%、87.43%、75.14%、70.0%、63.4%,中间包夹杂物的去除率进一步提高。实际生产过程中,中间包改造后,夹杂物尺寸变小,夹杂物数量明显减小,夹杂物的数量较中间包改造前减少了53%。A tundish hydraulic model of 1：3 was established for tundish structure optimization after the continuous casting tundish was expanded from 28t to 40t. The influence of tundish structure on inclusion removal was researched by analyzing the role of the tundish wall,dam and covering agent. The physical simulation and theoretical calculation results of inclusion removal show that the inclusion removal rates are 97.9%,75.7%,64.0%,60.3% and 56.3% with the basic tundish structure,when the sizes of particle are-30--50,-50--80,-80--100,-100--180 and-180--300 mesh respectively. Compared to the basic tundish structure,The inclusion removal rates of different particle sizes are increased to 98.7%,82.3%,66.6%,62.9% and 57.4%,when the dam is moved inward 1 cm;The inclusion removal rates of different particle sizes are further improved to 98.9%,87.43%,75.14%,70.0%,63.4%,when the mixed oil is used to simulate the covering agent of the tundish. In the actual production process,the size and the quantity of the inclusions are decreased obviously after the tundish is modified,and the quantity of the inclusions in tundish is reduced by 53% than before.

关 键 词：中间包 物理模拟 夹杂物 

分 类 号：TF777[冶金工程—钢铁冶金]