40t钢包底吹优化物理模拟研究  

Physical Modeling Study of Argon Stirring Optimization on 40 t Ladle

作　　者：张乐辰[1,2] 包燕平[1,2] 郭宝奇 陈晋阳 范杰 彭声通 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]北京科技大学冶金与生态工程学院,北京100083 [3]攀钢集团长城特钢技术中心,四川江油621701

出　　处：《钢铁钒钛》2015年第2期132-138,共7页Iron Steel Vanadium Titanium

基　　金：中国博士后科学基金资助项目(2014M 560890)

摘　　要：通过建立相似比为1∶3钢包物理模型及与原型相同孔隙率的透气砖模型,研究不锈钢偏心吹氩工艺;对钢液混匀时间、钢液面流速及渣眼等软吹工艺参数进行优化。试验结果表明,钢液混匀底吹气量在103.1 L/h(现场流量2.1 m3/h)以上时,混匀时间比达到50%以上。钢液表面流速表明在液面隆起边缘处(渣眼边缘)容易发生卷渣。渣眼直径受到吹气孔位置影响,底吹气孔越靠近钢包包壁,渣眼直径越小。距圆心1/2R及2/3R处进行软吹搅拌,可保证渣眼面积比分别小于12.4%及10.5%。优化后的钢包流场可以有效减少静吹氩过程中产生的二次氧化现象。The eccentric argon stirring in stainless steel production has been studied by using geometric similarity 1 ： 3 water model and plug model which has the same porosity to plug used in production. The mixing time, velocity of liquid steel surface and open-eye are optimized. Experiment results show that when argon stirring rate exceeds 103.1 L/h （2.1 m3/h in production） the mixing time ratio （the minimum mixing time divided by mixing time at a certain flow rate） will be more than 50%. The velocity of liquid steel surface shows that storage area edge （ open-eye edge） is prone to entrap slag. The diameter of open-eye is affected by ladle wall where the closer distance from porous plug to ladled wall causes the smaller diameter of open-eye. Soft blowing with plug located at 1/2R and 2/3R will ensure the open-eye ratio less than 12.4% and 10.5% respectively. The optimized flow field can prevent argon stirring process from reoxidation effectively.

关 键 词：钢包 吹氩搅拌 水模型 透气砖布置 搅拌流量 渣眼 不锈钢 

分 类 号：TF769.2[冶金工程—钢铁冶金]