板坯连铸结晶器吹氩工艺参数优化  

Optimization of process parameters for argon blowing in slab caster mold

作　　者：杨雪萍[1,2] 李光强[1,2] 饶江平[2,3] 杨治争[2,4] 

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [2]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 [3]武汉钢铁股份有限公司炼钢总厂,湖北武汉430083 [4]武汉钢铁(集团)公司研究院,湖北武汉430080

出　　处：《武汉科技大学学报》2016年第1期12-18,共7页Journal of Wuhan University of Science and Technology

基　　金：湖北省自然科学基金资助项目(2008CAD010)

摘　　要：采用流体体积(VOF)方法和拉格朗日离散模型建立了反映230mm×1100mm板坯连铸结晶器吹氩过程中钢液、熔渣和氩气气泡流动行为的数学模型,通过数值模拟方法研究吹氩量、拉坯速度和水口浸入深度等工艺参数对结晶器内钢/渣界面行为特征的影响规律。结果表明,吹氩会明显加剧水口附近的钢/渣界面波动,选择合适的拉坯速度能有效降低该处的界面波动幅度,同时吹氩有利于减缓结晶器弯月面处的液面波动,可在一定程度上达到稳定钢/渣界面的目的。从16种工艺配置方案中优化出该结晶器的最佳吹氩工艺参数为:拉坯速度1.2m/min,吹氩量9L/min,水口浸入深度120mm。Using VOF （volume of fluid） method and Lagrange discrete phase model, this paper established the mathematical models of the flow behaviors of molten steel, liquid slag and argon bubbles during argon blowing in a slab continuous casting mold （230 minx 1100 mm）. Effects of such process parameters as argon blowing rate, casting speed and nozzle immersion depth on the steel/slag interra- cial behavior characteristics in the mold were studied by numerical simulation. The results show that argon blowing obviously expands the fluctuation range of the steel/slag interface near the nozzle, while this range can be effectively reduced with proper casting speed. At the same time, argon blo- wing reduces the fluctuation of molten steel near the meniscus area of the mold, which can stabilize the steel/slag interface to some extent. The best process scheme for this mold is selected from sixteen ones, and the optimal parameter values of casting speed, argon blowing rate and nozzle immersion depth are 1.2 m/min, 9 L/min and 120 mm, respectively.

关 键 词：结晶器 吹氩 板坯连铸 钢液流动 钢/渣界面 数值模拟 参数优化 

分 类 号：TF777[冶金工程—钢铁冶金]