《高拉速连铸技术》PPT课件.ppt

北京科技大学冶金与生态工程学院高速板坯连铸结晶器流场研究北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 北京科技大学冶金与生态工程学院 钢铁生产流程及工序生产匹配University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 北京科技大学冶金与生态工程学院高效连铸的涵义高拉速高质量高作业率高连浇率高温铸坯University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 北京科技大学冶金与生态工程学院高速连铸的意义University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 北京科技大学冶金与生态工程学院板坯连铸现状高速连铸目标研究总体目标University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 北京科技大学冶金与生态工程学院现场调研 生产中存在的问题：水口结瘤 浇铸过程中液面时有裸露 液面波动University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 北京科技大学冶金与生态工程学院典型缺陷及夹杂物高拉速板坯连铸典型夹杂物形态University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 北京科技大学冶金与生态工程学院研究关键技术University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 北京科技大学冶金与生态工程学院高拉速连铸结晶器研究方法1:1高度仿真水模型，仿真水口和实际水口对比实验。CFX软件模拟计算，结晶器液面波动的瞬态模拟，研究液面波动影响因素及相互关系。液面波动、液面流速及与铸坯质量的关联检测。北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 数值模拟计算流程几何造型网格划分CFX前处理CFX计算CFX显示SOLIDWORK2004ANASYS ICEM 10ANASYS CFX 10ANASYS CFX 10ANASYS CFX 10北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 浸入式水口流场数值研究北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 浸入式水口出口流场对比塞棒滑板滑板底部突起水口底部水平水口底部凹陷水口北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 结晶器流场数值研究北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 拉速结晶器流场北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 拉速对结晶器流场的影响V0.9m/minV1.2m/minV1.6m/minV2.0m/min北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 水口控流方式对结晶器流场的影响ABCDA平均赋值B塞棒C、D滑板北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 水口浸入深度对结晶器流场的影响H300mmH100mmH150mmH170mmH200mmH250mmH300mm北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 水口底部结构对结晶器流场的影响A底部凸起水口B底部水平水口C底部凹陷水口北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 水口角度对结晶器流场的影响+10200北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 结晶器厚度对结晶器流场的影响230mm210mm180mm250mm北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 水口堵塞、不对中对结晶器流场的影响D30P10北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 水口吹氩量对结晶器流场的影响Ar=1NL/MINAr=2NL/MINAr=3NL/MINAr=1NL/MINAr=2NL/MINAr=3NL/MIN北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 水口吹氩对结晶器液面的影响不同吹氩量下结晶器液面氩气分布、分率和液面流速北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 水模实验装置及其流程图放水阀调节阀超声波流量计水泵中间包结晶器液位窗口计算机红外波高仪螺旋测速仪水利波高仪塞棒塞棒控制气瓶浮子流量计示踪剂加入补水管北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 单回流与双回流北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 水模实验北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 影响因素的显著性分析北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 影响因素的显著性分析北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 影响因素的显著性分析北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 结论最优工况断 面水口类型()拉速(B)m/min浸入深度(C)mm吹气流量(D)L/min95015凸底1.61500-5125025凸底1.41500-5155015凸底1.21700-518505凸底1.21500-5215015凹底0.81900-5北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 结论u数值模拟和冷态物理模拟均发现拉速是结晶器流场的显著性影响因素。u高拉速板坯连铸，结晶器液面波动严重，表面流速也产生重大变化。u高拉速板坯连铸，各工艺参数（水口倾角，浸入深度，水口底部结构，水口控流方式，吹氩量）对结晶器流场的影响与低拉速相同。但与低拉速连铸相比，工艺参数对结晶器流场的影响程度加剧。u高拉速窄板坯连铸过程，高速钢液流股冲击结晶器窄边，形成上下回流的同时出现侧旋流，不利于优质钢在结晶器内的浇注过程。u高拉速宽板坯连铸过程，高速钢液流股冲击结晶器熔池，造成熔池湍动振动，导致结晶器液面剧烈波动，与此同时结晶器表面流速偏低。u高拉速连铸过程合理使用电磁技术控制结晶器流场势在必行。北京科技大学冶金与生态工程学院University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 下一步工作、优化工艺参数提高拉速研究。、现场工艺实验研究。请各位专家批评指正！谢谢！University of Science and Technology Beijing-School of Metallurgical and Ecological Engineering 北京科技大学冶金与生态工程学院