高拉速连铸技术.ppt

1、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

2、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

3、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 Be

4、ijing -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

5、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,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 Beiji

6、ng -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 Metallur

7、gical 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,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,A平均赋值

8、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,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,北京科技大学冶金与生态工程学院,University of Sci

9、ence and Technology Beijing -School of Metallurgical and Ecological Engineering,水口角度对结晶器流场的影响,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,北京科技大学冶金与生态工程学院,University of Science and Technology Beijing -School of Metall

10、urgical and Ecological Engineering,水口堵塞、不对中对结晶器流场的影响,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,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

11、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,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,Univer

12、sity 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 Metallur

13、gical 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,北京科技大学冶金与生态工

14、程学院,University of Science and Technology Beijing -School of Metallurgical and Ecological Engineering,结论,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。 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。 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。 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。 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。 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 Tech