| 注流方式对大方坯连铸结晶器内钢水流动与温度状态影响 |
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| 引用本文： | 孙海波,韩占光,钱宏智,张家泉.注流方式对大方坯连铸结晶器内钢水流动与温度状态影响[J].北京科技大学学报,2010,32(9). |
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| 作者姓名： | 孙海波 韩占光 钱宏智 张家泉 |
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| 作者单位： | 北京科技大学生态与循环冶金教育部重点实验室,北京,100083 |
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| 摘 要： | 依据改变水口侧孔射流方向来控制结晶器内钢流流动状态的思想,设计了一种大方坯连铸结晶器新型四分切向水口.对不同类型水口(直通式、四分径向以及四分切向水口)浇注条件下大方坯连铸结晶器内钢水流动形态和温度分布状况进行了流体动力学比较研究.结果表明,新型四分切向水口不仅可以使结晶器内钢水形成上、下两个回流,并能够产生较强的水平旋流.该水平旋流能降低钢水的冲击深度,抑制钢液面波动,促进夹杂物上浮,还具有促进钢水过热耗散的效果.与四分径向水口相比,新型四分切向水口能减弱射流对初生坯壳的冲击,均匀横截面坯壳厚度.此外,该旋流状态使热中心上移,自由液面附近钢水的温度可提高2～6℃,改善化渣条件.
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| 关 键 词： | 方坯 连铸 结晶器 水口 旋流 |
Effects of injection modes on the flow pattern and temperature distribution of molten steel in a bloom casting mould |
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| SUN Hai-bo,HAN Zhan-guang,QIAN Hong-zhi,ZHANG Jia-quan.Effects of injection modes on the flow pattern and temperature distribution of molten steel in a bloom casting mould[J].Journal of University of Science and Technology Beijing,2010,32(9). |
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| Authors: | SUN Hai-bo HAN Zhan-guang QIAN Hong-zhi ZHANG Jia-quan |
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| Institution: | SUN Hai-bo,HAN Zhan-guang,QIAN Hong-zhi,ZHANG Jia-quan Key Laboratory of Ecological , Recycle Metallurgy Ministry of Education,University of Science , Technology Beijing,Beijing 100083,China |
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| Abstract: | Based on an idea that the flow pattern of molten steel in a mold can be controlled by changing the direction of jet from the outlets of a submerged entry nozzle (SEN),a new type of quad-furcated SEN with outlets in tangential direction was designed for bloom casting.The flow patterns and temperature distributions of molten steel in the mold were computed by hydrodynamic models under the conditions of single straight SENs,quad-furcated SENs with outlets in radial direction,and quad-furcated SENs with outlets... |
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| Keywords: | blooms continuous casting molds nozzles swirling flow |
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