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Experimental Study of Fluid Flow in Thin Slab Continuous Caster Mould with water-model

International Journal of Minerals,Metallurgy and Materials 1999年第1期13卷 15-19页

作者： Yanping Bao Jianqiang Zhu Naiyuan Tian Baomei Xu(Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China) Metallurgy School University of Science and Technology Beijing Beijing 100083 China

model study is an efficient method for optimizing the siructure of the mould and the submerged entry nozzle (SEN). Based on the similarity criteria, a full-scale water model has been established in accordance with the mould of thin-slab caster of the CSP (Compact Strip Production) operation. The effects of SEN structure including outlet area, outflow angle, nozzle width, thick-ness and immersion depth have been studied under high speed casting by measuring the amplitude and the impetus of top waves. By the orthogonal experiment design, not only the influence of the faCtors was estimated, but also the optimum work condition was judged. The rules of the fluid flow phenomena were summarized. The principle for choosing a reasonable structure of SEN was discussed.

关键词： thin-slab casting mould submerged entry nozzle (SEN) water-model

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维普期刊数据库

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Mathematical model of flow characteristic in multi-strand continuous casting tundishes

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Acta Metallurgica Sinica(English Letters) 2009年第4期22卷 297-307页

作者： Hongwei PAN Shusen CHENG School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

In this paper, the subject of mathematical model is a series of math expressions, which is used to calculate different regions＇ volume fraction and analyze flow characterization in multi-strand tundish. But research about mathematical model for multi-strand tundish is few, and so far, there has been no acknowledged math model for multi- strand tundish to describe its flow characteristic. If Sahai＇s model, which is originally proposed for the case of single-strand tundish （proposed in reference, and this model is widely used in the world）, is applied to describe flow feature in multi-strand tundish, the calculation results would be unreasonable. Based on the data of watermodel experiment results, the sum of each strand＇s dead region＇s volume fraction is bigger than 100%, and this obviously doesn＇T agree with reality; and the value of dead region＇s volume fraction is calculated to be minus according to mathematical simulation results data in another case. What＇s more, Sahai＇s model does not propose the standard of plotting the RTD-curve, and this makes scholars around the world can＇t achieve consensus of views about plotting RTD-curve. And the model doesn＇t consider the bypass flow and can＇t calculate its volume fraction, but bypass flow is critical to tundish metallurgy. And through Sahai＇s model, the calculation result of plug flow region＇s volume fraction is also not reasonable, because the model doesn＇t well describe the essence of plug flow. So these suggest that it is not reliable to apply Sahai＇s single-strand tundish model to multi-strand tundish case. Then a new model is attempted to propose in this paper for your discussion. In the new model, the standard of plotting RTD curve is definitely proposed, and relative calculation method is also proposed; and the feature of dead region is carefully studied and the model proposes a new method to calculate its volume fraction, and the calculation formula about its volume fraction can be adjustable according the actu

关键词： Tundish Residual time distribution (RTD) Bypass flow Dead region water-model Mathematical simulation

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维普期刊数据库

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Development of a New Subermerged Entry Nozzle in Thin Slab Caster

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International Journal of Minerals,Metallurgy and Materials 1999年第3期13卷 183-186页

作者： Yanping Bao Jianqiang Zhu Wei Jiang Naiyuan Tian Baomei Xu(Metallurgy School, University of Science & Technology Beijing, Beijing 100083, China) Metallurgy School University of Science and Technology Beijing Beijing 100083 China

The fluid flow in the mould of the thin slab continuous caster has a large intluence on the quality of slabs and its *** fluid flow pattern can be controlled by the SEN (Submerged Entry Nozzle) structure. Traditional SEN can not decrease the surface turbulence and penetration depth at the same time, especially at high casting speed. In order to improve the fluid flow in the mould, a new structure SEN-Dissipation SEN have been invented. The water modeling experiments proved that the dissipation SEN could satisfy, the needs of fluid flow condition in the mould at high casting speed.

关键词： thin slab caster mould dissipation submerged entry nozzle water-model

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