Optimization of flow control devices in a single-strand slab continuous casting tundish
Optimization of flow control devices in a single-strand slab continuous casting tundish
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DOI：
10.1007/s12613-011-0436-7
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发表时间：
2011-05
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影响因子：
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通讯作者：
Ning Ding;Y. Bao;Qi-song Sun;Li-feng Wang
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文献类型：
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作者：
Ning Ding;Y. Bao;Qi-song Sun;Li-feng Wang
采用物理模拟的方法对某板坯连铸机控流装置进行了优化，并提出了优化方案。优化后的结晶器结构使钢液的最小停留时间提高了1.4倍，峰值浓缩时间提高了97%，死体积分数降低了72%。利用流体力学软件Fluent建立了转炉内钢水流动的数学模型。得到了优化前后的速度场、浓度场和停留时间分布曲线。实验结果表明，合理配置流量控制装置可以改善换热器内流体的流动特性。工业应用结果表明，采用优化的连铸机结构，铸坯中非金属夹杂物面积比降低了32%。
The optimization of flow control devices in a single-slab continuous casting tundish was carried out by physical modeling, and the optimized scheme was presented. With the optimal tundish configuration, the minimum residence time of liquid steel was increased by 1.4 times, the peak concentration time was increased by 97%, and the dead volume fraction was decreased by 72%. A mathematical model for molten steel in the tundish was established by using the fluid dynamics package Fluent. The velocity field, concentration field, and the residence time distribution (RTD) curves of molten steel flow before and after optimization were obtained. Experimental results showed that the reasonable configuration with flow control devices can improve the fluid flow characteristics in the tundish. The results of industrial application show that the nonmetallic inclusion area ratio in casting slabs is decreased by 32% with the optimal tundish configuration.