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控制中间包内钢液的合理流动对夹杂物的排除有重要影响,为此建立了模拟薄板坯连铸中间包钢液流动情况的模型。采用数学和物理模拟的研究方法,研究了不同尺寸和安装位置的控流装置对某钢厂薄板坯连铸中间包流动特性的影响。结果表明:中间包在无流动控制时,存在明显的短路流及较大死区;原使用控流装置其平均停留时间小,死区较大,实验效果并非最佳;通过实验提出的优化方案,使中间包内示踪剂开始响应时间为无控流装置下的2倍多,平均停留时间由264 秒增加到301.4秒,死区由无控流装置的25.54%降低到15.39%,中间包的冶金性能有了明显改进。
Controlling the reasonable flow of molten steel in the tundish has an important influence on the exclusion of inclusions. Therefore, a model for simulating the flow of molten steel in the thin slab continuous casting tundish is established. The effects of flow control devices of different sizes and installation locations on the flow characteristics of a thin slab continuous casting tundish for a steel mill were studied using mathematical and physical simulation methods. The results show that there is obvious short circuit flow and large dead zone in the tundish without flow control. The average dwell time and the dead zone of the original flow control device are small, and the experimental results are not optimal. The optimized scheme , The response time of the tracer in the tundish started more than twice as long as that without the flow control device, the average residence time increased from 264 seconds to 301.4 seconds, and the dead zone decreased from 25.54% to 15.39% without the flow control device. Metallurgical performance has been significantly improved.