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建立连铸坯凝固传热数学模型,利用现场实测数据对所建模型进行了验证,并对影响铸坯温度和坯壳厚度的拉坯速度、浇注温度、二冷区水量等因素进行了分析。结果表明:模型的计算精度满足实际生产的需要,影响因素中,拉坯速度和二冷区水量对铸坯温度和坯壳厚度的影响最大。因此调节拉速,改善二冷区制度是铸坯生产工艺中的重要操作。
The mathematical model of solidification and heat transfer of continuous casting billet was set up. The established model was validated by field measurement data. Factors influencing casting temperature and thickness of billet, such as casting speed, pouring temperature and secondary cooling water were analyzed. The results show that the calculation accuracy of the model meets the need of actual production. Among the influencing factors, the casting speed and the thickness of the shell have the greatest impact on the billet speed and the amount of water in the second cooling zone. Therefore, adjusting the speed, improve the second cooling zone system is an important operation in the slab production process.