采用自主研发的比色高温监测系统，实时检测板坯表面温度，依据热传导理论建立了加热炉钢坯加热过程的数学模型，采用有限元法对数学模型进行了离散化分析，开发了钢坯内部中心温度随表面加热过程变化的数值模型。根据检测的钢坯表面温度及开发的数值模型实时通过有限元法估算钢坯中心温度，与传统的通过热电偶探测相比精确了0.46%~0.53%；同时根据检测的钢坯表面与中心温差对实时建立温度补偿模型起到辅助作用，同时可以将温度补偿数据实时传递给燃烧优化控制系统，从而建立了基于钢坯表面温差补偿模型的燃烧优化控制，优化调整燃烧工艺，保证了钢坯加热质量，实现了节能降耗和效益提升。%Self-developed colorimetrical high-temperature monitoring system was used to detect the real-time surface temperature of slabs, a mathematical model for slab heating pro-cess in furnace was established based on heat transfer theory and finite element method was used to carry out discretization analysis for the model to develop a numerical model reflecting the change of central temperature inside slabs with the surface heating process. The accuracy of central temperature of slabs assessed through finite element method on the basis of mea-sured surface temperature and developed numerical model increased by 0.46%-0.53% than traditional thermocouple measurement. The difference between surface temperature and central temperature assisted the establishment of temperature compensation model, which transferred temperature compensation data real-time to combustion optimization control system to establish combustion optimization control based on slab surface temperature compensation model, opti-mize and regulate combustion process, ensure slab heating quality and achieve energy saving and economic performance improvement.
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