Refined heating control method

Abstract

The invention relates to the field of metal heating optimization control methods, in particular to a refined heating control method. According to the technical scheme, the method is characterized by comprising the following steps that the dimension data and chemical composition parameters of steel billet being heated are acquired through a field management system; a steel billet temperature prediction mathematical model is started, the steel billet temperature prediction mathematical model comprises a steel billet internal heat conduction model, a hearth radiation heat exchange model and a hearth convection heat exchange model, and the steel billet temperature is calculated in real time to obtain a model calculation temperature of each point inside the steel billet; according to the real-time temperature of the steel billet in combination with the soaking time process requirements, the heating quality of the steel billet at the current heating system and production rhythm is predicted;and the furnace temperature of each section is automatically adjusted and set according to the predicted heating quality of the steel billet until the heating quality of the steel billet meets the heating process requirement. The method has the advantages that the heating process of the steel billet is finely controlled, and the heating quality of the steel billet and the steel rolling productionefficiency are improved to the maximum extent.

Description

technical field [0001] The invention relates to the field of metal heating optimization control methods, more specifically, it relates to a refined heating control method. Background technique [0002] The continuous heating furnace is an important heating equipment in hot rolling production. With the continuous improvement of the precision requirements of the steel rolling production process, higher requirements are put forward for the heating quality of the discharged billet and the optimization control level of the heating furnace. The L2 level (intelligent) combustion optimization model control system of the heating furnace is an effective means to realize the transformation of the heating furnace from the L1 level extensive combustion control mode to the fine combustion control mode, so as to solve various problems caused by the operators burning steel with experience. Quality and cost issues. [0003] Track the temperature change process of the billet in the furnace t...

AI Technical Summary

Problems solved by technology

The current L1 level heating control method of the billet heating furnace mainly adopts the method of setting a certain fixed furnace temperature system, specifying the heating temperature range of each section of the heating furnace, and then specifying the residence time of the billet at the current furnace temperature. However, this This heating control method cannot know whether the temperature of the steel billet itself and the temperature difference of the cross-section meet the requirements of the steel rolling process. Only the operating experience of the heating worker, the rolling temperature of the rolling mill and the feedback of the rolling current can be used to judge whether the steel billet meets the steel rolling process requirements.

[0005] The above scheme has defects: the operating experience of the heating engineer, this kind of heating control technology with subjective factors, is extremely unstable, which will directly affect the steel rolling production, and easily cause problems such as uneven temperature of the billet section, overheating or underheating

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