Method for tracking temperature of steel billet in heating furnace

Abstract

The invention provides a method for tracking the temperature of a steel billet in a heating furnace, comprising the following steps of (S1) initializing calculating parameters of the heating furnace and the steel billet; (2) dividing calculating segments of the heating furnace; (S3) solving the calculating segments of the heating furnace and starting a timer; (S4) tracking the temperature of the steel billet in the heating furnace; (S5) tracking the position of the steel billet in the heating furnace; and (S6) judging whether the steel billet reaches the temperature tracking period or not, if a temperature tracking is not completed, returning to the step (S3) to continue calculating and if a temperature tracking is completed, finishing the temperature tracking. The method has the advantage that the problem that the temperature tracking of the steel billet is influenced by many factors such as heating furnace production fluctuation, steel grade variation, high cost and the like when adopting a total heat absorption factor method is avoided.

Description

technical field [0001] The invention relates to the technical field of heating furnaces, in particular to the technical field of mathematical model development and automatic control of heating furnaces. Background technique [0002] The heating furnace is an important equipment in hot rolling production, and it is also one of the equipment that consumes a lot of energy in the hot rolling production line. In addition to the rapid upgrading of hot-rolled products and process equipment, and the continuous improvement of high-value-added steel plates for the heating process of the heating furnace, the heating furnace is facing the severe challenge of saving energy and reducing consumption and improving its own control level. [0003] Personnel skilled in the relevant fields have done a lot of research work on the above problems, especially in the development of the mathematical model for the optimal control of the heating furnace. There are mainly two types of tracking and predi...

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Problems solved by technology

[0004] The former puts aside the professional theory of thermal engineering. The quality of the sample directly affects the furnace temperature decision-making and steel temperature forecast, thereby affecting the control effect of the heating furnace. It is obviously impossible to reasonably realize the optimal control of the heating furnace and the purpose of energy saving and consumption reduction when used to guide actual production; The latter completes the prediction of the billet temperature field in the heating furnace through a mathematical model based on the professional theory of thermal engineering, but its key parameter, that is, the overall heat absorption rate of the heating furnace, needs to be obtained through the supporting couple experiment for different steel types and different structures of heating furnaces.

However, due to the impact of many uncertain factors such as test technology, test point distribution and quantity limitation, heating furnace production fluctuation and steel type change, each test will consume a lot of manpower, material resources and financial resources. Production efficiency and economic benefits, it is impossible to carry out the supporting couple experiment many times

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