Continuous casting secondary cooling dynamic control method based on online temperature measuring and heat transferring model

Abstract

The invention provides a continuous casting secondary cooling dynamic control method based on an online temperature measuring and heat transferring model. The continuous casting secondary cooling dynamic control method includes constructing a new continuous casting secondary cooling dynamic model, planting the new continuous casting secondary cooling dynamic model into a computer system, embedding the new continuous casting secondary cooling dynamic model into a water distribution system of a continuous casting machine and enabling the new continuous casting secondary cooling dynamic model to be in communication connection with a PLC (programmable logic controller); mounting a non-contact type temperature measuring instrument CQU-2MB in a continuous casting straightening area and enabling the non-contact type temperature measuring instrument CQU-2MB to be in communication connection with the PLC and to form a feedback circuit with the new continuous casting secondary cooling dynamic model; acquiring various technological operation parameters by the new continuous casting secondary cooling dynamic model in an online manner during continuous casting; carrying out simulation computation of parameters in real time; measuring the temperature of the surface of a casting blank in the continuous casting straightening area in an online manner; and controlling and adjusting the quantity of water for continuous casting secondary cooling by comparison and computation for the temperature measured in real time in the online manner, the temperature which is predicted by a heat transferring model and is corrected in real time and the temperature of the surface of a target casting blank. By the continuous casting secondary cooling dynamic control method, accuracy and reliability of continuous casting secondary cooling dynamic control and stability of running of continuous casting secondary cooling are greatly improved, and the method is simple and feasible in implementation and obvious in effect.

Description

technical field [0001] The invention relates to a new dynamic control method for continuous casting secondary cooling based on the combination of continuous casting slab temperature online measurement feedback control and heat transfer mathematical model dynamic control. The method is mainly used in the field of continuous casting of iron and steel materials and other metal materials in the metallurgical industry, and is suitable for the secondary cooling dynamic control of various types of continuous casting machines. [0002] Background technique [0003] With the rapid development of the steel industry, domestic and foreign steel production has reached saturation, and the quality of steel products has become an important goal for the development of the steel industry. The quality of continuous casting slab has an important influence on the production of subsequent products and the quality of final products. The production of high-quality slabs has become the main goal o...

AI Technical Summary

Problems solved by technology

However, this dynamic control method that relies entirely on computer mathematical models still has certain limitations:

[0011] To sum up, whether it is the secondary cooling dynamic control method based on the solidification heat transfer model or the secondary cooling dynamic control method based on the online measurement of the surface temperature of the slab, there are limitations at present, which directly affect the control and quality of the continuous casting slab. improve

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