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Method for determining furnace-temperature set value of billet heating furnace

A billet heating and setting value technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problem of not considering the measured temperature, etc., and achieve the effect of fully automatic steel burning and meeting the requirements of the rolling process.

Active Publication Date: 2013-11-20
CISDI ENG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not consider the measured temperature after the furnace, and is mainly used in the slab heating furnace

Method used

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  • Method for determining furnace-temperature set value of billet heating furnace
  • Method for determining furnace-temperature set value of billet heating furnace
  • Method for determining furnace-temperature set value of billet heating furnace

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Embodiment Construction

[0028] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.

[0029] The heating furnace in this embodiment heats the continuous casting billet, the size of the billet is 150mm×150mm×11500mm, the length of the heating furnace is 20000mm, and the furnace width is 12700mm. Such as image 3 As shown, the furnace temperature control section includes a preheating section, a heating section and a soaking section, the steel type to be heated is HPB300, and the furnace target temperature is 1050°C.

[0030] A method for determining the furnace temperature setting value of a billet heating furnace, specifically comprising the following steps:

[0031] S1: For each control section, predict the difference between the temperature of the bill...

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Abstract

A method for determining a furnace-temperature set value of a billet heating furnace is disclosed and used to determine the furnace-temperature set value of the heating furnace. The method comprises the following steps: S1, predicting a difference between a current control segment outlet temperature and a theoretical target temperature according to a billet temperature calculating model, taking the difference as an feedforward input parameter of a PID circuit to obtain a feedforward furnace-temperature correction value; S2, obtaining a difference between a billet discharge detection temperature and a billet discharge target temperature by a temperature measuring apparatus at the back of the furnace, taking the difference combined with feedback coefficients of each furnace segments as an feedback input parameter of the PID circuit, to obtain a feedback furnace-temperature correction value; and S3, according to current furnace temperature of each furnace segments, feedforward / feedback furnace temperature correction values and heating / cooling speeds, determining the furnace-temperature set value T(i, t+ delta t) of each furnace segments. According to the method for determining the furnace-temperature set value of the billet heating furnace, anticipatory control on the billet in the furnace and feedback control on the discharge billet are integrated, and the PID circuit is used to determine the furnace-temperature set value of each control segment, so that the inside temperature of the furnace is accurately controlled, and thus the rolling technological requirements are satisfied and automatic steel sintering is realized.

Description

technical field [0001] The invention belongs to the field of metallurgical automation, and in particular relates to a method for determining the furnace temperature setting value of a billet heating furnace. Background technique [0002] The billet heating furnace is an important process of hot rolling production. Its main function is to control the furnace temperature of each control section by controlling and adjusting the flow of gas and air according to the billet input parameters, production conditions and process indicators, so that the billet It is evenly heated in the furnace to reach the rolling temperature required by the process when it is out of the furnace. The furnace temperature setting of each furnace section of the heating furnace is related to the quality of billet heating and the amount of energy consumption. [0003] At present, the furnace temperature control methods of the heating furnace mainly include manual control methods and automatic control meth...

Claims

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Application Information

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IPC IPC(8): C21D9/70C21D11/00
Inventor 何立柯华立陈开张伟彭燕华
Owner CISDI ENG CO LTD
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