Hot rolled slab heating control method based on section terminal temperature

A slab heating and control method technology, applied in temperature control, heat treatment process control, manufacturing tools, etc., can solve problems such as unresolved technical problems, and achieve the effect of improving temperature control accuracy

Active Publication Date: 2016-03-09
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technical solution relates to a dynamic control method for the furnace temperature of the hot...

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  • Hot rolled slab heating control method based on section terminal temperature
  • Hot rolled slab heating control method based on section terminal temperature
  • Hot rolled slab heating control method based on section terminal temperature

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Embodiment Construction

[0061] The method for controlling the heating of a hot-rolled slab based on the end-of-stage temperature of the present invention will be further described below based on specific examples, but the specific examples and related descriptions do not constitute improper limitations to the technical solution of the present invention.

[0062] like figure 1 As shown, the heating control is carried out according to the following steps for each slab entering the heating furnace. The heating furnace has three controllable sections: a preheating section, a first heating section and a second heating section:

[0063] (1) Look up the table to obtain the basic target temperature T of the slab at the end of each heating section ′i aim , and at the same time obtain the furnace temperature T of the slab charge ;

[0064] (2) According to experience, it is determined that the correction coefficient λ of the heating furnace for the temperature at the end of the target section is 0.9;

[0...

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Abstract

The present invention discloses a hot rolled slab heating control method based on section terminal temperatures. The method comprises: determining the target section terminal temperature of a slab at each heating sections; predicting the section terminal temperatures of the slab at each heating section by using the standard furnace temperatures and the slab temperature predicting models of each heating section; determining the sensitivity of the slab on the furnace gas temperatures of each heating section in a heating furnace at the section terminal temperatures of each heating section; according to the sensitivity and the deviation between the predicted section terminal temperatures and the target section terminal temperatures of each heating section, determining the furnace gas temperature adjusting amounts of each heating section; according to the furnace gas temperature adjusting amounts of each heating section and the standard furnace temperatures of each heating section, determining the optimal furnace gas temperature setting values of the slab at each heating section; and carrying out homogenized control on the furnace gas temperature in the heating furnace. With the method of the present invention, it can be ensured that the slab achieves the section terminal target temperature, and can further be ensured that the temperature different between the upper surface and the lower surface of the slab is controlled within the predetermined range so as to effectively avoid the product defect and improve the temperature control precision.

Description

technical field [0001] The invention relates to a temperature control method in a metallurgical process, in particular to a temperature control method in a heating furnace. Background technique [0002] In the prior art, the temperature control of the heating furnace is controlled according to the extraction target temperature required by the host computer, and there is no special requirement for the temperature rise of each section in the furnace. When the slab enters the controllable section of the heating furnace, the model will first predict its future remaining heating time in each controllable section, and make a temperature rise prediction based on the current temperature of the slab, the remaining heating time and the standard heating curve, and then according to the predicted The deviation between the temperature and the target extraction temperature is used to calculate the necessary furnace temperature for the currently heated slab, and finally the final set furna...

Claims

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Application Information

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IPC IPC(8): C21D11/00C21D1/34B21B37/74
Inventor 朱健勤荣鸿伟陈永刚董晖高志玲杭志亮
Owner BAOSHAN IRON & STEEL CO LTD
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