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Control method of vertical annealing furnace based on band steel switching specifications

A technology of vertical annealing furnace and control method, which is applied in the direction of heat treatment process control, furnace, heat treatment furnace, etc., and can solve the problems of lack of detailed control methods for specification switching

Active Publication Date: 2016-11-16
CHONGQING CISDI THERMAL & ENVIRONMENTAL ENG CO LTD
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  • Abstract
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Problems solved by technology

The above patents lack a detailed control method for specification switching

Method used

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  • Control method of vertical annealing furnace based on band steel switching specifications
  • Control method of vertical annealing furnace based on band steel switching specifications
  • Control method of vertical annealing furnace based on band steel switching specifications

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Embodiment Construction

[0038] The preferred embodiments of the present invention will be described in detail below; 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.

[0039] The continuous annealing furnace generally consists of a preheating section, a heating section, a soaking section, a cooling section, (overaging), and an equalization section. Both the preheating section and the fast cooling section heat and cool the steel strip through the circulation fan, and the heating section and the soaking section are controlled by the power of the radiant tube. In the strip change control, the outlet temperature of the heating section is used For the research object, other sections are easy to adjust because of timely feedback, so the present invention does not describe it.

[0040] Such as Figure 1-3 Shown is a control method of a vertical annealing furnace strip switching specifi...

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Abstract

The invention discloses a control method of a vertical annealing furnace based on band steel switching specifications, belonging to the technical field of automatic control. The control method comprises the following steps: firstly judging whether the types, thickness and target temperature intervals of two kinds of band steel in front of and behind a weld joint are consistent to determine the types of replacing bands by periodically acquiring the specifications of the two kinds of band steel subjected to band replacement and the weld joint location information; then determining the band replacing target temperature according to the types of the replacing bands and computing the band steel velocity set values and radiant tube temperature set values at different stages during band replacing according to combined action of a velocity model and a heat transfer model; finally judging different stages during band replacing according to the weld joint location and giving the band steel velocity set values and radiant tube temperature set values at corresponding stages, thus achieving the aim of stable control. The perfect control method can be formed and is applicable to online band replacing control of the vertical annealing furnace.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and relates to a control method for strip steel switching specifications in a vertical annealing furnace, in particular to a method of combining speed regulation and radiant tube temperature regulation with the heat transfer mechanism in the annealing furnace as the research object On-line automatic control method for strip switching specifications. Background technique [0002] At present, there are many annealing furnaces in China, but there is a certain gap between the control level of annealing furnaces in my country and foreign countries, and the control level of the overall system and individual equipment needs to be further improved. Among them, the requirements for the switching control of strip steel specifications are relatively high. Improper operation will not only easily cause insufficient heating or overheating of the strip steel, resulting in waste strips, but also seriou...

Claims

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Application Information

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IPC IPC(8): C21D11/00C21D1/26C21D9/52
CPCC21D1/26C21D9/52C21D11/00
Inventor 郭英董斌陈君德军朱伟素
Owner CHONGQING CISDI THERMAL & ENVIRONMENTAL ENG CO LTD
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