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Control method for heating power output mode of continuous annealing furnace

A continuous annealing furnace, heating power technology

Active Publication Date: 2018-10-30
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a control method for the heating power output mode of a continuous annealing furnace, which solves the technical problem of the strip temperature fluctuation caused by frequent switching of different heating modes during the production process of multi-standard strip steel in the continuous annealing furnace in the prior art,

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  • Control method for heating power output mode of continuous annealing furnace
  • Control method for heating power output mode of continuous annealing furnace
  • Control method for heating power output mode of continuous annealing furnace

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Embodiment 1

[0023] figure 1 It is a schematic flowchart of a control method for heating power output mode of a continuous annealing furnace in an embodiment of the present invention. Such as figure 1 As shown, the method includes:

[0024] Step 1: Obtain the total column number N of radiant tubes in the heating section of the continuous annealing furnace, and obtain the output power P of the i-th column radiant tubes i , where P i The range is 0≤P i ≤100, the value range of i is 1~N;

[0025] Specifically, the total number of rows of radiant tubes in the heating section of the continuous annealing furnace is N, and the output power of the i-th row of radiant tubes is P i , then the power range of each row of radiant tubes satisfies 0≤P i ≤100, where i ranges from 1 to N. The specification of the strip steel is used as the control quantity of the power output mode, that is, according to the strip steel width w and the strip steel thickness h as the control quantity of the power outp...

Embodiment 2

[0036] A control method of a continuous annealing furnace heating power output mode of the present invention is described in detail below, specifically as follows:

[0037] Taking the 2230 continuous annealing production line of a certain factory as an example, considering the actual parameters of the heating section of the continuous annealing furnace, the total number of radiant tubes is N=31, and according to the actual production data of the production line, the coefficient of influence degree of aspect ratio is determined to be a=2.6, and the aspect ratio benchmark Value b=950, when the PID output power is 90%, then according to the width-thickness ratio of the strip w / h When the width-to-thickness ratio of the strip steel w / h≥950, then

[0038] When w / h=1450, for example w=1450mm, h=1.0mm, such as figure 2 As shown, the heating curve form is similar to the Normal mode;

[0039] When w / h=950, for example w=950mm, h=1.0mm, such as image 3 As shown, the heating curve ...

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Abstract

The invention discloses a control method for a heating power output mode of a continuous annealing furnace and relates to the technical field of cold steel rolling. The control method comprises the steps that the total number N of columns of radiant tubes of the heating section of the continuous annealing furnace is obtained, output power Pi of the i column of radiant tubes is obtained, wherein the range of the Pi is 0<=Pi<=100, and the value range of i is 1-N; according to the width w and thickness h of strip steel, the width-to-thickness ratio w/h of the strip steel is obtained; whetherthe width-to-thickness ratio meets the preset condition is judged; and when the preset condition is met, Pi meets the formula showed in the specifications, wherein P is PID output power, i is the column number of the radiant tubes, a is the influence degree coefficient of the width-to-thickness ratio, b is the width-to-thickness ratio reference value, w is the width of the strip steel, and h is the thickness of the strip steel. The technical effects that the influence of large power fluctuation caused by switching of different heating modes caused by change of specifications of the strip steelis avoided, heating sudden change in the furnace is reduced, and the stable plate passing ability of the strip steel in the continuous annealing furnace is improved are achieved.

Description

technical field [0001] The invention relates to the technical field of cold rolling and steel rolling, in particular to a control method for a heating power output mode of a continuous annealing furnace. Background technique [0002] The continuous annealing furnace is one of the important processes in the post-processing line of cold rolling. The heating section, as the embodiment of the temperature raising efficiency of the annealing furnace, directly affects the quality and efficiency of strip steel annealing. There are three power heating modes in the heating section of a continuous annealing furnace in a factory, namely Normal mode (normal mode), Proportion mode (balanced mode) and Narrow mode (narrow material mode). Normal mode is a mode in which the output power gradually increases according to the radiant tube column, which is mainly used for wider and thinner strip steel; Narrow mode is a mode in which the output power gradually decreases according to the radiant tu...

Claims

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Application Information

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IPC IPC(8): C21D1/26C21D9/56C21D11/00
CPCC21D1/26C21D9/56C21D11/00
Inventor 李洋龙刘顺明文杰王凤琴于孟陈飞王永强林海海令狐克志李金龙昝现亮李宫胤常安王慧
Owner SHOUGANG CORPORATION