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Laminar Cooling U-Shape Control System for Hot Rolled Strip

A control system and laminar cooling technology, which is applied in the field of strip steel cooling, can solve problems such as the performance difference between the head and the tail of the strip steel, and achieve the effects of offsetting performance differences, avoiding performance differences, and preventing severe temperature fluctuations

Active Publication Date: 2017-12-05
武汉钢铁有限公司
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  • Abstract
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Problems solved by technology

[0003] However, because the hot-rolled strip is finally stored in the form of steel coils, the head and tail of the strip can be more fully in contact with the air, resulting in a significant difference in performance between the head and tail of the strip and the middle

Method used

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  • Laminar Cooling U-Shape Control System for Hot Rolled Strip
  • Laminar Cooling U-Shape Control System for Hot Rolled Strip
  • Laminar Cooling U-Shape Control System for Hot Rolled Strip

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Embodiment approach

[0041] Specifically, please continue to refer to figure 2 As shown, the present invention is used for the preferred embodiment of the laminar flow cooling U-type control method of hot-rolled strip steel and comprises the following steps:

[0042] Step S1: Judging whether the finishing rolling group F1 is connected. If the finish rolling unit F1 is switched on, it means that the strip is about to enter the finish rolling process, and step S2 is executed. If the finish rolling unit F1 has not been connected, it means that the strip steel has not entered the finish rolling process, and step S1 is continued.

[0043] Step S2: Read model parameters. In order to facilitate equipment transformation and upgrading, in this embodiment, the basic model and the U-shaped cooling model are designed separately. When needing to adopt laminar flow cooling U-type control method of the present invention, read basic model parameter and U-type cooling model parameter simultaneously; When not n...

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Abstract

The invention discloses a laminar flow cooling U type control method used for hot rolling strip steel. According to the method, strip steel is cooled in five sections, wherein the first section is the head part with cooling length of HL1, the cooling temperature of the first section is cooling temperature T1 of the head part; the second section is a head part buffering region with cooling length of HL2, the cooling temperature of the second section is cooling temperature T2 of the head part buffering region; the third section is the middle part with cooling length of ML, the cooling temperature of the third section is coiling temperature CT; the fourth section is a tail buffering region with cooling length of TT1, the cooling temperature of the fourth section is the cooling temperature T3 of the tail buffering region; and the fifth section is a tail part with cooling length of TT2, and the cooling temperature of the fifth section is the cooling temperature T4 of the tail part. The invention also discloses a laminar flow cooling U type control system used for the hot rolling strip steel. The control method and system can effectively eliminate performance differences between the head and tail parts and the middle part of the strip steel.

Description

technical field [0001] The invention relates to strip steel cooling technology, in particular to a U-shaped control method and system for laminar flow cooling of hot-rolled strip steel. Background technique [0002] In the production process of hot-rolled strip steel, in order to further improve product quality and increase economic benefits, and obtain high-quality mechanical properties of hot-rolled strip steel, after the hot-rolled strip steel leaves the last stand finishing mill and before entering the coiler, it needs The steel is cooled rapidly to control the coiling temperature of the strip, which is the set temperature, also called the target coiling temperature. It is generally believed that the coiling temperature control takes the set temperature as the axis, the smaller the fluctuation range, the higher the control accuracy, and the better the control level, and it also requires uniform cooling throughout the entire length of the strip to ensure uniform mechanica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/74
CPCB21B37/74
Inventor 李鹏程彭维纲蔡卫佳傅萧然郑小根张军袁金李传张鹏武李文峰
Owner 武汉钢铁有限公司
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