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Dynamic control method for online cooling control system of medium-thickness steel plate

A technology of cooling control and dynamic control, applied in temperature control and other directions, can solve unconsidered problems

Active Publication Date: 2013-04-24
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method mainly solves the problem of how to optimize the set value, but it does not consider how to dynamically adjust the control amount when there are disturbance factors, such as steel plate slipping, cooling water flow rate changes, and set value deviations, so that the steel plate reaches Final cooling target temperature and uniform temperature distribution over the entire length of the steel plate

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  • Dynamic control method for online cooling control system of medium-thickness steel plate
  • Dynamic control method for online cooling control system of medium-thickness steel plate
  • Dynamic control method for online cooling control system of medium-thickness steel plate

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Embodiment Construction

[0044] The dynamic control method of the on-line cooling control system for medium and thick steel plates according to the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] Such as figure 1 As shown, in this example, the thickness of steel plate G is 20.91mm, the length of steel plate G is 5m, the target start cooling temperature is 780°C, the target final cooling temperature is 520°C, the actual water temperature is 20°C, and the entire cooling zone includes air cooling section A and water cooling section B And the red section C, in which the water cooling section B includes 19 sets of headers, the first 4 sets of headers are powerful jet headers; the last 15 sets of headers are laminar flow cooling headers. The length of the entire cooling zone is the distance between P2 and P4, which is 64m. P is the direction in which the steel plate travels, that is, the conveying direction of the ...

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Abstract

The invention discloses a dynamic control method for an online cooling control system of a medium-thickness steel plate. The method comprises the following steps of: setting a surface temperature set value and a central temperature set value of a medium-thickness steel plate at any position in a cooling area, and storing the set value in an optimizer; measuring the surface temperature value and central temperature value of the medium-thickness steel plate at any position at a k moment in real time by using an observer, transmitting the surface temperature value and the central temperature value to a speed responding module which is connected with an observer, calculating by using the speed responding module to obtain the surface temperature value and the central temperature value of the medium-thickness steel plate at any position at a k+1 moment, comparing the obtained surface temperature value and the central temperature value with the surface temperature set value and the central temperature set value, and calculating the optimized walking speed and optimized walking acceleration of the medium-thickness steel plate from the k moment to the k+1 moment; and obtaining the optimized walking speed and the optimized walking acceleration by using the online cooling control system of the medium-thickness steel plate and applying the optimized walking speed and the optimized walkingacceleration to the medium-thickness steel plate.

Description

technical field [0001] The invention relates to a cooling control method for steel plates after rolling in the field of metallurgy, in particular to a dynamic control method for a cooling control system for medium-thick steel plates after rolling. Background technique [0002] In the field of metallurgy, in order to ensure that the quality of the finished steel plate meets the product specification requirements, it is necessary to control the cooling temperature of the steel plate after rolling by the online cooling control system of the steel plate. The existing on-line cooling control system for medium and thick steel plates cannot detect the real-time data of the temperature change of the steel plate in the cooling zone during the cooling process, so it cannot dynamically control the cooling process according to the real-time temperature change of the steel plate. Lack of dynamic control makes it difficult for the control system to adjust the entire cooling process in rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/74
Inventor 王笑波刘晔罗劼吴扣根
Owner BAOSHAN IRON & STEEL CO LTD
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