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Control method for low-temperature roller hearth heat treatment furnace steel plate heating

A technology of heat treatment furnace and control method, applied in the direction of heat treatment process control, heat treatment furnace, heat treatment equipment, etc., to reduce manual intervention, improve product quality, and ensure the effect of heat treatment performance

Inactive Publication Date: 2020-10-13
CHONGQING CISDI THERMAL & ENVIRONMENTAL ENG CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The control system and method mainly involve the basic automatic control, and do not involve the heat treatment model control of the roller hearth heat treatment furnace

Method used

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  • Control method for low-temperature roller hearth heat treatment furnace steel plate heating
  • Control method for low-temperature roller hearth heat treatment furnace steel plate heating
  • Control method for low-temperature roller hearth heat treatment furnace steel plate heating

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Embodiment Construction

[0044] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0045] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to a control method for low-temperature roller hearth heat treatment furnace steel plate heating, and belongs to the field of roller hearth heat treatment furnace optimized control. The control method comprises the following steps of 1, establishing a heat transfer model of radiation heat exchange and convection heat exchange, calculating the surface heat flux density of a steel plate, and calculating the real-time temperature of the steel plate in a furnace; 2, judging whether the steel plate reaches the heat treatment target temperature or not, if not, repeatedly carrying out the step 1, and entering the next calculation cycle to judge again; if yes, starting heat preservation, calculating the position of the steel plate in the furnace at the moment, and calculatingthe heat preservation time when the steel plate reaches an outlet of the heat treatment furnace; judging whether the heat preservation time of the steel plate reaching the outlet of the heat treatment furnace meets the process requirement of the shortest heat preservation time or not, if not, adjusting the furnace temperature and / or the roller speed, repeatedly carrying out the step 1 and step 2,and entering the next calculation period to judge again; and if yes, maintaining the current furnace temperature and roller speed. According to the heat transfer characteristic in the furnace, convection heat transfer calculation is added, reasonable modeling is carried out, and model control precision is improved.

Description

technical field [0001] The invention belongs to the field of optimization control of a roller hearth heat treatment furnace, and relates to a control method for heating a steel plate in a low temperature roller hearth heat treatment furnace. Background technique [0002] The roller hearth heat treatment furnace is an important equipment in the heat treatment production line of wide and thick steel plates, and the process control of its temperature is directly related to the final properties of the steel plates. There are two main indicators that affect the performance of the steel plate, one is the holding time of the steel plate, and the other is the uniformity of the temperature of the steel plate. The heating process of the steel plate in the furnace is equivalent to a black box. When the steel plate reaches the heat treatment target temperature and when it starts to keep warm can only be obtained through model calculation. Therefore, the roller hearth heat treatment fur...

Claims

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Application Information

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IPC IPC(8): C21D11/00C21D9/00
CPCC21D11/00C21D9/0081
Inventor 朱伟素董斌冯永生雍海泉郭英罗建枫
Owner CHONGQING CISDI THERMAL & ENVIRONMENTAL ENG CO LTD
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