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Method used for detecting liquid level of liquid steel and protecting thickness of slag layer of slag liquid in crystallizer

A crystallizer and liquid slag layer technology, applied in the configuration of indicating equipment/measuring equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of inability to monitor the thickness of liquid slag layer in real time and operational uncertainty

Active Publication Date: 2015-03-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These two types of methods have the following defects: one is the uncertainty of the operation, such as how to determine the insertion angle and depth and the residence time after insertion, and the other is that this type of method cannot monitor the thickness of the liquid slag layer in real time

Method used

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  • Method used for detecting liquid level of liquid steel and protecting thickness of slag layer of slag liquid in crystallizer
  • Method used for detecting liquid level of liquid steel and protecting thickness of slag layer of slag liquid in crystallizer
  • Method used for detecting liquid level of liquid steel and protecting thickness of slag layer of slag liquid in crystallizer

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Embodiment 1

[0133] Casting Q235 steel, the casting temperature is 1530°C, the casting speed is 0.53m / min, the crystallizer vibration frequency is 1.67Hz, and the amplitude is 3mm.

[0134] In the process of using the present invention to detect the molten steel level in the crystallizer and the thickness of the mold slag liquid slag layer, four steps are adopted: 1) temperature measurement / collection in the mold wall, 2) inverse calculation of heat flux density, 3) heat flux density spectrum 4) interface identification to determine the position of the liquid steel level and the position of the liquid slag layer, so as to detect the liquid steel level and the thickness of the liquid slag layer.

[0135] step one

[0136] like figure 1 Shown: Along the height direction of the mold wall, two sets of thermocouples are installed in the copper wall of the mold corresponding to the molten steel level and the liquid slag layer, that is, along the height direction of the mold wall, the average te...

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Abstract

The invention relates to a method used for detecting the liquid level of liquid steel and protecting the thickness of a slag layer of slag liquid in a crystallizer and belongs to the technical field of continuous casting of metal. A crystallizer wall inner temperature measuring / collecting module, an anti-inference method calculation heat flow density module, a heat flow density spectral analysis module and an interface recognition module are involved in the method. The modules are connected in series. By means of the function of the modules and information flow exchange among the modules, the position of the liquid steel and the position of the liquid slag layer are determined, and therefore the liquid level of the liquid steel and the thickness of the liquid slag layer are detected. As the new detection principle is adopted, the method has the advantages that radiation pollution is avoided, use is safe and reliable, the maintenance property of equipment is good, labor intensity is low, the method is simple and easy to implement, adjusting is convenient, the response speed is high, the capacity of resisting disturbance is high, and control precision is high. The method has high industrial application value, and the liquid level of the liquid steel and the thickness of the liquid slag layer in the crystallizer can be monitored in real time.

Description

technical field [0001] The invention relates to a method for detecting liquid steel liquid level and mold slag liquid slag layer thickness in a crystallizer; it belongs to the technical field of continuous casting. Background technique [0002] Mold molten steel level and mold slag layer thickness control are important links in the metal continuous casting process and have an important impact on the quality of the slab. Reducing the fluctuation of molten steel level can effectively avoid slag entrainment, make mold slag lubricate evenly and initial billet shell grow uniformly, prevent bonding breakout, and reduce quality defects such as surface cracks, folds and pits. However, if the liquid level is too calm, on the one hand, it is not conducive to the absorption of molten steel inclusions by mold slag, and it will easily lead to "frozen steel" in the liquid steel level. In addition, if the liquid slag layer is too thin, it is easy to cause the billet shell to bond with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/16B22D2/00
CPCB22D2/001B22D2/003B22D11/16
Inventor 王万林周乐君张海辉
Owner CENT SOUTH UNIV
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