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Device and method for measuring thickness of molten slag layer of mold flux of continuous casting crystallizer

A technology of continuous casting mold and measuring device, applied in the field of steel making, can solve the problems of large error, inaccurate measurement of single wire method and double wire method, etc., to improve accuracy and efficiency, eliminate human interference factors, reduce The effect of labor intensity

Inactive Publication Date: 2010-03-10
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for measuring the thickness of the mold slag liquid slag layer of a continuous casting mold, to solve the problem of inaccurate measurement and large error by the single-wire method and the double-wire method, and to reduce the labor intensity of the pouring workers. Improve measurement accuracy and efficiency

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  • Device and method for measuring thickness of molten slag layer of mold flux of continuous casting crystallizer
  • Device and method for measuring thickness of molten slag layer of mold flux of continuous casting crystallizer
  • Device and method for measuring thickness of molten slag layer of mold flux of continuous casting crystallizer

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Embodiment Construction

[0018] During the continuous casting production process, the mold slag closest to the molten steel 13 in the crystallizer 14 is melted into liquid slag, forming a molten liquid slag layer 12, and above the liquid slag layer 12 is an unmelted mold slag layer 11; studies have shown that the unmelted Mold slag layer 11 is incompletely melted, the number of ionized ions is small, and the resistance is large, usually reaching hundreds or even several megaohms. The liquid slag layer 12 is completely melted, almost completely ionized, and the resistance is very small, usually several ohms to tens of ohms. ohm, while molten steel 13 is generally regarded as a conductor, with a resistance of a few tenths of ohms; since the resistance between slag layers and between slag and molten steel is different, a conductivity electrode material with very small resistivity can be selected to measure the liquid slag layer. thickness.

[0019] Concrete implementation steps of the present invention a...

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Abstract

The invention belongs to the field of steel-making and relates to a device and a method for measuring the thickness of a molten slag layer of mold flux of a continuous casting crystallizer. The measuring device comprises two conductivity electrodes, a lifting device and a data collecting and recording device. Wherein, the data collecting and recording device comprises a computer and an analog-digital conversion device; and the lifting device consists of a stepping motor 1, a steel cantilever 2, a fixed arm clamping device 3, a moving arm clamping device 4, the conductivity electrodes 5, a support frame 6 and a screw rod 7. The computer reads resistance signals measured by the conductivity electrodes energy 1s and designs a program for determining mutation points during the measurement process, when the group of experiments are completed, the program calculates the thickness value of the molten slag layer according to the time interval delta T between two times of mutation of the resistance value and the initial conditions which are set well in advance, the verification proves that the device has the advantages of accurate measurement and high efficiency and can reduce the labor intensity of workers, increase the safety factor and further improve the slab quality.

Description

technical field [0001] The invention belongs to the field of steelmaking, and relates to a device and method for measuring the thickness of a mold slag liquid slag layer of a continuous casting crystallizer. Background technique [0002] Continuous casting mold powder is a key material necessary for the continuous casting process, and plays a very important and irreplaceable role in the quality of the slab and the continuous casting process. Mold slag mainly plays the following roles in the continuous casting production process: heat insulation and heat preservation; air isolation to prevent secondary oxidation of molten steel; adsorption of molten steel inclusions to purify molten steel; formation of slag film between the mold wall and molten steel solidification shell to reduce casting resistance , prevent the solidification shell from sticking to the crystallizer wall; fill the air gap between the solidification shell and the crystallizer wall, and improve the heat transf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/06
Inventor 张炯明尹娜王伟赵紫峰
Owner UNIV OF SCI & TECH BEIJING
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