Breakout prediction method for slab continuous casting mold based on withdrawal resistance

A technology of slab casting resistance and slab continuous casting, which is applied in the field of slab continuous casting crystallizer breakout prediction, can solve the problems of backward theory and application research, difficult measurement of slab resistance, easy to cause false alarms, etc., to improve the purity degree, reducing the dimension of signal features, and reducing the number of false positives

Inactive Publication Date: 2012-02-08
TIANJIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

Due to the complexity and difficulty of measurement of casting resistance, its theoretical and applied research has always lagged behind that of temperature research. At the same time, because it is too sensitive, it is easy to cause false alarms, which limits its use in breakout prediction to a certain extent. application

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  • Breakout prediction method for slab continuous casting mold based on withdrawal resistance
  • Breakout prediction method for slab continuous casting mold based on withdrawal resistance
  • Breakout prediction method for slab continuous casting mold based on withdrawal resistance

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Embodiment Construction

[0028] The specific implementation of the method for slab continuous casting mold breakout prediction based on casting resistance is divided into the following steps:

[0029] IData collection

[0030] Data collection is completed by the selected hydraulic crystallizer vibration device and power meter.

[0031] i) Due to the extremely harsh environment of the billet shell, the interior is hot molten steel, the exterior is mold slag (or liquid or solid or molten state) and water-cooled mold copper plate, making it difficult to directly measure the casting resistance. So use the indirect method of measurement:

[0032] F = 9.545 × ΔP × η f × r

[0033] In the formula, F-drawing resistance (KN); ΔP-vibration motor power difference between drawing and empty vibration (KW); η-mechanical transmis...

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Abstract

The invention relates to a breakout prediction method for a slab continuous casting mold based on withdrawal resistance, belonging to the field of continuous casting link control during the metallurgical process and mainly being used for solving the problem of time lag in the existing breakout prediction method based on temperature. The breakout prediction method comprises the following steps: (1) collecting production data at continuous casting site, and calculating the withdrawal resistance; (2) de-noising a resistance signal, respectively extracting resistance features in the cases of normal and abnormal (breakout and casting powder) continuous casting processes, and then constructing feature vectors; (3) training a resistance signal recognition model by means of the feature vectors and a support vector machine (SVM); and (4) transferring a real-time withdrawal resistance signal into the recognition model so as to judge the production condition of the slab continuous casting mold. The breakout prediction method has the beneficial effects that the breakout situation is judged and predicted based on the withdrawal resistance so as to obviously advance the prediction time, thus being beneficial to preventing breakout accidents, improving the casting blank quality and optimizing continuous casting technological parameters.

Description

technical field [0001] The invention relates to a method for predicting steel breakout of a slab continuous casting crystallizer, in particular to prevent the steel breakout accident in the continuous casting process according to the change of resistance between the mold shell in the crystallizer and the copper plate between the crystallizer during the slab continuous casting process. Background technique [0002] Compared with the traditional steel mold ingot casting method, continuous casting can save the steel mold ingot casting device and the expensive blooming device, and has the advantages of improving product quality and yield, saving energy, and reducing costs. The mold is the core equipment in the continuous casting machine. The shell of the slab is formed and grown in the mold. In the process, if the growth of the primary shell is not good, the thickness is not enough or uneven when it comes out of the mold. , it is difficult to resist the static pressure of the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/18
Inventor 王红君司向飞赵辉岳有军
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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