Recovery mechanism of the sticking-type breakout during continuous casting of steel

Qian, Huanyan; He, Fei; Xie, Xiangyu; Zhu, Zhenghai; Zhang, Lingying; Zhang, Linlin; Shi, Jiashun

doi:10.1080/03019233.2017.1368956

Cited by 9 publications

(4 citation statements)

References 8 publications

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“…In recent years, the casting speed has been increased with the development of "high-efficiency continuous casting", which requires more stable heat transfer and lubrication in order to avoid some accidents in mould [1][2][3] . As a serious safety accident, sticker breakout not only reduces production efficiency, but also causes some potential safety hazards 4,5) .…”

Section: Introductionmentioning

confidence: 99%

Analysis and Prediction of Sticker Breakout Based on XGBoost Forward Iterative Model

Liu,

Ma,

Wang

et al. 2024

ISIJ Int.

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All 61 sticker breakouts and 183 false sticker breakouts were obtained based on the on-line mould monitoring system during the conventional slab continuous casting. The 16-dimensional temperature characteristics and temperature velocity characteristics of the sticker breakout were extracted. The sticker breakout recognition based on the XGBoost forward iterative model was developed and optimized by the mean square error algorithm. The results show that the prediction probability of the sticker breakout after optimization is in the range of 0.72∼1.00. The smallest output value 0.5 higher than that before optimization. When the threshold is set to 0.65, the optimized XGBoost model can correctly predict all sticker breakouts and has a 99.5% accuracy rate. The XGBoost model has a stronger generalization ability and higher prediction accuracy, which promotes the intelligent production of continuous casting.

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Section: Introductionmentioning

confidence: 99%

Analysis and Prediction of Sticker Breakout Based on XGBoost Forward Iterative Model

Liu,

Ma,

Wang

et al. 2024

ISIJ Int.

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“…If the initially solidified billet shell is not sufficiently strong, the surface defects of the billet increase, leading to model of the thermal resistance of mold flux and the copper plate interface and compared the shape of the slag rim, the slag in the shell/mold gap, and the depth of the solidified meniscus under different coatings. The effect of the thermal resistance of the interface between the slag and copper plate on the initial solidification and heat transfer in the mold was investigated [18][19][20] . It can be seen that although previous research has been done, it has not been possible to deeply explore the mechanism of the influence of the slag rim on the heat transfer of the mold due to the limitations of equipment and algorithms.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Slag Rim on the Heat Transfer Behavior of a Mold

et al. 2023

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To explore the influence of the slag rim on the heat transfer behavior of a mold, a slag rim was extracted from a stainless steel production factory for high-temperature continuous casting simulation experiments. The 2DIHCP (Two-Dimensional Inverse Heat Conduction Problem) twodimensional inverse problem calculation model was used to analyze the heat transfer characteristics in the mold, and the temperature and heat flux distribution of the hot surface of the mold copper wall under different working conditions were investigated. The results showed that under a casting speed of 0.5 Â m/min, vibration frequency of 2 Hz, and amplitude of 10 mm, the seepage flow of the mold flux was 9.314 and 6.326 g with and without the slag rim, respectively, the thickness of the slag film was 2.1 and 1.3 mm, respectively, the temperature of the mold hot surface was 118.24 and 134.83 ℃, respectively, and the maximum heat flux density of the mold was 0.98 and 1.95 MW/m 2 , respectively. Through data comparison, when there is a slag rim, the amount of slag infiltration decreased by 32%, the thickness of the slag film decreased by 38%, the temperature of the hot surface of the mold increased by 14%, the heat flux density increased by 99%, and the internal crystal morphology of the slag film was complete. This indicates that the slag rim affects the heat transfer behavior in the mold by restricting the inflow of the mold flux and affecting the formation of the slag film.

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“…The one-dimensional temperature curve method mainly uses the temperature values of single or multiple thermocouples to establish logical judgment or intelligent models [3][4][5], such as neural networks and clustering analysis [6,7]. Although this method can predict a lot of breakouts, the true sticker breakout is easily missed if the temperature or mould level has a large fluctuation [8][9][10][11][12]. The temperature thermograph is a new method to recognize sticker breakout and the space-time characteristics of breakout are studied by researchers [13,14].…”

Section: Introductionmentioning

confidence: 99%

Recognition of sticker breakout in mould thermograph based on template matching

Liu

Wang

et al. 2022

Ironmaking & Steelmaking

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Breakout is a serious accident during continuous casting. Sticker is the main type of breakout accidents. The propagation behaviour of sticker breakout in mould is the key to recognizing and preventing breakout accident. A visual monitoring system of breakout has been developed to capture sticker characteristics, which usually consist of hot and cold regions. According to the propagation behaviour of sticker breakouts, four templates were selected with a Euclidean distance algorithm, such as typical, long-span, left one-sided and right one-sided templates. Then, the template matching algorithm was applied to identify the true and false sticker breakouts. The results show that 120 cases of true and false stickers can be distinguished. The recognition rate of true sticker is 100%. There is no false sticker to be determined as a true sticker. This method is not only helpful to capture the propagation behaviour characteristics of sticker breakouts in the mould thermograph but also improves the accuracy of breakout prediction.

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Recovery mechanism of the sticking-type breakout during continuous casting of steel

Cited by 9 publications

References 8 publications

Analysis and Prediction of Sticker Breakout Based on XGBoost Forward Iterative Model

Analysis and Prediction of Sticker Breakout Based on XGBoost Forward Iterative Model

Influence of the Slag Rim on the Heat Transfer Behavior of a Mold

Recognition of sticker breakout in mould thermograph based on template matching

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