Space–time characteristics of true and false sticker breakouts in mould during continuous casting

ABSTRACT

In order to investigate the space–time characteristics of sticker breakout, the instantaneous heat transfer of mould copper plate was visualised. The spatial characteristics of hot and cold regions of true and false sticker breakouts, such as the area, temperature velocity, and location, were studied and analysed. The results show that the hot region area of sticker breakout is mainly concentrated in 1973 to 7795 pixels. The temperature velocity greater than 1.02°C s^–1 is the necessary condition for sticker breakout. The temperature velocity of the cold region is in the range of −0.57 to −4.22°C s^–1. The gathering location of hot and cold region of true sticker breakouts is concentrated in the range of 46th–64th and 5th–47th, respectively. These parameters were also used to distinguish true and false sticker breakouts. The results show that 98.7% of true and false sticker breakouts can be identified with these parameters.

KEYWORDS:

• Continuous casting
• sticker breakout
• mould
• space–time characteristics

Acknowledgements

We would like to acknowledge financial support from the National Natural Science Foundation of China (51704073/51974056), Science and Technology Development of Jilin Province (20180520065JH), ‘13th Five-Year Plan' Science and Technology Research Project of Jilin Provincial Education Department (JJKH20180419KJ/ JJKH20180427KJ), and Technology Innovation and Development Project of Jilin City (20166013). This project was also given financial support by the Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

We would like to acknowledge financial support from the National Natural Science Foundation of China [51704073/51974056], Science and Technology Development of Jilin Province [20180520065JH], ‘13th Five-Year Plan’ Science and Technology Research Project of Jilin Provincial Education Department [JJKH20180419KJ/JJKH20180427KJ], and Technology Innovation and Development Project of Jilin City [20166013]. This project was also given financial support by the Key Laboratory of Solidification Control and Digital Preparation Technology [Liaoning Province].