Full-scale Water Modeling on Flow Field of Continuous Casting Mold

doi:10.19691/j.cnki.1004-4493.2021.02.010

China's Refractories ›› 2021, Vol. 30 ›› Issue (2): 51-54.DOI: 10.19691/j.cnki.1004-4493.2021.02.010

• Original article • Previous Articles

Full-scale Water Modeling on Flow Field of Continuous Casting Mold

Hang YE¹^,^*(), Tianfei MA¹, Gernot HACKL², Jianhua LUO³, Gongjie TAO³

1 RHI Magnesita, Dalian 116600, China
2 RHI Magnesita, Leoben 8700, Austria
3 Ansteel Group, Anshan 114001, China

Online:2021-06-15 Published:2021-06-15
Contact: Hang YE
About author:Ye Hang graduated from Department of Chemistry of Zhengzhou University. In 2013 he finished his master study as the first Chinese graduate in raw materials engineering of Montanuniversität Leoben (Austria) , then he backed to China and worked for Beijing Jinyu Tongda Refractory Technologies Ltd. focusing on the refractory R & D. At the same time, he received his Ph.D degree of material science in University of Science and Technology Beijing. Dr. Ye joined RHI Magnesita in 2019 as the Director of R & D China. Now he is responsible for the flow-control refractory R & D also the supervisor of the Water-model Lab China & East-Asia.

Abstract

Abstract:

In the continuous casting process of aluminum killed steel grades, nozzle clogging is a common problem. Argon is usually injected into the casting channel through stoppers or nozzles to minimize clogs; however, complex two-phase flow regimes appear, and the flow in the mold might deteriorate. This could result in a higher defect rate in the cast product and should be avoided as much as possible. Therefore, it is important to understand the interaction between process conditions and the refractory products used and their impact on the flow pattern in the mold. In this study, a full-scale water model was established to simulate the slab casting process. Three nozzle shapes and three immersion depths were applied to investigate the flow behavior and liquid level fluctuations by the full-scale water model. The relationship between the flow behavior and continuous casting parameters was evaluated. The results provide guidance for the design and production of the refractory nozzle and the operation of the continuous casting plant.

Key words: slab casting, full-scale water model, argon blowing, level fluctuations

Hang YE, Tianfei MA, Gernot HACKL, Jianhua LUO, Gongjie TAO. Full-scale Water Modeling on Flow Field of Continuous Casting Mold[J]. China's Refractories, 2021, 30(2): 51-54.

Figures/Tables 12

Fig. 1 Possible flow patterns in the mold ? RHI Magnesita

Fig. 2 A schematic diagram of the experimental system ? RHI Magnesita

Fig. 3 The three nozzle shapes and the actual nozzles produced via 3D printing ? RHI Magnesita

Fig. 4 A classic nozzle jet flow ? RHI Magnesita

Fig. 5 Sub-meniscus velocity time sequence diagram

Fig. 6 Flow pattern statistics of the different nozzle shapes

Fig. 7 Level wave height measurement via analysis of the flow photographs ? RHI Magnesita

Table 1 Average wave height at left part and right part of the mould

Nozzle	Left average wave height /mm	Right average wave height /mm
MT1	±3.5	±3.3
MT2	±3.2	±3.6
MT3	±2.8	±3.0

Fig. 8 Sub-meniscus velocity time sequence diagram

Fig. 9 Velocity distribution statistics for different nozzle immersion depths

Table 2 Sub-meniscus velocity statistics values

Immersion depth /mm	Average velocity / (m · s ^-1)	Standard deviation / (m · s ^-1)
125	0.17	0.08
150	0.2	0.07
175	0.2	0.07

Fig. 10 Flow photographs for three nozzle immersion depths (Yellow circles show the activity area of the bubbles) ? RHI Magnesita

References 9

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Full-scale Water Modeling on Flow Field of Continuous Casting Mold

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[1]	Gerald NITZL, Xiaohui LIU, Qingxin LIU, Jie SHEN, Yong TANG. New Argon Stopper Technology for Slab Casting [J]. China's Refractories, 2021, 30(2): 41-44.
[2]	Yong TANG*,Gerald NITZL,Gernot HACKL. Novel Stopper Designs to Improve Argon Purging Efficiency in Slab Casting [J]. , 2016, 25(4): 14-17.