Bubble Characterization in a Continuous Casting Mold: Comparison and Identification of Image Processing Techniques

Srivastava, A.; Asgarian, Ali; Sengupta, Joydeep; Chattopadhyay, Kinnor

doi:10.1007/s11663-022-02541-2

Cited by 3 publications

(1 citation statement)

References 43 publications

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“…From the first wide slab CC of the Kawasaki Steel Plant in Japan in the 1970s to the present, many scholars have conducted a lot of research and have contributed to the development of wide slab production technology [ 5 , 6 , 7 ]. Kalter et al [ 8 ] studied the effect of the width-to-thickness ratio on the fluctuation of fluid flow in slab molds.…”

Section: Introductionmentioning

confidence: 99%

Fluid Flow in Continuous Casting Mold for Ultra-Wide Slab

Wang

et al. 2023

Materials

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Ultra-wide slabs have a good application market and prospect, but there is still a lack of research on the flow field. To explore the characteristics of its flow field, this study built a 0.5-scale physical model of mold using Perspex. The effect of casting speed on flow field and surface flow speed was investigated by using an ink tracer experiment and contact measurement. There were various flow patterns in the ultra-wide slab mold, and they continue to transform each other. The jet momentum from the nozzle ports was diffused by colliding with the wide face, which lowered its kinetic energy and affected its subsequent diffusion. Compared with the conventional mold, the upper flow intensity of the ultra-wide slab mold was weaker, which made its liquid surface inactive and caused it to produce a flux rim or slag strip. At different casting speeds, the average flow speed distribution of the ultra-wide slab was C-shaped. When it increased from 0.9 to 1.4 m/s, the corresponding maximum average flow speed increased from 0.08 to 0.2 m/s. At the same time, the proportion of the low-flow speed zone at the most active part of the surface also gradually decreased from more than 90% to about 49%.

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Section: Introductionmentioning

confidence: 99%

Fluid Flow in Continuous Casting Mold for Ultra-Wide Slab

Wang

et al. 2023

Materials

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Bubble Characteristics Required for the Complete Removal of Alumina Inclusions from Steel Melts

Guthrie,

Isac

2024

steel research int.

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Gas bubbling can be an effective means to float out alumina inclusions from liquid steel in a ladle. However, large spherical cap bubbles are formed when using porous plugs, as the liquid steel is nonwetting to the porous refractory. These bubbles rise rapidly through the liquid steel, forming a fast‐moving bubble plume, restricting contact times. Sized microbubbles, by contrast, have now been generated in liquid metals by shearing methods, involving linear crossflows to an entering flow of gas, or alternatively by rotational shearing. Combined with these convective shearing forces, local kinetic energy of turbulence can also play an important part in determining final microbubble size distributions. As microbubbles have much smaller rise velocities and present a far greater inclusion capture surface area than those of a single large bubble of the same gross volume, this will allow us to remove sub‐50 μm inclusions from liquid steel. It is expected that this goal will require a redesign of current ladle shrouds.

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