Numerical Simulation Research and Application of Convex Roll for Efficient Soft Reduction of Continuous Casting Slab

Zhou, Qinghai; Yin, Yue; Zhang, Jiongming

doi:10.1007/s11663-022-02663-7

Cited by 8 publications

(4 citation statements)

References 40 publications

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“…Prior research reports [22,[58][59][60] have investigated the dynamic reduction technology from the perspective of numerical simulation and analyzed it by using the solidification heat transfer theory and finite element difference method to establish mathematical model. Moreover, the nail shooting experiment was conducted to explore the solid fraction with regard to the different reduction amount, reduction interval, reduction rate, and other parameters [19,[32][33][34].…”

Section: Research On Reduction Technologymentioning

confidence: 99%

“…The shape of rollers can significantly reduce the crack formation during the continuous casting process, as the convex-shaped roller improves the reduction efficiency and reduces the cracks formation and micro-segregation, which does not require upgrading the equipment, and can also reduce equipment wear. Zhou et al [58] performed the FEM simulation and investigated that the convex roll can increase the deformation at the slab center, which further increases the reduction efficiency up to 15.10 pct. Ma et al [59] investigated the effect of SR on the center macro-segregation during the continuous casting process, and developed a mathematical model that included fluid flow and solute transfer.…”

Section: Numerical Simulation Researchmentioning

confidence: 99%

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Application Status and Development Trend of Continuous Casting Reduction Technology: A Review

Nian

Zhang

et al. 2022

Processes

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Continuous casting is a dominant steelmaking process due to its steady-state nature, enhanced yield of steel production, and low consumption of energy and manpower. However, the production of defect-free cast products is still a big challenge, as the internal defects, including macro-segregation of alloying elements, cracks, and pores, can be easily formed during the solidification process, which seriously deteriorates the microstructure and mechanical properties of the cast products. Therefore, this paper puts forward the common solutions to overcome these problematic issues. The reduction technology can effectively improve the center segregation of the billet, bloom, and slab. The history of the development of the reduction technology is summarized and classified according to the variations in research trend. Furthermore, the basic principles and parameters of reduction technology are described to implement them in the actual production process. This paper compares the similarities and differences between soft reduction (SR) and heavy reduction (HR) technologies with a particular focus on the theoretical research of HR technology and further elaborates the key parameter and equipment problems during implementation of HR. Moreover, this paper also considers the HR technology adopted by Baosteel as a case study, which helped to put forward some viewpoints for the future development of reduction technology.

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Section: Research On Reduction Technologymentioning

confidence: 99%

Section: Numerical Simulation Researchmentioning

confidence: 99%

Application Status and Development Trend of Continuous Casting Reduction Technology: A Review

Nian

Zhang

et al. 2022

Processes

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show abstract

“…The formation mechanisms of center segregation have been investigated by many researchers. [3][4][5][6][7] The low superheat casting, [8][9][10] electromagnetic stirring, [11][12][13][14] and mechanical reduction [15][16][17][18] were proposed to reduce the center segregation defect in the continuous casting. However, the influence of RGD [19,20] on solute redistribution is less studied, even though it is commonly observed in the continuous caster.…”

Section: Introductionmentioning

confidence: 99%

“…As the center solid fraction was higher, the segregation cannot be reduced. Zhou et al [ 18 ] applied the convex roll in the slab continuous casting and indicated the reduction efficiency was increased and the center segregation can be reduced. With a larger reduction amount applied in the later solidification stage, Ogibayashi et al [ 19 ] found the slab quality deteriorated by the one‐piece roll.…”

Section: Introductionmentioning

confidence: 99%

Roll‐Gap Deviation on Centerline Segregation Evolution in Continuous Casting Slab

Jiang

Zhu

Zhang

2023

steel research int.

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Roll‐gap deviation (RGD) is commonly observed in the slab continuous caster, which means the thicknesses of the right and left sides are different. The RGD amounts and positions on the solute redistribution are investigated. In the RGD zone, slab thickness decreases from the left to the right side. Dynamic grid technology is used to consider the mesh deformation in the model. When RGD is set before the solidification end of the slab middle part, the center segregation in the right‐edge part decreases but that in the left‐edge part increases. That is because the solute‐enriched liquid moves from the right to the left side with solid compression. When RGD is set after the slab middle part is solidified, the center segregation in the right‐edge part is deteriorated, while that in the left‐edge part is reduced. This is because the slab right‐edge part is fully solidified in the RGD zone, and the segregation cannot be reduced in the later stage. With the RGD position moving from 15.5 to 18.0 m from the meniscus, the center segregation in the right‐edge part decreases first and then increases, while that in the left‐edge part increases slightly and then declines.

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The Challenge and Progress in Macro- and Micro-modeling and Simulation of Squeeze Casting Process

Ma,

Han,

Sachdev

et al. 2024

Metall Mater Trans A

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Numerical Simulation Research and Application of Convex Roll for Efficient Soft Reduction of Continuous Casting Slab

Cited by 8 publications

References 40 publications

Application Status and Development Trend of Continuous Casting Reduction Technology: A Review

Application Status and Development Trend of Continuous Casting Reduction Technology: A Review

Roll‐Gap Deviation on Centerline Segregation Evolution in Continuous Casting Slab

The Challenge and Progress in Macro- and Micro-modeling and Simulation of Squeeze Casting Process

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