Liquid Steel Flow and Interactions with Nonmetallic Phases in the Continuous Casting Tundish Using CFD &amp; Physical Modeling

Eastman, Christopher; Glaws, Peter; Cao, Dongbu

doi:10.1002/9781119274681.ch4

Cited by 2 publications

References 3 publications

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Modeling Research Technique of Nonmetallic Inclusions Distribution in Liquid Steel during Its Flow through the Tundish Water Model

Merder

Warzecha

et al. 2019

steel research int.

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This study shows research results of behaviors of nonmetallic inclusions (NMIs) in a tundish represented by water model. The object under investigation is a two‐strand trough‐type continuous casting tundish operating in one of the Polish steel plants. Hollow glass microspheres with diameters ranging from 10 to 140 μm are used for testing, which represents the NMIs. The distribution process of microspheres is investigated; the qualitative analysis (visualization) and quantitative analysis (using a laser particle counter) of microsphere distribution (movement) are performed. Based on the obtained results, it is found that the analyzed tundish is not of optimal design, in terms of removing small NMIs, as they are conducted in a stream of liquid flowing at the bottom of the tundish, moving directly into nozzles of the tundish. Their movement is caused by the shaped liquid‐flow phenomena in the tundish working space. The test results help to validate a numerical model, which can be used in further studies to redesign the working space of the tundish. The positive result of verification facilitates to obtain a tool for implementing flow optimization in terms of receiving high metallurgical purity of slabs.

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Modeling Research Technique of Nonmetallic Inclusions Distribution in Liquid Steel during Its Flow through the Tundish Water Model

Merder

Warzecha

et al. 2019

steel research int.

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Steel Quality Improvements with Vertical Continuous Casting at Faircrest Steel Plant

Eastman

Glaws

2017

Bearing Steel Technologies: 11th Volume, Advances in Steel Technologies for Rolling Bearings

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The life of a steel bearing component can be strongly influenced by the quality of the bulk material. The shape, surface, and internal structure of the component can be affected by the upstream steelmaking processes. The steel material must positively affect these characteristics through resistance to distortion and superior surface quality and internal cleanness. The TimkenSteel Faircrest jumbo bloom vertical continuous caster was designed to meet these high standards for the production of high-quality bearing steels. Improved segregation symmetry through the implementation of dynamic mechanical soft reduction and controlled cooling has resulted in customer testing to similar levels of finished product distortion as the bottom poured ingot product. The vertical nature of the machine avoids any bending or unbending strains and stresses that are placed on the surface of the curved cast product, and uniform heat extraction is more easily achieved. The straight shape of the strand also provides a greater potential for inclusion removal by flotation without producing any localized inclusion distribution such as an increased inner radius concentration often found in a curved machine cast product. Significant resources were dedicated to developing a unique and robust tundish design through physical and computational modeling efforts. The tundish produces consistent quality characteristics across all three strands and manages steady-state and transitional operational practices while incorporating a sealed inert tundish atmosphere to minimize reoxidation for increased levels of cleanness. The customized features of the machine have led to rapid qualifications from demanding bearing and gear customers using various testing methods, and quality levels have met or exceeded the TimkenSteel quality expectations.

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Liquid Steel Flow and Interactions with Nonmetallic Phases in the Continuous Casting Tundish Using CFD & Physical Modeling

Cited by 2 publications

References 3 publications

Modeling Research Technique of Nonmetallic Inclusions Distribution in Liquid Steel during Its Flow through the Tundish Water Model

Modeling Research Technique of Nonmetallic Inclusions Distribution in Liquid Steel during Its Flow through the Tundish Water Model

Steel Quality Improvements with Vertical Continuous Casting at Faircrest Steel Plant

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