Extensive Analysis of Multi Strand Billet Caster Tundish Using Numerical Technique

• 作者: Biswajit Ghosh Mrityunjay K. Singh Ram Bachchan Kumar Rohit Agarwal Sudhansu Pathak
• 来源期刊: 力学国际期刊(英文)
• 学科: 医学
• 关键词: Continuous CASTING CFD BILLET TUNDISH GRADE Change Modelling Quality Control Fluid Flow Heat Transfer
• 年，卷（期）: 2019,（2）
• 页码范围: 29-51
• 页数: 23页
• 分类号: R73

摘要

Continuous casting of steel involving different grades in the same casting sequence remains a challenge to billet caster operators. The intermixed composition obtained during the grade change does not meet the specification of either grade and must be downgraded. Incorrect identification of this intermixed region may result in non-conforming products reaching the customer. In this study, a numerical model based on CFD (computational fluid dynamics approach) has been developed which predicts the start and end of the intermixed composition and the tonnage to be downgraded under different casting conditions. This model was validated and the results were in good agreement with the actual plant data for a 6-strand billet caster at LD-1 of TATA Steel, India. This model is used to calculate transition tonnage for different scenarios, e.g. when one of the outermost strands is not functional or some combinations are not functional and varying casting speed during operation. Furthermore, impact of different design of baffles on performance of Tundish has been evaluated to find a way to reduce transition or intermixed composition.