Fluid flow phenomena in the electromagnetic stirring of continuous casting systems, part 1: the behaviour of a cylindrically shaped laboratory scale installation

1990 ◽  
Vol 61 (10) ◽  
pp. 455-466 ◽  
Author(s):  
Navtej S. Saluja ◽  
Olusegun Johnson Ilegbusi ◽  
Julian Szekely
Keyword(s):  
Fluid Flow ◽  
Continuous Casting ◽  
Laboratory Scale ◽  
Electromagnetic Stirring ◽  
Flow Phenomena

Numerical investigation of in-mold electromagnetic stirring process for fluid flow and solidification

2017 ◽  
Vol 36 (4) ◽  
pp. 1106-1119 ◽  
Author(s):  
Ambrish Maurya ◽  
Pradeep Kumar Jha
Keyword(s):  
Finite Element ◽  
Fluid Flow ◽  
Continuous Casting ◽  
Finite Volume ◽  
Flow Behavior ◽  
Hybrid Approach ◽  
Liquid Core ◽  
Electromagnetic Stirring ◽  
Solid Shell ◽  
Content Type

Purpose The purpose of present investigation is to analyze the in-mold electromagnetic stirring (M-EMS) process and the effect of stirrer frequency on fluid flow and solidification in a continuous casting billet caster mold. Design/methodology/approach A hybrid approach involving finite element and finite volume method has been used for the study. Finite element model is used to calculate time variable magnetic field, which is further coupled with fluid flow and solidification equations for magneto-hydrodynamic analysis with finite volume model. Findings Results show that though superheat given to steel before its entry into the mold is quickly removed, solid shell formation is delayed by the use of M-EMS. Final solid shell thickness, however, is slightly reduced. Increase in frequency is found to increase the magnetic flux density and tangential velocity of liquid steel and decrease in diameter of liquid core. Practical implications The work is of great industrial relevance. The model may be used to design industrial setup of in-mold electromagnetic stirrer and process could be analyzed and optimized numerically. Originality/value The paper evaluates the influence of M-EMS and its frequency on solidification and flow behavior in the continuous casting mold. The iso-surface temperatures from pouring temperature to liquidus temperature inside the mold have been shown. The findings may be useful for the steelmakers to reduce the defect in continuous casting.

Effects of electromagnetic stirring on fluid flow and temperature distribution in billet continuous casting mould and solidification structure of 55SiCr

2017 ◽  
Vol 115 (1) ◽  
pp. 103 ◽  
Author(s):  
Hanghang An ◽  
Yanping Bao ◽  
Min Wang ◽  
Lihua Zhao
Keyword(s):  
Fluid Flow ◽  
Continuous Casting ◽  
Optimal Parameter ◽  
High Carbon Steel ◽  
Mathematic Model ◽  
Optimal Combination ◽  
Electromagnetic Stirring ◽  
Solidification Structure ◽  
Current Intensity ◽  
Cast Billet

The optimal combination of current intensity and frequency of mould electromagnetic stirring (M-EMS) in continuous casting billet was a crucial compromise for improving inner quality of cast billet such as reduction in center segregation and porosity of medium-high carbon steel. In the present study, a decoupled three-dimensional mathematic model of electromagnetic field, fluid flow and heat transfer in continue casting billet mould with EMS has been developed, and the effects of current intensity and frequency on the system were also discussed. In addition, the industrial trials were carried out to investigate the magnetic field characteristics in the mould with M-EMS and the influence of M-EMS on the solidification structure of 55SiCr. According to the calculations and analysis, the optimal combination range of current intensity and frequency was 300–320 A and 3–4 Hz, respectively. The results showed that inner quality in as-cast billet of 55SiCr has been improved significantly with optimal parameter of 320 A and 3 Hz. For instance, central equiaxed zone increased from 19% to 33%, the center carbon segregation ratio decreased from 1.13 to 1.05 as well as center porosity has nearly disappeared.

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