Comparison between axial and radial melt stirring on purification of industrial aluminum during Ohno Continuous Casting

Fashu, Simbarashe; Khan, Rajwali

doi:10.1016/j.jestch.2016.09.005

Cited by 3 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To avoid the drawback of the DS process, a new process named continuous unidirectional solidification was developed. There are two styles of the continuous unidirectional solidification process, such as the Ohno continuous casting (OCC) 38,39) and the heating-cooling combined mold (HCCM). 40,41) Yang et al 42) have reported that the tensile strength and elongation of the K418 alloy produced by the continuous unidirectional solidification were higher than those of conventional casting ingot.…”

Section: Introductionmentioning

confidence: 99%

Precipitation Behavior of Nitride Inclusions in K418 Alloy under the Continuous Unidirectional Solidification Process

et al. 2021

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Precipitation Behavior of Nitride Inclusions in K418 Alloy under the Continuous Unidirectional Solidification Process

et al. 2021

View full text Add to dashboard Cite

“…The flow field generated by traditional mechanical stirring is mainly radial flow. Due to the strong radial flow and weak axial flow, the particles are easily agglomerated at the bottom of the crucible ( Ref 13,14). The traditional mechanical stirring leads to poor dispersive of flux and large area of dead zone (Ref [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Magnetic-Mechanical Coupled Stirring on the Distribution of B4C Particles in Al-B4C Composites

Zhao

2021

J. of Materi Eng and Perform

View full text Add to dashboard Cite

The Al-B 4 C composites are interestingly used for neutron shielding due to its low weight, high strength, and neutron absorbing. However, during manufacturing process of Al-B 4 C composites, high content of B 4 C which leads to aggregation is main problem, as well as the low content resulting in poor neutron absorbing.To solve these problems, this study tries to improve the stirring systems by applying a magnetic field based on traditional mechanical stirring and changing the number and shape of the blade of impeller to enhance the flow of the turbulent kinetic energy to maximizes molten aluminum stirring effects. Compared to the traditional mechanical stirring, simulation, and experimentation showed magnetic-mechanical coupled stirring has the higher turbulent kinetic energy, and the dead region is greatly reduced. From the numerical investigations and experiments in the present work, an optimal configuration was selected based on the particle distribution in the magnetic-mechanical coupled stirring. When the stirring time is 30-40 min, the Al-31 wt.% B 4 C composites were successfully manufactured and with the B 4 C particles homogeneously distributed in matrix.

show abstract

“…Meanwhile, the simulation of solute distribution also attracts a lot of attention. Fashu and Khan (2016) investigated the solute redistribution behavior under the melt mechanical stirring at different directions during Ohno Continuous Casting through numerical study. They found that stirring in axial direction was more conducive to the attenuation of the solute boundary layer at a flat solid-liquid interface, while longitudinal stirring with higher velocity magnitude was a better choice with a concave interface.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of flow and heat transfer behaviors during direct-chill casting of large-size magnesium alloy billet under pulsed magnetic field

Duan

Yin

Liu

et al. 2020

HFF

View full text Add to dashboard Cite

Purpose The purpose of this paper is to investigate the effect of pulsed magnetic field (PMF) with different duty cycles on the melt flow and heat transfer behaviors during direct-chill (DC) casting of large-size magnesium alloy billet and find the appropriate range of duty cycle. Design/methodology/approach A transient two-dimensional mathematical model coupled electromagnetic field, flow field and thermal field, is conducted to study the melt flow and temperature field under PMF and compared with that under the harmonic magnetic field. Findings The results reveal that melt vibration and fluctuation are generated due to the instantaneous impact of repeated thrust and pull effects of Lorentz force under PMF. The peak of Lorentz force decreases greatly with the increasing duty cycle, but the melt fluctuation region is expanded with higher duty cycle, which accelerates the interior melt velocity and reduces the temperature gradient at the liquid-solid interface. However, PMF with overly high duty cycle has adverse effect on the melt convection and limited influence on the interior melt. A duty cycle of 20% to 50% is a reasonable range. Practical implications This paper can provide guiding significance for the setting of duty cycle parameters on DC casting under PMF. Originality/value There are few reports on the effect of PMF parameters during DC casting with applying PMF, especially for duty cycle, a parameter unique to PMF. The findings will be helpful for applying the external field of PMF on DC casting.

show abstract

Comparison between axial and radial melt stirring on purification of industrial aluminum during Ohno Continuous Casting

Cited by 3 publications

References 25 publications

Precipitation Behavior of Nitride Inclusions in K418 Alloy under the Continuous Unidirectional Solidification Process

Precipitation Behavior of Nitride Inclusions in K418 Alloy under the Continuous Unidirectional Solidification Process

Effect of Magnetic-Mechanical Coupled Stirring on the Distribution of B4C Particles in Al-B4C Composites

Numerical study of flow and heat transfer behaviors during direct-chill casting of large-size magnesium alloy billet under pulsed magnetic field

Contact Info

Product

Resources

About