The simulation of mould metallurgical behaviour under electromagnetic stirring for vertical large bloom

ABSTRACT

According to the mould electromagnetic stirring of vertical round billet continuous casting, a three-dimensional mathematical model of electromagnetic field was established to study the distribution of magnetic field in the mould. On the centre cross section of agitator, the distribution of magnetic flux density is small in the centre and large in the edge, in the centre longitudinal section, the maximum value of magnetic flux density at the lower edge of the mould. The influence of electromagnetic parameters on the flow field and temperature field in mould was studied. When the section of round billet is 800 mm, the current intensity is 380 A and the current frequency is 3 Hz, and the proportion of equiaxial crystal is up to 43.6%. The central shrinkage hole, central crack and central porosity are all less than grade 1, and there is no white band, the stirring intensity of M-EMS is relatively ideal.

KEYWORDS:

• Vertical continuous casting
• Metallurgical behaviour
• Numerical simulation
• Electromagnetic parameters
• Magnetic field
• Velocity contour
• Temperature distribution
• M-EMS

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors are grateful for the financial support from the National Natural Science Foundation of China [grant numbers 51504130, 51834002]. Partial support was also provided by Special Fund of USTL [grant number 2017HZ01] and USTL Talent Project [grant number 601011507-15].