Effects of electromagnetic filed frequency in the range of 5 kHz to 40 kHz on magnetic induction density have been analyzed by carrying out three dimensional numerical simulations on magnetic field in electro-magnetic soft-contact continuous casting mold with the finite element software ANSYS.The results indicate that the magnetic induction density in the region of molten steel in mold can be increased with the increase of electromagnetic field frequency.Whereas

with the frequency more than 20 kHz

the increase of magnetic induction density becomes to be neglected.The frequency change has a little effect on the location of maximum value of magnetic induction density at the surface of billets along the height direction of mold which occurs in about 5-6 mm below the top surface of molten steel.However

the increase of electromagnetic field frequency can enhance the non-uniformity of magnetic induction density along circumference.The optimized value of electromagnetic field frequency is 20 kHz.