Abstract: With the mixture of iron particles and carbon powder used instead of the conventional nozzle sand in the electromagnetic steel tapping system, the distribution of temperature field in nozzle upper was simulated for 1, 3?h and in steady state (infinite time) by the FEM software ANSYS. It was found that the temperature of the Fe/C mixture decreases gradually from top to bottom, thus forming a certain temperature gradient. Then, it was verified that the iron particles in the mixture can be melted quickly on certain process parameters so as to make sure that the operation of steel tapping from ladle is successful. How the ladle refractory meets the technological requirements in the electromagnetic steel tapping process was discussed. And the safety of the ladle bottom plate under the action of electromagnetic induction heating was checked via the distribution of temperature field on the plate.