| In this paper, the idea of hot-top is leaded in the electromagnetic continuous casting. The hot-top which is added on the mold can reduce the surface fluctuation and stabilize the meniscus. Reducing the height of the mold can weaken the shielding effect of the mold and improve the efficiency of the power. Aim at hot-top electromagnetic continuous casting, simulation and experimental research have been done, the distribution of the magnetic flux density in continuous casting mold was measured and the rational technique parameters were obtained by lots of experiments. The finite element method has been used to numerically simulate the influences on magnetic flux density and the distribution in terms of the height of the mold and the structure of the inductor, the results show that reducing the height of the mold can enhance magnetic flux density in the system, but it isn't obvious, The height of the inductor has measurably effect on the magnetic field. Using the inductor with 20mm height can increase the magnetic flux density to 85 percent than using the inductor with 40mm height. And the simulating results show that hot-top hasn't obvious influence on the magnetic flux density and distribution. Thereby, foundation is supplied to designing the hot-top electromagnetic continuous casting system.According to the experimental and simulation results, a set of hot-top electromagnetic continuous casting system including mold, inductor, cooling water jacket and hot-top has been established. Using this system, the rational technique parameters such as the pouring position, pouring temperature, cooling water strength and the casting speed have been determined by lots of experiments, and an ingot with smooth surface has been obtained. |
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