Electromagnetic field distribution in two-section slitless mold for soft-contact electromagnetic continuous casting

Abstract

Numerical simulations and orthogonal experiments were used to study the effects of electromagnetic and structural parameters on magnetic distribution in a two-section slitless mold for the SC-EMCC process. The results showed that magnetic flux density decreased as the electrical frequency (f) and the thickness of the mold (d) increased, but it increased as the resistivity of the top half mold (δR), the coil current intensity (l), the length of the top half mold and the location of the coil increased. By dimensionless analysis, the reltive equation among magnetic flux density and the parameters was given as B/(μl/d)=0.058x (δR-l2/ δvd6f3)0.29. Also the level of the initial meniscus should be controlled between the center and the top of the coil to attain better soft-contact effects. The total distribution of the electromagnetic field in the whole system of the two-section slitless mold was obtained. The magnetic flux density on the vertical direction mainly acted on the location of the initial liquid level, and the magnetic flux density was uniform along the circumferential direction but degenerated along the radical direction. © 2009 ISIJ.