Abstract
The current work is to investigate the removal of non-metallic inclusions from molten steel using electromagnetic separation under high frequency magnetic fields. A certain amount of aluminum nuggets were added to the molten steel to generate alumina inclusions in the current experiments. A layer of alumina clusters close to the wall of the crucible was observed. Models for the entrapment of inclusions by EM fields were developed, indicating that over 91 pct inclusions were captured within the skin depth (2.31 mm from the wall) and the calculation agreed well with the experimental observation. The fluid flow, solidification of the steel and the motion and entrapment of inclusions were studied by three-dimensional mathematical modeling. The separation mechanism of inclusions from molten steel by EM fields was discussed. Both the experiments and the simulation show that EM separation is a feasible and high-efficient method to remove inclusions from the molten steel.
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