Separation of Non-metallic Inclusions from Molten Steel Using High Frequency Electromagnetic Fields
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THE application of electromagnetic (EM) technologies provides a considerable potential to control the fluid flow of the molten steel. In general, two categories of EM have been proposed to improve the quality of the steel: electromagnetic fields stirrers (EMS) and electromagnetic brakes (EMBR).[1–6] The technologies have been used successfully to achieve a better product quality and a higher productivity in the industry. However, only few studies were performed to investigate the motion and removal of inclusions from the molten steel under high frequency EM fields. Removal of non-metallic inclusions from molten metal is critical during the production of high quality metal products. Non-metallic inclusions cause defects in various metals, such as steel, copper, aluminum, and their alloys. Inclusions in steel induce slivers on steel plates, rupture of thin wire during drawing, and short life time of bearing steels.[7] The detrimental effects of non-metallic inclusions are even more acute for high performance steels.[8] Several traditional methods have been used to remove inclusions from molten metals including buoyant floating, sedimentation, filtration, centrifugal separation, and bubble flotation.[9] However, these methods are hardly effective for
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