Magnetic Separation of Inclusions in Molten Metal Using a High Magnetic Field
Norihisa WAKI, Kensuke SASSA, Shigeo ASAI
A new method for separating inclusions from molten metal using a high magnetic field has been proposed. The principle of this method based on a magnetization force has been confirmed in experiments with Al-Si-Mn-Fe, Bi-Mn and Al-Si alloys, in which precipitated particles of intermetallic compounds and silicon imitating inclusions in molten metal were separated.
In order to measure magnetic susceptibility, the Gouy's method has been modified by using a super conducting magnet to work in a high temperature up to 1200°C. The theoretical expression of the magnetization force which is indispensable to evaluate the magnetic susceptibility has been derived. By use of the expression, the magnetic susceptibility of the intermetallic compounds used in the experiment of magnetic separation was measured over the range of liquidous to solidous temperatures.
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