Control of nonmagnetic particles using a magnetic field

• Main Author: Kazuhiko Iwai, Akbar Eskandarpour, Manabu Usui and Kento Sugiura
• Format: Article
• Language: English
• Published: Taylor & Francis Group 2008-01-01
• Series: Science and Technology of Advanced Materials
• Subjects: schwertmannite; solidification; magnetic fixed bed; Cr removal; refinement of solidified structure
• Online Access: http://www.iop.org/EJ/abstract/1468-6996/9/2/024203

A force and/or torque are induced in a material under the imposition of a magnetic field. Their magnitudes are different from those acting on the surrounding materials because of the difference in their physical properties. Therefore, a magnetic field is a powerful tool for controlling a second phase in a mother phase such as particles suspended in a liquid. In this paper, we focus on two processes. The first one is a novel method of magnetic filtration in which schwertmannite particles in wastewater are controlled using a magnetic field. The second one is a refining process for a metallic alloy structure during solidification in which solid particles suspended in the liquid phase are controlled using the force excited by the simultaneous imposition of a magnetic field and alternating current.