Identification of Fe–Al–Zn dross phase in galvanised zinc bath and its separation by method of alternating magnetic field

Abstract

In this study, the separation of Fe–Al–Zn dross phase from hot dip galvanised zinc bath was conducted by using alternating magnetic field. The compositions of the zinc dross were detected by energy dispersive spectrum. The electrical conductivities were measured by physical properties measurement system. The separation efficiency of the zinc dross in different channels was examined by the quantitative metallographic method. Experimental results show that the zinc dross particles with diameter larger than 5 μm can be separated successfully when the processing parameters can selected appropriately.