Abstract:Effects of processing variables such as frequency of imposed magnetic field, imposed magnetic flux density, processing time, diameter of inclusions, and value of r₁/δ on the electromagnetic separating(EMS) removal efficiency were analyzed theoretically. The higher the frequency, the wider the range of r₁/δ will be. Removal efficiency reaches the maximum while r₁/δ ranges from 1.5 to 2. And the experimental results on aluminum melt show that higher frequency and magnetic flux density make for higher removal efficiency, matching well with the theoretical results. When f is 15.6kHz, B_e is 0.1T, and imposed time is 10s, more than 80% inclusion particles with 6μm diameter can be removed.

Key words:   alternating electromagnetic field; aluminum melt; inclusion; EMS; removal efficiency