The use of Electromagnetic Suspensions in Improving the Dosing Efficiency of Powders

Localized powder feeding requires a controllable flow even for fine or agglomeration-prone materials. This paper presents a vibratory feeder in which magnetic granules are excited by an alternating electromagnetic field and agitate powder near the feeding path. The study reports operating observations across magnetic-granule counts, experimental flow-rate curves versus magnetic induction for WC, Al₂O₃, TiN, and Bro-10, and ten gravimetric measurements for each of six powder materials in a separate repeatability series at one fixed magnetic-field setting and 50 Hz. The six-material results are summarized by their arithmetic mean, sample standard deviation, and coefficient of variation. The measurements characterize prototype operation and repeatability; they do not establish absolute dosing error or a validated theoretical flow law.