The invention discloses a graded
magnetic separation purification method for
zinc powder impurity separation, and relates to the technical field of
zinc powder impurity separation, and the graded
magnetic separation purification method comprises the following steps: constructing an electromagnetic inversion scene of a three-dimensional
particle cloud, and deducing to obtain a complex
impedance spectrum in a micro-scale region; based on the obtained complex
impedance spectrum, an inductive
reactance component and a capacitive
reactance component are extracted, and an
inductance-
capacitance parameter matrix reflecting the electromagnetic characteristics of local
zinc powder particles is constructed; and taking the
inductance-
capacitance parameter matrix as input, executing electromagnetic excitation scanning in a continuous wide frequency range, applying an alternating
magnetic field of a plurality of frequency points, and synchronously recording the unit
energy absorption power density under the corresponding frequency. According to the method, the
resonance risk of the zinc powder particle swarm is quantified by constructing a three-dimensional electromagnetic inversion and
resonance recognition mechanism,
pulse intensity regulation and control are implemented based on the
resonance matching
intensity coefficient, agglomeration is effectively inhibited, the grading and separation efficiency is improved, the stability and control precision of the
magnetic separation process are remarkably enhanced, and continuous and stable preparation of the high-purity zinc powder is achieved.