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Magnetic separation. Principle of magnetic separation . Utilized feature: magnetic susceptibility . In vacuum:. B 0 = 0 H. 0 – magnetic permeability of vacuum (4 10 –7 V·s/(A·m) = H/m. H - magnetic field intensity (A/m) B 0 - magnetic induction in vacuum (V·s/m 2 = T).
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Principle of magnetic separation Utilized feature: magnetic susceptibility
In vacuum: B0 = 0 H 0 – magnetic permeability of vacuum (410–7 V·s/(A·m) = H/m H - magnetic field intensity (A/m) B0 - magnetic induction in vacuum (V·s/m2 = T) In any medium (e.g. particle): B = H B = 0(H + M) = B0 + 0M particle input vacuum imput
Vector of magnetic induction B in a particle is difefrent from that of in vacuum. Therefore: = (B – B0)/B0 = ( – 0)/ 0 = 0M/B0 is the volumetric dimensionless magnetic susceptibility MATERIALS + - paramagnetics diamagnetics
Ways of expressing magnetic susceptibility w= / M = w M volume (dimensionless) mass (specific) (cm3/g) molar (cm3/mol) generally:
Paramagnetics -true paramagnetics -antyferromagnetics -ferrimagnetics -ferromagnetics True paramagnetics
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