Energy input during agglomeration for magnetic separation

  • US 10,799,881 B2
  • Filed: 11/27/2015
  • Issued: 10/13/2020
  • Est. Priority Date: 11/27/2014
  • Status: Active Grant
First Claim
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1. A method for separating particles from a mixture of at least first type particles and second type particles, the method comprising:

  • (A) contacting in a dispersion medium the first type particles and the second type particles with magnet type particles, wherein in the dispersion medium the first type particles agglomerate to the magnet type particles to provide magnetic agglomerates;

    (B) separating the magnetic agglomerates from the second type particles by applying a magnetic field;

    wherein during step (A) an amount of mechanical shear energy of 0.001-10 kWh/m3 is transferred to the dispersion medium, the first type particles, the second type particles and the magnet type particles andwherein the mechanical shear energy is introduced into the dispersion by a stirred vessel, milling aggregates, rotor stator mixing devices, by a turbulent flow of the dispersion through a pipe conveyed by pumps or by gravity, static mixers, and/or counter current flow mixers.

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