US 11,938,490 B2
Magnetic separation
Coleman Murray, Valencia, CA (US); and Tim Tiemann, Valencia, CA (US)
Assigned to FERROLOGIX, INC., Valencia, CA (US)
Filed by FERROLOGIX, INC., Valencia, CA (US)
Filed on Jan. 31, 2022, as Appl. No. 17/589,240.
Claims priority of provisional application 63/145,806, filed on Feb. 4, 2021.
Prior Publication US 2022/0241797 A1, Aug. 4, 2022
Int. Cl. B03C 1/03 (2006.01); B01L 3/00 (2006.01); B01L 3/02 (2006.01); B03C 1/033 (2006.01); B03C 1/23 (2006.01); B03C 1/28 (2006.01); C12N 13/00 (2006.01); G01N 1/40 (2006.01); G01N 15/10 (2006.01); G01N 35/00 (2006.01)
CPC B03C 1/03 (2013.01) [B03C 1/0332 (2013.01); B03C 1/0335 (2013.01); B03C 1/288 (2013.01); C12N 13/00 (2013.01); B03C 2201/18 (2013.01); B03C 2201/22 (2013.01); B03C 2201/26 (2013.01); G01N 2015/1006 (2013.01); G01N 2015/1081 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system for magnetic separation of magnetic bodies comprising:
a substrate;
a plurality of ferromagnetic elements spaced apart in pitch zones on the substrate, with the spacing between adjacent ferromagnetic elements increasing in a direction along a vector of ferromagnetic elements, and the increase in spacing between adjacent ferromagnetic elements is within a range of 10 μm to 100 μm;
a support surface over the ferromagnetic elements;
a magnetic field generator disposed adjacent to the support surface, the magnetic field generator configured to generate a continuously rotating sinusoidal magnetic field;
a channel over the support surface; and
a plurality of extraction gates aligned over the pitch zones, the extraction gates movable to open or close off the channel to separate magnetic or non-magnetic bodies in a plurality of ranges.