US 11,998,929 B2
Combination of carrier-magnetic-separation and a further separation for mineral processing
Wolfgang Rohde, Ludwigshafen am Rhein (DE); David Johann Gilbert, Villach (AT); Bernhard Schuler, Ludwigshafen am Rhein (DE); Oliver Kuhn, Ludwigshafen am Rhein (DE); and Michael Mentges, Ludwigshafen am Rhein (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/268,160
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Aug. 6, 2019, PCT No. PCT/EP2019/071106
§ 371(c)(1), (2) Date Feb. 12, 2021,
PCT Pub. No. WO2020/035352, PCT Pub. Date Feb. 20, 2020.
Claims priority of application No. 18188665 (EP), filed on Aug. 13, 2018.
Prior Publication US 2021/0316316 A1, Oct. 14, 2021
Int. Cl. B03C 1/30 (2006.01); B03B 9/00 (2006.01); B03C 1/00 (2006.01); B03C 1/01 (2006.01); B03D 1/02 (2006.01)
CPC B03C 1/30 (2013.01) [B03B 9/00 (2013.01); B03C 1/002 (2013.01); B03C 1/01 (2013.01); B03D 1/023 (2013.01); B03C 2201/18 (2013.01)] 17 Claims
 
1. A process for concentrating desired particles comprising a carrier-magnetic-separation comprising the following steps,
a) providing a feedstock which contains the desired particles and an undesired material;
b) adding hydrophobic magnetic particles to the feedstock which results in a loaded feedstock containing agglomerates of the magnetic particles and the desired particles or of the magnetic particles and the undesired material;
c) separating the agglomerates from the loaded feedstock by a separation method which results in isolated agglomerates, where the separation method magnetic separation;
d) breaking up the isolated agglomerates to obtain a suspension comprising the magnetic particles in de-agglomerated form; and
e) separating the magnetic particles from the suspension obtained in step d) by a separation method selected from sorting, electric separation, magnetic separation, screening, classification, gravity concentration, and flotation; and
f) optionally re-introducing the magnetic particles obtained in step e) to step b);
g) provided that at least one separation method of steps c) or e) is a magnetic separation, and where the process comprises at least one further separation before or after the steps a), b), c), d) or e),
wherein the at least one further separation is made before the agglomeration step b),
and where the further separation is selected from the group consisting of sorting, electric separation, screening, classification, gravity concentration, and flotation
wherein the flotation is achieved with
mechanical flotation machines,
pneumatic flotation machines,
hybrid flotation machines,
flotation columns,
reactor/separator flotation machines,
flash flotators,
Hydrofloat separator, or
Stack cells.