US 11,833,520 B2
Dry preparation of kaolin in the production of HPA
Emir Mustafi, Erkrath (DE); Joachim Gier-Zucketto, Würselen (DE); Thorsten Schriewer, Ruhr (DE); and Raffael Stastny, Vienna (AT)
Assigned to SMS group GmbH, Düsseldorf (DE)
Appl. No. 17/250,152
Filed by SMS group GmbH, Düsseldorf (DE)
PCT Filed Jun. 11, 2019, PCT No. PCT/EP2019/065154
§ 371(c)(1), (2) Date Dec. 7, 2020,
PCT Pub. No. WO2019/234257, PCT Pub. Date Dec. 12, 2019.
Claims priority of application No. 10 2018 209 210.9 (DE), filed on Jun. 8, 2018; and application No. 10 2019 200 191.2 (DE), filed on Jan. 9, 2019.
Prior Publication US 2021/0260597 A1, Aug. 26, 2021
Int. Cl. B02C 15/00 (2006.01); B02C 23/30 (2006.01); B02C 23/32 (2006.01); C04B 33/04 (2006.01); C04B 35/626 (2006.01)
CPC B02C 15/007 (2013.01) [B02C 23/30 (2013.01); B02C 23/32 (2013.01); C04B 33/04 (2013.01); C04B 35/6261 (2013.01); B02C 2015/002 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for preparation of raw kaolin (R), comprising:
providing a roller milling and separating device (1) which has a milling section (13) and a first separating section (16);
providing the raw kaolin (R) as a material mixture comprising a first fraction (F1) including kaolin and a second fraction (F2) including quartz;
feeding the raw kaolin (R) to the milling section (13);
pulverizing the raw kaolin (R) in the milling section (13) and thereby extracting the first fraction (F1) at least in part from the raw kaolin (R); and
subsequently separating the first fraction (F1) from the second fraction (F2) in the first separating section (16),
wherein the preparation is carried out without production of a suspension of the raw kaolin (R).