US 11,833,523 B2
Fluidized bed opposed jet mill for producing ultrafine particles from feed material of a low bulk density and a process for use thereof
Tobias Fuchs, Neusäß (DE); Michael Müller, Essingen (DE); and Bernhard Renner, Augsburg (DE)
Assigned to HOSOKAWA ALPINE Aktiengesellschaft, Augsburg (DE)
Filed by HOSOKAWA ALPINE Aktiengesellschaft, Augsburg (DE)
Filed on Sep. 30, 2021, as Appl. No. 17/490,106.
Claims priority of application No. 10 2020 006 008.0 (DE), filed on Oct. 1, 2020.
Prior Publication US 2022/0105520 A1, Apr. 7, 2022
Int. Cl. B02C 19/00 (2006.01); B02C 19/06 (2006.01)
CPC B02C 19/068 (2013.01) 12 Claims
OG exemplary drawing
 
1. A fluidized bed opposed jet mill to produce for producing ultrafine particles from a feed material of low bulk density having a housing in vertical design, with a product feed point and a product discharge, with a grinding zone located in a lower area of the housing which has grinding nozzles spaced evenly around a circumference thereof, with jets of the grinding nozzles intersecting at one central point and with a classifying device installed in an upper area of the housing wherein the feed material is dosed as a gas-particle mixture from below into a sump of the fluidized bed opposed jet mill, whereby a deflector hood is fitted above the product feed point and below a level of the grinding nozzles, and the grinding nozzles are configured to be flush with a wall of the grinding zone.