US 12,138,632 B2
Stirrer mill
Eduard Nater, Uzwil (CH); Achim Sturm, Uzwil (CH); and Andreas Rieche, Uzwil (CH)
Assigned to BÜHLER AG, Uzwil (CH)
Appl. No. 17/754,235
Filed by BÜHLER AG, Uzwil (CH)
PCT Filed Sep. 30, 2020, PCT No. PCT/EP2020/077315
§ 371(c)(1), (2) Date Mar. 28, 2022,
PCT Pub. No. WO2021/063995, PCT Pub. Date Apr. 28, 2021.
Claims priority of application No. 19200882 (EP), filed on Oct. 1, 2019.
Prior Publication US 2022/0371022 A1, Nov. 24, 2022
Int. Cl. B02C 17/16 (2006.01); B02C 17/18 (2006.01)
CPC B02C 17/161 (2013.01) [B02C 17/1855 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A stirrer mill for processing flowable material to be ground, comprising:
a mill container and a milling chamber that is delimited by a container wall of the mill container and is at least partially filled with milling elements, and
a stirrer with a rotor that can rotate during operation about a center and vertically oriented longitudinal axis, and
an inner stator which is arranged within the rotor, and
wherein a ground material discharge channel is formed between the rotor and an outer wall of the inner stator, via which the ground material is guided through a milling element separation unit in the direction of a discharge pipe, wherein a ground material discharge chamber is formed after the milling element separation unit in the flow direction of the ground material,
wherein a unit for reducing the volume of the ground material discharge chamber is arranged in the ground material discharge chamber,
wherein the unit for reducing the volume terminates product-tight with a discharge floor of the stirrer mill and has an overflow height h of the product in the vertical direction, wherein a height H of the milling element separation unit is greater than the overflow height h,
wherein h is greater than or equal to 0.85 H.