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1. (WO2018138405) IMPROVEMENTS IN STIRRED BEAD GRINDING MILLS

Pub. No.:    WO/2018/138405    International Application No.:    PCT/FI2017/050042
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Fri Jan 27 00:59:59 CET 2017
IPC: B02C 17/16
B02C 17/22
Applicants: OUTOTEC (FINLAND) OY
SWISS TOWER MILLS MINERALS AG
Inventors: BELKE, Jeff
HEATH, Alex
JAMIESON, Edward Allan
Title: IMPROVEMENTS IN STIRRED BEAD GRINDING MILLS
Abstract:
A stirred bead grinding mill (1) comprises a substantially cylindrical grinding shell (2, 18) and a central stirring shaft (10) within the grinding shell. The central stirring shaft is provided with axially spaced stirring elements, preferably grinding discs (12), along the central stirring shaft. A replaceable grinding element (80) is provided that comprises an axial support structure (81) arranged to form the outer periphery of the grinding element adapted to fit within the grinding shell, and at least one counter disc (14) arranged to project radially inward from the axial support structure (81) to an extent separating two grinding zones in an axial direction while allowing the central stirring shaft within the grinding shell, wherein at least part of the counter disc (14) and/or the support structure (81) is provided with castellations (25A, 25B).