Method and apparatus for detaching frozen charge from a tube mill

USRE47077E1 · kind E1 · reissue

Assignee

• ABB Schweiz AG · CH

Inventors

• Robert Keller · Bellaire, US
• Patrick Meier · Wettswil, CH

Key dates

• Filing date: Dec 28, 2015
• Grant date: Oct 9, 2018
• Expiry date: Dec 28, 2035

Classification

• Technology area (CPC —): General

Abstract

A method and associated apparatus for detaching a frozen charge from an inner wall of a grinding pipe of a tube mill such as is used for grinding. The method includes controlling a driving device of the grinding pipe to detach a frozen charge from an inner wall of the grinding pipe, which driving device is operable to apply a driving torque to the grinding pipe. Controlling the driving device includes varying the driving torque applied to the grinding pipe around a predetermined reference level.