Abstract: A device and method for maintenance of a grinding mill. The device includes a movable maintenance tool for maintenance inside said grinding mill, and at least one attachment element adapted to be connected to a fixed point (P) in relation to said grinding mill for attaching said device to said fixed point (P).

Abstract: A stirred mill comprises a container for containing grinding media and a material to be ground. The container has a longitudinal axis, and an agitator arranged in said container along said longitudinal axis. A restrictor plate is arranged in said container, extending across said longitudinal axis, and arranged to be positioned on top of the grinding media. A method of simulating a grinding process of a stirred mill of a first height in a stirred mill of a second height is also disclosed, wherein said second height is less than said first height. Further, a method of grinding material in a stirred mill is disclosed.