Disclosed herein is a rock mill lifter having in one example: a radially outward surface with a radially inward recess having a radially inward surface which is substantially parallel to; a calculated radially outward lift surface of the lifter at a minimum allowed lift height. The rock mill lifter in one example may further comprise: a circumferential following surface having; a radially inward recess configured to wear to be; substantially parallel to the radially inward surface of the radially inward recess.

An insert for covering one or more selected surfaces of a discharge end assembly including a discharge end wall of a mill shell partially defined by an outer perimeter wall thereof and a number of pulp lifters mounted on the discharge end wall. The insert is formed to cover the selected surfaces to mitigate wear to which the selected surfaces are subjected when the insert is located in a predetermined position relative to the selected surfaces.

The present invention relates to tilting a wet stone grinder of capacity in the 125-300 liter size. Tilting is accomplished by a gear driven, manual or motorized tilting mechanism.

A lifter bar for an open-ended grinding mill that includes an elongated bar structure and at least one groove portion provided in the elongated bar structure. The groove portion is configured to open on the side of the lifter bar facing outwards from the grinding mill volume, when the lifter bar is mounted onto the grinding mill. The groove portion is provided with at least one through hole opening for a mounting member.

A method for making a shell plate that is mountable to a shell of a grinding mill for grinding ore, said shell plate includes a shell plate body having a first portion including a fixing surface for fixing the shell plate body to the shell and a second portion including a wear surface facing toward interior of the grinding mill, said first portion and said second portion forming a continuous shell plate body, the second portion includes polyurethane such that the wear surface is made of polyurethane.

Disclosed herein is a rock mill lifter having in one example: a radially outward surface with a radially inward recess having a radially inward surface which is substantially parallel to; a calculated radially outward lift surface of the lifter at a minimum allowed lifter height. The rock mill lifter in one example may further include: a circumferential following surface having; a radially inward recess configured to wear to be; substantially parallel to the radially inward surface of the radially inward recess.

The invention relates to a shell plate, to a method for making a shell plate and to a grinding mill for ore grinding. The shell plate is mountable to a shell of a grinding mill for grinding ore and includes a shell plate body having a first portion including a fixing surface for fixing the shell plate body to the shell, and a second portion having a wear surface facing toward an interior of the grinding mill. The first portion and the second portion form a continuous shell plate body, and the second portion includes polyurethane such that the wear surface is made of polyurethane.

A grinding mill for pulverizing material includes a platform having an upper surface and defining a recess having a floor, the recess configured to seat a dish in which the material is disposed, and a movable securing frame that is movably connected with the platform, the frame including a lift support having an upper surface that is movable along a path from a first location that is beneath the floor of the recess, through the recess, to a second location that is coplanar with the upper surface of the platform. A motor configured to cause oscillation of the platform and the movable securing frame can be used. A method of using the grinding mill can include placing a dish above a recess defined by an upper surface of a platform, and lowering the frame with respect to the platform, thereby seating the dish within the recess.

A lifter bar, method for making a lifter bar, a method for assembling a lifter bar and a grinding mill for ore grinding is provided. The lifter bar includes a lifter bar body having an outer surface conforming to the outer surface of the lifter bar and a fixing element for connecting the lifter bar to the shell of the grinding mill. The lifter bar body further includes a first portion and a second portion forming a continuous lifter bar body. The fixing element is embedded in the first portion such that it forms part of the fixing surface of the lifter bar. The second portion is made of polyurethane and forms 35-85% of the volume of the lifter bar.

The present invention relates to tilting a wet stone grinder of capacity in the 125-300 liter size. Tilting is accomplished by a gear driven, manual or motorized tiling mechanism.