According to the invention, there is provided a magnetic wear liner (10) for protecting an underlying metallic surface (12) of a materials handling device from wear or damage during use. The magnetic wear liner includes a substantially rigid base (16) and one or more wear lining tiles (18) disposed on one side of the rigid base. The magnetic wear liner further includes one or more magnet devices (26) engageable with the rigid base such that a selective portion of the wear liner (10) is magnetically attracted to the underlying metallic surface.

Disclosed is a mill liner for a grinding mill, a mill liner coupling, a coupling tool, and a method of removing a mill liner for a grinding mill. The mill liner is arranged to be removably mounted to an interior surface of the grinding mill. The mill liner includes a coupling component that forms part of a coupling to connect the liner to a coupling tool for lifting of the liner. The coupling component being may be accessible via the inner surface or the wear surface. The coupling component may be in the form of at least one cavity.

Disclosed is a mill liner for a grinding mill, a mill liner coupling, a coupling tool, and a method of removing a mill liner for a grinding mill. The mill liner is arranged to be removably mounted to an interior surface of the grinding mill. The mill liner includes a coupling component that forms part of a coupling to connect the liner to a coupling tool for lifting of the liner. The coupling component being may be accessible via the inner surface or the wear surface. The coupling component may be in the form of at least one cavity.

An energy-saving double-bearing vertical grinding mill for dry grinding and shaping, comprising a shell, a permanent magnet variable frequency motor arranged above the shell, a rotating shaft connected with the output end of the permanent magnet variable frequency motor, and a double-spiral rotor arranged on the rotating shaft, wherein a grinding chamber is formed in the shell, wherein an upper bearing and a lower bearing are respectively arranged at top and bottom of the grinding chamber, wherein the upper bearing and the lower bearing are both sleeved on the rotating shaft and are respectively located at upper end and lower end of the rotating shaft, wherein the upper bearing and the lower bearing are both rotatably connected with the rotating shaft, wherein the grinding chamber is filled with a grinding medium.

An energy-saving double-bearing vertical grinding mill for dry grinding and shaping, comprising a shell, a permanent magnet variable frequency motor arranged above the shell, a rotating shaft connected with the output end of the permanent magnet variable frequency motor, and a double-spiral rotor arranged on the rotating shaft, wherein a grinding chamber is formed in the shell, wherein an upper bearing and a lower bearing are respectively arranged at top and bottom of the grinding chamber, wherein the upper bearing and the lower bearing are both sleeved on the rotating shaft and are respectively located at upper end and lower end of the rotating shaft, wherein the upper bearing and the lower bearing are both rotatably connected with the rotating shaft, wherein the grinding chamber is filled with a grinding medium.

A process for comminuting particles of heterogeneous material. The particles of heterogeneous material are fragmented and broken into smaller particle size by breaking them against each other. Heterogeneous material means two or more different solid materials or phases in the same solid. The component materials may have different specific gravity and/or hardness. In the process, a slurry of particles of heterogeneous material is pumped through an agitated mixture of impingement media, wherein the impingement media has a size greater than a size of the particles, wherein adjacent impingement media interact to create impingement zones through which the particles pass and impinge each other to cause the particles to fracture and break into smaller particles. The impingement media may be from 5 to 10 times larger than the particles. The impingement media may be harder than the particles. The heterogeneous material may be coal.

A liner segment (10) for a rotary ore grinding mill (1) is disclosed. The mill has a horizontal mill axis (25), and an interior having a cylindrical liner (6) with a frusto-conical end (8) from which ground ore slurry exits the mill. Each segment includes a part collar (12) which protrudes inwardly into the interior. The collar has a first generally cylindrical surface (13) co-axial with the mill axis and a second flange surface forming a substantially annular flange (14) of greater radius than the cylindrical surface, surrounding an interior end of the cylindrical surface, and being connected to the cylindrical surface. Each segment has a vane (21) extending radially outwardly of the first cylindrical surface and projecting into the interior. The vane impedes the exit from said mill of unground ore particles and grinding media, and permits the exit of the slurry. A method is also disclosed.

A liner segment (10) for a rotary ore grinding mill (1) is disclosed. The mill has a horizontal mill axis (25), and an interior having a cylindrical liner (6) with a frusto-conical end (8) from which ground ore slurry exits the mill. Each segment includes a part collar (12) which protrudes inwardly into the interior. The collar has a first generally cylindrical surface (13) co-axial with the mill axis and a second flange surface forming a substantially annular flange (14) of greater radius than the cylindrical surface, surrounding an interior end of the cylindrical surface, and being connected to the cylindrical surface. Each segment has a vane (21) extending radially outwardly of the first cylindrical surface and projecting into the interior. The vane impedes the exit from said mill of unground ore particles and grinding media, and permits the exit of the slurry. A method is also disclosed.

The invention relates to a system that enables real-time monitoring of wear and tear occurring in rubber liners and lifter bars used in the internal structure of the ore grinding mills employed in the mining sector, in addition to obtaining estimations as to the replacement times of worn parts.

The present disclosure relates to a method for use in installation of a mill liner, the method including (a) retaining a mounting bolt at least partially within a liner opening extending through the mill liner, (b) positioning the mill liner against a mill shell so that the retained mounting bolt is aligned with a mill shell opening extending through the mill shell, (c) selectively coupling an extraction tool to the mounting bolt, the coupling performed by an operator outside of the mill shell, (d) detaching the mounting bolt from the liner using the extraction tool; (e) pulling the mounting bolt through the mill shell opening so that at least a portion of the mounting bolt protrudes outside of the mill shell, and, (e) securing a fastener onto the mounting bolt to thereby attach the mill liner to the mill.