A liner element for lining a vertical grinding mill agitator including one or more primary mounting portions configured to releasably mount the liner to a shaft of the agitator; and one or more secondary mounting portions configured to releasably mount one or more wear members to the liner. A liner segment including the liner element and at least one wear member is also disclosed.

A stirring device has at least one at least substantially metallic stirring blade carrier and a plurality of stirring blades, which are connected to the stirring blade carrier, wherein the stirring blades are at least substantially made of a non-metallic material, wherein the non-metallic material is a ceramic material, wherein the stirring blades are releasably connected to the stirring blade carrier, wherein it is possible to release and/or establish a mechanical, namely a negative-fit and/or positive-fit connection between the stirring blades and the stirring blade carrier in a damage-free and/or non-destructive manner, and wherein the stirring blade carrier comprises at least one recess, which is configured to at least partly accommodate at least one of the stirring blades. The recess comprises at least one partial region implemented in a contiguous fashion if viewed in parallel to a rotational axis of the stirring blade carrier.

A stirring device has at least one at least substantially metallic stirring blade carrier and a plurality of stirring blades, which are connected to the stirring blade carrier, wherein the stirring blades are at least substantially made of a non-metallic material, wherein the non-metallic material is a ceramic material, wherein the stirring blades are releasably connected to the stirring blade carrier, wherein it is possible to release and/or establish a mechanical, namely a negative-fit and/or positive-fit connection between the stirring blades and the stirring blade carrier in a damage-free and/or non-destructive manner, and wherein the stirring blade carrier comprises at least one recess, which is configured to at least partly accommodate at least one of the stirring blades.

The recess comprises at least one partial region implemented in a contiguous fashion if viewed in parallel to a rotational axis of the stirring blade carrier.

An element or impeller includes a main body adapted to be operatively connected to a material processing machine, and a tip removably attached to the main body. The main body includes a first mounting element defining at least one of a protruding boss or a recess formed on a mounting end of the main body, and a through-hole extending through the main body. The through-hole is adapted to receive a fastening means therein. The tip includes a second mounting element defining at least one of a protruding boss or a recess complementary to the first mounting element. The second mounting element is formed on a mounting side of the tip, and is adapted to directly or indirectly engage with the first mounting element. The tip defines a bore extending therein. The bore and the through-hole are aligned (e.g., coaxially) when the tip is attached to the main body.

An element or impeller includes a main body adapted to be operatively connected to a material processing machine, and a tip removably attached to the main body. The main body includes a first mounting element defining at least one of a protruding boss or a recess formed on a mounting end of the main body, and a through-hole extending through the main body. The through-hole is adapted to receive a fastening means therein. The tip includes a second mounting element defining at least one of a protruding boss or a recess complementary to the first mounting element. The second mounting element is formed on a mounting side of the tip, and is adapted to directly or indirectly engage with the first mounting element. The tip defines a bore extending therein. The bore and the through-hole are aligned (e.g., coaxially) when the tip is attached to the main body.

An impeller assembly comprises a main body adapted to be operatively coupled to a material processing machine, a tip removably attached to the main body, and a fastening assembly. The fastening assembly includes a first mounting element moveably arranged within one of the main body or the tip along a first axis, a second mounting element fixed to the other one of the main body or the tip, and a fastener. The fastener is adapted to bias the first mounting element along the first axis between a first position in which the second mounting element is slidably engageable with the first mounting element, and a second position wherein the tip is fixedly secured to the main body.

An impeller assembly comprises a main body adapted to be operatively coupled to a material processing machine, a tip removably attached to the main body, and a fastening assembly. The fastening assembly includes a first mounting element moveably arranged within one of the main body or the tip along a first axis, a second mounting element fixed to the other one of the main body or the tip, and a fastener. The fastener is adapted to bias the first mounting element along the first axis between a first position in which the second mounting element is slidably engageable with the first mounting element, and a second position wherein the tip is fixedly secured to the main body.

A tool for dry mixing and coating of powder mixtures includes a fixing shaft and an approximately disc-shaped element fixed thereto and of a diameter d, having an upper surface, a lower surface and a peripheral surface connecting the upper and lower surfaces. The disc-shaped element has a plurality of grooves extending parallel to the shaft axis. Each groove has two groove walls extending from the peripheral surface to a groove bottom. A tooth is formed between two grooves. In order to provide a tool which is suitable for particularly low contamination dry mixing, dry dispersing and coating of powder mixtures, the disc-shaped element has a base portion and at least one wear element fixed to the base portion, wherein at least one portion of each groove wall, that adjoins the peripheral surface, is formed by the wear element.

A tool for dry mixing and coating of powder mixtures includes a fixing shaft and an approximately disc-shaped element fixed thereto and of a diameter d, having an upper surface, a lower surface and a peripheral surface connecting the upper and lower surfaces. The disc-shaped element has a plurality of grooves extending parallel to the shaft axis. Each groove has two groove walls extending from the peripheral surface to a groove bottom. A tooth is formed between two grooves. In order to provide a tool which is suitable for particularly low contamination dry mixing, dry dispersing and coating of powder mixtures, the disc-shaped element has a base portion and at least one wear element fixed to the base portion, wherein at least one portion of each groove wall, that adjoins the peripheral surface, is formed by the wear element.

A device for mechanical activation of organic and/or inorganic substances and/or substance mixtures in chemical, pharmaceutical, food-related and/or building material-related applications includes a disk-like agitating body for rotationally fixed mounting on an agitator shaft, and at least one impact unit, which has a head region with an activation surface for cooperation with activation bodies, wherein the at least one impact unit is fastened to the disk-like agitating body radially on the outside with respect to an axis of rotation of the disk-like agitating body. An agitator system with the device is also disclosed.