Disclosed is a bladed grinder (20) for plaster waste, comprising a frame (10) comprising a support for a rotating shaft, comprising a main rotating shaft (30) comprising a plurality of vanes (40) radially attached on the main rotating shaft (30), comprising a system for rotating the main rotating shaft (30), comprising at least one inlet opening (60) for introducing waste comprising plaster, comprising at least one outlet opening for recovering large size waste, comprising, in the lower portion, openings covered with separation grids for filtering the defragmented gypsum, comprising a partially cylindrical cover which covers a continuous surface, characterised in that the cover is divided into at least two removable cover sections (50).

Disclosed is a bladed grinder (20) for plaster waste, comprising a frame (10) comprising a support for a rotating shaft, comprising a main rotating shaft (30) comprising a plurality of vanes (40) radially attached on the main rotating shaft (30), comprising a system for rotating the main rotating shaft (30), comprising at least one inlet opening (60) for introducing waste comprising plaster, comprising at least one outlet opening for recovering large size waste, comprising, in the lower portion, openings covered with separation grids for filtering the defragmented gypsum, comprising a partially cylindrical cover which covers a continuous surface, characterised in that the cover is divided into at least two removable cover sections (50).

A crusher includes an internal combustion engine, a crusher unit and a drive train connecting the internal combustion engine and the crusher unit. The drive train includes a motor coupling, a crusher unit coupling and a motor generator. The motor generator includes a motor rotor and a motor stator. The motor rotor includes a motor generator shaft coupled to both an output end of the motor coupling and an input end of the crusher unit coupling in a rotationally fixed manner. The motor generator has a motor mode of operation in which the motor generator provides mechanical work for driving the crusher unit. The motor generator has a generator mode of operation in which the motor generator is driven by the internal combustion engine to generate electrical power.

A crusher includes an internal combustion engine, a crusher unit and a drive train connecting the internal combustion engine and the crusher unit. The drive train includes a motor coupling, a crusher unit coupling and a motor generator. The motor generator includes a motor rotor and a motor stator. The motor rotor includes a motor generator shaft coupled to both an output end of the motor coupling and an input end of the crusher unit coupling in a rotationally fixed manner. The motor generator has a motor mode of operation in which the motor generator provides mechanical work for driving the crusher unit. The motor generator has a generator mode of operation in which the motor generator is driven by the internal combustion engine to generate electrical power.