Bladed grinder for plaster recycling

A bladed grinder (20) for plaster waste, comprising:

• a frame (10) comprising a rotation shaft support for a main rotation shaft (30), the frame serving as a support for elements of the grinder;
• a plurality of blades (40) fastened radially on said main rotation shaft (30);
• a system for rotating the main rotation shaft (30);
• and
• at least one inlet aperture (60) for introducing waste comprising plaster, and at least one outlet aperture located in the frame for recovering waste, the at least one outlet aperture being covered with separation screens for filtering fragmented gypsum particles,
• wherein the frame is configured as a bottom part of the grinder;
• and the frame is covered by a partially cylindrical cover,
• wherein the cover is configured as a top part of the grinder which covers the main rotation shaft and is supported by the frame, and
• wherein the cover is divided into at least two removable cover sections (50) that are fastened to one another along rectilinear edges, and the at least two removable cover sections completely cover a top half of the main rotation shaft and the plurality of blades.