B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
B02C4/00—Crushing or disintegrating by roller mills
B02C4/10—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member
B02C4/18—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member in the form of a bar
B02C4/22—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member in the form of a bar specially adapted for milling paste-like material, e.g. paint, chocolate, colloids
Dispositif de fermeture d'une ouverture centrale superieure d'une enceinte et application a une tremie de stockage d'une installation de chargement d'un four a cuve