Blower beater mill

US4161294A · kind A · utility

Assignee

• Deutsche Babcock Aktiengesellschaft · DE

Inventors

• Friedrich W. Lautenschlager · Düsseldorf, DE
• Hermann Hennecke · Mülheim, DE

Key dates

• Filing date: Dec 19, 1977
• Grant date: Jul 17, 1979
• Expiry date: Dec 19, 1997

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B02C13/288
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A blower beater mill for grinding and drying operations in which a rotor is provided with a beater portion located on the mill shaft and has also a fan impeller. Beater arms of a beater portion are fastened between hub rings of the mill shaft. The shaft is water-cooled along its longitudinal axis. Shaft crests of the hub rings are enclosed by a jacket at a spaced distance therefrom. The jacket is made of individual rings through which the beater arms pass. The width of these rings is slightly larger than the spacing between two adjacent rows of beater arms. The rings, moreover, overlap in the area of cutouts of the beater arms. The rings may have U-shaped profiles with vertical legs inserted together with the beater arms into grooves between the hub rings. The space between two adjacent U-shaped rings and two adjacent beater arms, located within one beater arm row, is covered by sheet metal connected to the rings and the beater arms. The vertical legs of the U-shaped rings extend close to the bottom of the grooves and are penetrated by hub bolts holding the beater arms. The vertical legs, furthermore, may have cutouts at a level above the hub rings. A coolant gas source may be conn…