Abstract: In a device for processing bulk materials, for example by mixing, shredding, metering and/or screening, with a container (40) and an implement (30) driven therein about a horizontal axis by an external rotary drive (10), it is proposed as claimed in the invention that, arranged between the container (40) and the rotary drive (10), is a connection unit (20), to which the container (40) is detachably fastened, in which a shaft (33) of the implement (30) is detachably retained and is detachably attached to the rotary drive (10), and in which a labyrinth seal (50) is loosely accommodated for the purpose of sealing the container (40) against the implement shaft (33).