Abstract: The invention is based on the problem of designing an endless sealing ring for the end wall seal of rotary kilns so that it guarantees a high degree of sealing effectiveness with simpler assembly. The most desired features are small tolerances for cross section and diameter. Rotary-kiln end-wall seals according to the invention should exhibit very low wear and tear if possible and have a service life that corresponds to the maintenance intervals of the rotary kiln as much as possible.

Abstract: A ring sealing arrangement for an indirectly heated rotary tubular kiln between a heating tunnel and a rotating tube (20) with several overlapping segments (10), forming a sealing ring, which are pressed by application pressure elements (30) radially against the rotating tube (20). The segments (10) are essentially made of a heat-resistant, light construction sealing material. The sealing ring consists of several flat band-like sections (32), which are connected with one another, especially by springs (34), and form a tightening ring.

Abstract: The invention is based on the problem of designing an endless sealing ring for the end wall seal of rotary kilns so that it guarantees a high degree of sealing effectiveness with simpler assembly. The most desired features are small tolerances for cross section and diameter. Rotary-kiln end-wall seals according to the invention should exhibit very low wear and tear if possible and have a service life that corresponds to the maintenance intervals of the rotary kiln as much as possible.

Abstract: A rotary drum for carrying out chemical processes at elevated temperatures which includes a rolling body arrangement for cleaning the interior of the drum, a stationary feed end for the material to be treated, a mounting device for the rolling body arrangement on the feed end of the rotary drum, and a rotary bearing that allows the rolling body to roll on the inner side of the rotary drum wall and which connects the rolling body to the mounting device. The rotary drum further including an oblong scraping device which is arranged between the mounting device and said rotary bearing. Since the scraping device is mounted on the mounting device, it is able to carry out a pendulum motion in at least one direction, but unable to turn about itself, and the end of the scraping device on the side of the rotary bearing is connected to the rotary bearing in such a way that it is able to carry out a pendulum motion in at least one direction.