A handrail drive located at a reversal region of a handrail. The handwheel drive has a motor-gear assembly including an electric motor and a multistage planet gear assembly. The handwheel drive further includes a handrail wheel having a drive region connected with the motor-gear assembly. The drive region and the motor-gear assembly are co-axially located.

A device for crushing and screening bulk materials consists of a vertical impact mill with associated feeder, an air-charged separator, a discharge device for the final product and a conveyor for returning the insufficiently crushed bulk materials fraction to the crushing region. The vertical impact mill and the separator are arranged on a divided drive shaft, which can be coupled if necessary. The separator is arranged below the vertical impact mill and is designed as a distributor plate, possibly with guide blades. The air is introduced laterally or tangentially below the distributor plate. The finished materials fraction is discharged laterally or tangentially above the distributor plate and conveyed to separator (cyclone) which may be connected downstream. The insufficiently crushed bulk materials fractions are discharged through an outlet below the distributor plate in the base region of the separator. The outlet co-operates with the conveying device which returns the bulk materials fractions to the region of the feeder.

A method of and apparatus for decontaminating contaminated soils and similar materials, the method includes (a) drying and comminuting contaminated soil and similar material in a mill through which a flow of hot gases is passed to provide a mixture of solids and gases; (b) introducing the mixture into a cyclone separator where the mixture is separated into gaseous and solid components; (c) thermally treating the solid components in a decontamination zone at a temperature effective to decontaminate at least a portion of the solid components; (d) passing the solid components after thermally treating same in step (c) into a dwell zone configured as a flow-through region; (e) thermally treating the solid components within the dwell zone at a temperature effective to decontaminate at least a portion of the solid components; (f) cooling the solid components after step (e) by transferring same into a cooling region of a cooling line; (g) thermally afterburning gaseous components from at least one of steps (b) and (c) in a burner; (h) cooling and filtering at least a part of the gaseous components from step (g); and (i) discharging the gaseous components from step (h) to the atmosphere.

A method and arrangement for reducing the circulation of salts in a cement kiln in which a raw meal heat exchanger feeds material to the kiln. A partial gas stream charged with harmful substances is removed from the kiln through a bypass conduit. The partial gas stream is subjected to a multi-stage process of removing dust. This process includes passing the partial gas stream through a first dust separating stage, followed by returning an uncooled dust component of the partial gas stream to the kiln and cooling the remaining portion of the partial gas stream. The cooled remaining portion of the partial gas stream is subjected to a further dust separating process, and thereafter passed through a further bypass conduit to a location of the raw meal exchanger, which location has a temperature at approximately the same level as the temperature of the remaining portion of the partial gas stream entering the further bypass conduit following the further dust separating process.

An arrangement for loading and unloading a ship comprises a boom having an upper portion in the form of a continuous box girder attached to a portal. An upper trackway is supported on a forward region of the boom on top of the box girder. A platform is suspended from a rear region of the boom and has a lower trackway mounted thereon. A movable feed head including an associated supply and discharge device and having one end adapted for cooperating with a loading and unloading device in the forward region of the boom is mounted for moving on the upper and lower trackways. A pylon is attached to a top side of the box girder between the ends of the boom, the upper trackway terminating approximately at the pylon. Guide cables are fixed to the boom and supported by the pylon. A drive is disposed on the box girder in the forward region of the boom for displacing the feed head, and struts are arranged for fixing the feed head to the drive.