Screw feeder for supplying raw material to pulp preparation process

摘要

Removable wear-resistant rails (2) are located in at least the narrow end of the screw pipe (1) and they extend completely around the pipe periphery. The side walls (4,6) of adjacent rails lock against each other in the radial direction and the width of each rail is tapered towards the centre of the pipe in at least the rail region lying inside the inner periphery of the pipe.