Screw conveyor for loose materials

A plant for conveying loose material comprising a plurality of screw conveyors connected in series, wherein the plant comprises at least a first screw conveyor comprising:

• a tubular casing having a first part which is axially rotatable on command with respect to a second part, said first part being provided with at least one opening through which the loose material can be introduced into the casing;
• a screw, internal of and coaxial to the casing and able to rotate on command about an own axis, for conveying the material in a parallel direction to said own axis of said screw;
• a conveyor device which is solid in rotation with said first part of the casing which conveyor device is able to convey the material towards said at least one opening in said first part of the casing, said conveyor device having a tubular wall external and coaxial to the second part of the casing;
• a jacket between said tubular wall and said second part of the casing, through which the material can pass;
• wherein the tubular wall and the second part of the casing are provided with bearings for supporting the tubular wall during rotation around said second part of the casing;
• wherein the bearings are protected and insulated from the material by seals.