Roller press for thermal compaction and thermal briquetting of loose materials

Claim 1

A roller press, for the thermal compaction and briquetting of loose material, having rollers, each said roller comprising a core having a cylindrical outer surface and a shell carried on the core, the shell comprising a plurality of adjacent segments each extending longitudinally of the roller and having longitudinal edges parallel to the axis of the roller and means to detachably secure the ends of said segments to said roller core, said roller core having therein circumferentially-spaced cooling ducts parallel to the axis of rotation of said roller at positions inwardly of the outer surface of sad roller core, said cooling ducts being sealed from communication with said segments, means interconnecting said cooling ducts to form at least one cooling circuit, means defining an inlet and an outlet for the passage through each said coolant circuit of a coolant, and means defining common inlet and outlet connections co-axial with said roller core and respectively communicating with said inlet and outlet means of each said coolant circuit, a plurality of annular plates being provided on end faces of said roller core, said means interconnecting said cooling ducts in part including an internal duct circumferentially extending within said annular plate, said internal duct communicating with at least two adjacently disposed said cooling ducts in the roller core to produce said at least one cooling circuit therein, said segments being removable from said core without disconnecting said at least one cooling circuit.