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Processing screws

In addition to pure transportation tasks, EMDE processing screws take on a variety of integrated process-technical tasks such as dosing, mixing, cooling or heating, separating and sieving, stuffing, discharging and washing. These functions can be partly combined with each other.


Heating and cooling screw conveyors for controlling the temperature and drying of bulk materials and sludges are calculated and dimensioned with calculation programmes in accordance with requirements.

Kühlschnecke im Sodabetrieb
Cooling screw conveyor in a soda plant

Function description

A water-glycol mixture normally serves as a cooling medium; heat transfer oil or low-pressure steam and also electrical heating with a cable are used for heating. The liquid media reach the worm shafts and augur wings through one- or two-way sealing heads. The highest possible temperature differences can be achieved along a short stretch in conjunction with temperature control of the screw trough. The guaranteed process parameters can be partly verified by means of corresponding preliminary experiments in the technical centre.

Further application areas for EMDE processing screws are solids/liquids separation, grading and control sifting and drying and thickening.

Product advantages

  • Processes under pressure and vacuum due to their enclosed construction
  • Process stability during permanent operation
  • At highest temperatures in excess of 1,000°C

Application areas

Our processing screws are suitable for dosing, mixing, cooling or heating, separating and sieving, stuffing, discharging and washing. These functions can be partly combined with each other.