Plant for the thermal treatment of material and operation process thereof
AssigneeSea Marconi Technologies di Wander Tumiatti S.A.S.
InventorsAndreas Hornung, Henning Bockhorn, Karl Appenzeller, Carlo Maria Roggero, Wander Tumiatti
Life of this patent
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Abstract
The plant for the thermal treatment of material, in particular scrap material, comprises at least a reaction zone within a rotary kiln having the longitudinal axis inclined of an angle in the range 0°±45° with regard to an horizontal plane and provided of first heating means and of at least a rotary screw having second heating means. The screw shaft is hollow and has, at least locally, apertures allowing the flow of gas from and/or into the reaction zone, a plurality of thermally conductive particles being movable within the reaction zone.
Claims44
A plant for the thermal treatment of material, comprising at least one reaction zone within a rotary kiln having a longitudinal axis inclined of an angle in the range 0°+45° with regard to a horizontal plane and provided of first heating means and of at least a rotary screw having second heating means, the screw shaft being hollow and having, at least locally, apertures allowing the flow of gas from and/or into the reaction zone, a plurality of thermally conductive particles being movable within the reaction zone.
A plant for the thermal treatment of material, comprising:
- a rotary kiln having a longitudinal axis inclined at an angle in the range of 0° to ±45° from a horizontal plane, the kiln forming a first reaction zone therein;
- a first heater disposed about at least a portion of the kiln for providing heat to the reaction zone;
- a screw disposed in the kiln and capable of rotary motion relative to the kiln, the screw including a hollow screw shaft and apertures formed in the shaft for enabling gas communication therethrough;
- a second heater in communication with the screw shaft;
- and
- a plurality of thermally conductive particles disposed in the kiln, said particles being movable within the reaction zone by the relative rotary motion of the screw.
A process for thermal treatment of scrap materials, the method comprising the steps of:
- providing a rotary kiln having a kiln wall and a longitudinal axis inclined at an angle in the range of 0° to ±45° from a horizontal plane, the kiln forming a first reaction zone therein;
- a first heater disposed about at least a portion of the kiln for providing heat to the reaction zone;
- a screw disposed in the kiln wall and capable of rotary motion relative to the kiln, the screw including a hollow screw shaft and apertures formed in the shaft for enabling gas communication therethrough;
- a second heater in communication with the screw shaft;
- and a plurality of thermally conductive particles disposed in the kiln, said particles being movable within the reaction zone by the relative rotary motion of the screw;
- feeding scrap materials into the rotary kiln;
- moving the scrap material and particles through the reaction zone in the kiln by relative rotary motion between the screw and the kiln;
- and
- heating an interior portion of the screw with a first heater and heating at least a portion of the reaction zone with a second heater, whereby the scrap materials are thermally treated.
Dependencies are inferred from the claim text.