Heat treatment device comprising a refractory envelope
AssigneeE.T.I.A.—Evaluation Technologique, Ingenierie Et Applications
InventorsOlivier Lepez, Philippe Sajet
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Abstract
A device for the heat treatment of a product includes a housing, and a conveyor for conveying the product between an inlet of the housing and an outlet of the housing. The conveyor includes a screw which is mounted so as to turn in the housing according to a geometric axis of rotation and comprising an actuator for rotating the screw according to said axis, with ohmic heating of the screw. Accordingly, the housing comprises an envelope consisting of a refractory material through with the screw extends, said envelope being shaped in the form of a tube, the main inner surface of which follows contours of the screw.
Claims12
A device for subjecting a substance to heat treatment, the device comprising:
- an enclosure;
- a conveyor for conveying the substance between an inlet of the enclosure and an outlet of the enclosure, the conveyor comprising a screw mounted to rotate inside the enclosure about an axis of rotation and including an actuator for driving the screw in rotation about said axis, the screw itself not having a rotary shaft;
- Joule effect heating of the screw;
- wherein the enclosure comprises an envelope of refractory material having the screw extending therethrough, said envelope being shaped as a tube having a main inner surface following the outlines of the screw.
Dependencies are inferred from the claim text.