Preheating furnace

Details Preheating furnace Preheating furnace

C - Chemistry, Metallurgy

21

D

38/5

C21D 9/70 (2006.01) C21D 9/00 (2006.01) F27B 9/28 (2006.01) F27B 9/36 (2006.01) F27B 9/06 (2006.01) F27B 9/10 (2006.01) F27B 9/24 (2006.01) F27D 3/00 (2006.01) F27D 3/12 (2006.01) F27D 7/04 (2006.01)

Patent

CA 1088747

ABSTRACT OF THE DISCLOSURE PREHEATING FURNACE There is provided a preheating furnace for preheating extended metal pieces such as ingots, bars or billets of a light metal such as aluminum and its alloys. Within the furnace chamber there is a transportation device for the material to be preheated. Nozzles are arranged laterally of this material and have their openings directed towards the surface thereof. The nozzles are of slot-type and are arranged symmetrically with respect to the material so as to admit circulated hot gas to the material in such a way that warping thereof is prevented. The elongated openings of the nozzles are disposed with their longitudinal extension transversely of the longitudinal axis of the material to be preheated.

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