Method of and a plant for preheating and, possibly,...

Details Method of and a plant for preheating and, possibly,... Method of and a plant for preheating and, possibly,...

C - Chemistry, Metallurgy

22

F

164/26, 148/55.5

C22F 1/04 (2006.01) C21D 9/00 (2006.01) F27B 9/02 (2006.01) F27B 9/12 (2006.01) F27D 13/00 (2006.01) F27B 19/04 (2006.01)

Patent

CA 1223509

Abstract of the Disclosure A method of and a plant for preheating and, possibly, heat- treating and subsequently dividing rod-shaped material into slugs A plant for preheating and, possibly, heat-treating bars (2) of aluminum or aluminum alloys and subsequently sever- ing the bars (2) into slugs (10) comprises a furnace (4) for the heat treatment and preheating only, if desired, billet hot shears (7), and a quick preheating furnace (16) connected between the hot shears and the furnace. Upon se- lection of the operating mode of heat treatment of the bars (2), the quick preheating furnace serves as cooling apparatus providing for temperature controlled cooling and corresponding renewed heating to a predetermined billet pressing temperature when the admissible temperature is not reached. When the plant operates alone to preheat the ma- terial, the quick preheating furnace serves as preheating furnace the exhaust gases of which serve to preheat the bars (2) in the furnace (4) through an exhaust gas conduit (19). This plant permits particularly economic and flexible operation, i.e. operation which is easily adaptable to batches of different compositions of alloys or conditions of textures, exact temperature control being achieved to the desired billet pressing temperature. Fig. 2

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