Vacuum seal for continuous heat treating furnaces

Details Vacuum seal for continuous heat treating furnaces Vacuum seal for continuous heat treating furnaces

C - Chemistry, Metallurgy

21

D

38/6

C21D 11/00 (2006.01) F27D 99/00 (2010.01) C21D 1/74 (2006.01) F27B 9/04 (2006.01)

Patent

CA 1194693

17 ABSTRACT There is provided a method and apparatus for counteracting the tendency for outside air to be drawn into a continuous heat treating furnace in which a feeder pan extends through the charge end opening. A problem commonly encountered is that the hot gaseous atmosphere within the furnace tends to escape through the charge end opening above the feeder pan, while outside air tends to be drawn into the furnace below the feeder pan. This invention provides a vacuum seal which includes air-withdrawing means located adjacently outside the opening and under the feeder pan, adapted to withdraw sufficient air to counter-balance the tendency for outside air to be drawn into the furnace below the feeder pan.

425170

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