Heating assembly for a heat treating furnace

Details Heating assembly for a heat treating furnace Heating assembly for a heat treating furnace

C - Chemistry, Metallurgy

21

D

38/21

C21D 1/00 (2006.01) F27D 11/02 (2006.01) H05B 3/64 (2006.01)

Patent

CA 1105254

Abstract of the Disclosure Graphite heating rods are disposed within a radiant tube which contains nitrogen under pressure to prevent oxidation of the rods. The pressure in the tube is sensed and nitrogen is admitted into or exhausted from the tube depending upon whether the pressure drops below or rises above a safe range. Only as much nitrogen is introduced into the tube as is necessary to replenish that which might be lost through normal leakage and thus only a comparatively small quantity of nitrogen is required to protect the graphite rods.

317819

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