Intermediate pressure electron beam furnace

Details Intermediate pressure electron beam furnace Intermediate pressure electron beam furnace

H - Electricity

01

J

H01J 37/305 (2006.01) B22D 11/11 (2006.01) C22B 9/22 (2006.01)

Patent

CA 2044534

Intermediate Pressure Electron Beam Furnace Abstract In the representative embodiment described in the specification, an electron beam furnace (10) has an evacuation system (25) which maintains the interior of the furnace at a pressure in the range from about 50 microns Hg to 300 microns Hg. The relatively high pressure reduces degassing time from a cold start, suppresses volatilization of constituents of metal being refined, and causes volatilized metal to con- dense in powder form on a condensing screen. A vibrator (27) assists in removing the powder from a condensing screen (26). Each electron beam gun (17,19,23) has a series of compartments which are individually evacuated to maintain the pressure in the compartment containing the cathode at a level less than about 1 micron Hg. (Fig. 1)

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