Large Bell Jar Arc Melt Furnace MODEL ABJ - 900
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Large Bell Jar Arc Melt Furnace MODEL ABJ-900 Arc melt furnaces provide a cost saving alternative to resistance or inductance heating furnaces for many applications. Rather than heaters or induction coils, an electric arc is used to heat up and/or melt parts. Our Large Bell Jar Furnace can instantly reach temperatures over 3500ºC, and will cool down to room temperature in minutes. The ABJ-900 arc melt furnace is a large version of our ABJ-338 system. It comes with a larger chamber, larger hearth plate, larger power supply, and can be equipped with three stingers. It is simple to operate, extremely reliable and is economical to run. MRF will provide custom melt cavities in the hearth plate at the customer’s request. The many available options such as load locks, splat rod, crystal growing kit, high vacuum systems, and more make this furnace versatile and adaptable. MRF Model ABJ-900 Bell Jar Arc Melting Furnace specifications: • • • • • • • • • • • • Operating temperature: over 3500ºC. Large Bell Jar hinged loading configuration. 100% 304L grade stainless steel vacuum chamber construction. Copper stinger with tungsten electrode. Custom copper hearth plate 9.0” dia. (230mm dia.) arrangement. Sight window with 4" dia. view port. One illumination port with halogen light. Power Supply: 650 Amp @ 60% Duty Cycle, 55 kVA. Power cables 1.8m, water-cooled. Water safety interlock. Inert gas system with relief valve. Pumping System with roughing pump, vacuum gauge and valve. Common Applications: • • • • Powder melting Creating alloys Metallic buttons Arc Casting Annealing Crucible welding Material densification High purity melts

Major system Components: 1. Furnace Chamber: n The chamber is all 304L grade stainless steel and electro-polished. n The chamber is double-walled for water-cooling to maintain a chamber temperature below 50ºC (120ºF) during normal use. n The chamber is rated for vacuum to 10-6 Torr ( mbar) n Access to the furnace for loading and unloading is through the hinged bell jar cover. n One illumination port with halogen light is provided. n The port for a pumping system is located on the bottom of the chamber. n Clamps are provided to seal the chamber and isolate the chamber atmosphere. Bell jar...

3. Hearth Plate: n The hearth plate is copper and water cooled. n Dimensions: 9.0” (230mm) diameter x .50 inches (13mm) nominal thick. n Custom cavities in the hearth plate are provided at no charge. 4. Inert Gas System : n This furnace system was designed to operate in argon, nitrogen, or non-flammable forming gas. n The gas system, in combination with the vacuum system, provides a fast way to remove all oxygen from the chamber. n The standard positive pressure for operation is .14 kg/cm sq (2 PSIG). n A relief valve and a 30/30 compound gauge (30 PSIG x 30 inches Hg) are located on the...

10. Documentation: Two sets of Installation and Operating Instructions, Component Manuals and Assembly Drawings are included with the equipment - one hard copy, one copy on CD. 11. Options & Accessories • • • Load Lock Splat Rod Crystal Growing Kit Diffusion or Turbo Vacuum System Tri-arc (three stingers) High Frequency Arc-Starter Utilities n Electricity: 55 kVA 230/240/380/460V*, three phase, 50-60 Hz. n Water: 6 GPM flow, inlet temperature 68ºF (20ºC) at 40PSI (3.5 kg/cm2). n Gas: 20 LPM argon, nitrogen or non-flammable forming gas @ 40 PSI (3.5 kg/cm2). * NOTE: Some voltages may not be...