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C/VI has manufactured high temperature rotary furnaces for over 35 years. Cemented
carbides and tantalum sintering were more common applications. Today's design is
significantly different than that of the original rotary designs. As one would expect,
the applications for the furnaces are also different.
Front end metal and ceramic powder processes seem to be a good fit for today's rotary
furnaces. The cycle time per segment, relatively heavy loading, flexibility on ramp
and cool down portions and the requirement of both vacuum and positive pressure
atmosphere environments make the rotary furnace an excellent choice in terms of
throughput and economics. Tantalum, molybdenum, chromium and nickel based alloys
are a few of the areas of potential use. Sintering, degassing, passivation and heat treatment
are typical process operations.
The furnace is accessed by top, (or side) via a load lock. A large rotary table supports
loads on all of the furnace sub-sections. The table is lowered, rotates and raised to positively
seal each sub-section in the proper position. Evacuation, partial pressure control atmospheric
pressure control and various combinations are possible.
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