Electric Arc Furnace (EAF) dust is a hazardous material, which has to be treated for its content of leachable heavy metals. In metal recovery processes, such as plasma furnace, the gas, which contains metal vapors, is led from hot cyclone to a splash condenser. Dross formation on the surface of zinc bath as well as the surface of droplets made by splasher, often impairs condenser performance. Besides, the content of lead and iron in zinc alloy substantially degrades the final product. A pre-treatment of the EAF dust is suggested to resolve this problem by removing more volatile species, which include alkali halides, lead oxide and cadmium content, from the EAF dust. The process involves evaporation of volatile species at about 900C in a virtually closed system under reduced pressure and condensation of the vapors at a lower temperature.

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