Electric Arc Fuming Furnace

The zinc condenser wiU produce zinc metal, but also a small quantity of matte and Blue Powder as a mixture of surface-oxidised fine zinc particles as well as zinc/lead oxide dross. Condenser efficiency to metal was around 70 to 80 per cent. Excessive production of Blue Powder and condenser drosses is often a significant problem with these systems. 

Zinc fuming rates in the electric furnace were directly proportional to the power input, with 180 kg of zinc per hour per square metre of furnace area obtained at a power density of 1000 kW/m of furnace area. The zinc level in residual slag could be reduced to less than three per cent and lead to less than 0.2 per cent. Zinc fuming rates for other previous fuming operations using AC submerged arc resistance furnaces range from 10 to 70 kg of zinc per hour per square metre of furnace area. 

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