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Zinc and lead containing steel plant dusts were micro pelletized. The green micro pellets were dried and screened at 3150 um. After screening the mean particle size was 950 um. Two types of dusts were used in the experiments, blast furnace dust and dust from the secondary ventilation system of the BOF. These dusts were treated in the pilot scale melting cyclone. In the melting cyclone the dusts were molten in the presence of reducing gases. These gases were generated by oxy/fuel burners, which were fired sub-stoichiometricaly. De-zincing efficiencies in the range of 75 to 99% were achieved. The zinc accumulated in the wet venturi scrubber dust. The zinc was concentrated 20 to 35 times. The costs of the de-zincing process were evaluated.

Additional information

Authors: MEIER H, Koninklijke Hoogovens NV, IJmuiden (NL)
Bibliographic Reference: EUR 16796 EN (1997) 25pp., FS, ECU 7.00
Availability: Available from the (2)
ISBN: ISBN 92-828-1399-1
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