An Influence of EAF Dust Calcining Conditions on Zinc Leaching Efficiency in Ammonium-Chloride Media

Abstract:

An ammonium leaching of electric arc furnace dust (EAFD) was described in this paper. Ural steelmaking plants obtain EAFD of the following chemical composition, %: 23 Zn; 26 Fe; 10 Cl; 2,5 Ca; 2 Mg; 1,2 Pb; 1 Na. The most complete zinc extraction can be achieved with two-stages treatment by calcination of dusts [1], followed by leaching. The effect of calcination temperature (500-1000 °C), calcination time (1-4 hours) and Ca/Fe mass ratio on zinc extraction efficiency in ammonia solutions was studied. The optimal conditions were proposed to extract up to 87% zinc.

• Periodical: Solid State Phenomena (Volume 299)
• Pages: 963-967
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.299.963
• Online since: January 2020
• Authors: Yulia I. Toporkova*, D.A. Prodanova, O.S. Anisimova
• Keywords: Ammonium Leaching, Calcining, Calcium Oxide, Electric Arc Furnace Dusts, Zinc Extraction, Zinc Ferrite

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