|Keywords||electric arc furnace dust, zinc oxide, ammonium carbonate leaching, recycling|
|Abstract||The production of steel in electric arc furnace (EAF) generates a by-product called EAF dusts. These steelmaking flue dusts are classified in most industrialized countries as hazardous residues because the heavy metals contained in them, tend to leach under slightly acidic rainfall conditions. However, and at the same time they contained zinc species which can be used as a source to obtain valuables by-products. The present investigation shows results on the processing of an EAF flue dust using ammonium carbonate solutions. Once zinc is dissolved: together with other impurities (ie cadmium and copper), these are eliminated from the zinc solution via cementation with metallic zinc. The purified zinc solution was evaporated (distilled) until precipitation of a zinc carbonate species, which then was calcined to yield a zinc oxide of high grade. For the unattacked dust residue from the leaching operation, mainly composed of zinc ferrite, several options can be considered: back-recycled to the furnace, further treatment by sodium hydroxide processing or more safely dumped due to its relatively inertness.|
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|Name||Affiliation||Home page||Total pubs|
|Alguacil FJ||Centro Nacional de Investigaciones Metalurgicas (CSIC), Avda. Gregorio del Amo 8, Ciudad Universitaria, 28040 Madrid, Spainfirstname.lastname@example.org||9|
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