Recovery of Zinc from Electric Arc Furnace Flue Powders in the Hazardous Waste Class by Using Hydrometallurgical Methods: Current Evaluations
Abstract
While iron ore is used as the primary raw material source in steel production; The secondary raw material source is steel scraps. 80% of steel production in our country is carried out in Electric Arc Furnaces (EAF), where steel scraps are used as raw materials. During steel production at EAF, 14-20 kg of flue dust containing 25-45% Zn is generated per 1 ton of steel, depending on the scrap composition. The flue dust formed is classified as hazardous waste because it contains significant amounts of zinc, iron and lead. Due to the fact that EAF flue dust contains both high amounts of Zn and is classified as hazardous waste, studies on Zn recovery from EAF flue dust have intensified in recent years. For this reason, hydrometallurgical applications for zinc recovery from EAF flue dust have been extensively investigated in recent years. In hydrometallurgical methods, the purpose is to take zinc into solution using acidic or basic solutions and then to gain Zn from the leach solution by solvent extraction or electrolysis. The aim of this study is to examine and compile the studies on Zn recovery from EAF flue dust by hydrometallurgical methods.
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References
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