Application of a simple pretreatment in the process of acid leaching of electric arc furnace dust
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Date
2024
Authors
Trifunović, Vanja
Milić, Snežana
Avramović, Ljiljana
Bugarin, Mile
Đorđievski, Stefan
Antonijević, Milan
Radovanović, Milan
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Source
Metals
Volume
14
Issue
4
Abstract
Experimental investigations of the effectiveness of the pretreatment of the acid leaching process of a representative sample of electric arc furnace dust (EAF dust) and characterization of a representative sample were performed. As EAF dust is globally defined as hazardous solid industrial waste, and it contains a high percentage of zinc and other useful components, in this paper, the application of pretreatment will be carried out in order to increase the efficiency of the further process of acid leaching, all with the aim of using EAF dust as a secondary raw material for metal valorization. The pretreatment involved the application of a simple process of leaching the EAF dust sample with distilled water. Under the following defined optimal leaching conditions: time—30 min, ratio of solid to liquid phase—1:10, temperature—ambient, and stirring speed—500 rpm, a reduction in the content of water-soluble components was achieved, namely, 83% Cl, 92% K, 74% Na, 14% Cd, 15% Ca, and 19% F. The application of the pretreatment enables significantly better filtration of the suspension and increases the leaching efficiency of zinc and other useful components in the further process of leaching EAF dust with a sulfuric acid solution, compared with the process of direct acid leaching of EAF dust.
Description
Keywords
pretreatment, EAF dust, water leaching, hazardous waste
Citation
DOI
10.3390/met14040426
Scopus
ISSN
2075-4701
ISBN
License
CC-BY