Naslov (eng)

Hydrometallurgical treatment of electric arc furnace dust in aim of zinc separation

Autor

Trifunović, Vanja
Avramović, Ljiljana
Jonović, Radojka
Milić, Snežana
Đorđievski, Stefan
Jonović, Marko

Opis (eng)

Abstract During the steel production from secondary raw materials in the electric arc furnace, generation of the main intermediate of the process - dust from the electric arc furnace (EAF dust) occurs. This dust contains significant amounts of Zn and Fe, as well as Pb, Ca, Mn, Ni, Cu, Cd, Mg, Si, Cr, F, Cl and other elements and is considered hazardous industrial solid waste since it contains heavy metals. In order to separate Zn as a valuable component, hydrometallurgical treatment of EAF dust was investigated. The treatment consists of two stages: 1 st stage is water leaching of EAF dust performed in order to remove water-soluble compounds, and 2 nd stage is acid leaching in order to leach ZnO from EAF dust and obtain a ZnSO4 solution. With optimal parameters of the water leaching process of EAF dust, the achieved leaching rates of water-soluble compounds are as follows: 80.84% Cl, 60.63% K, 52.95% Na, 18.23% Ca, while with acid leaching of the solid residue obtained after water leaching at optimal parameters achieved leaching rate of Zn is 82.34%. In addition to the economic aspect of this treatment where the separation of Zn from EAF dust is performed, the treatment also has an ecological aspect because the transformation of hazardous waste into nonhazardous waste is performed, which has a positive effect on the environment.

Jezik

engleski

Datum

2021

Licenca

© All rights reserved

Predmet

Keywords: EAF dust, hydrometallurgical treatment, Zn separation, envinronment protection

Deo kolekcije (1)

o:179

Institut za rudarstvo i metalurgiju Bor