Investigation of selective leaching conditions of ZnO, ZnFe2O4 and Fe2O3 in electric arc furnace dust in HNO3 Scientific paper

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Published: Feb 18, 2022
Updated: 18.02.2022
DOI: https://doi.org/10.2298/JSC200523004Z%20
Keywords:
environmental protection zinc recovery leaching zinc oxide zinc ferrite

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Mert Zoraga
Istanbul University-CerrahpasaIstanbul University–Cerrahpasa, Engineering Faculty, Metallurgical and Materials Engineering Department, 34320, Avcilar, Istanbul, Turkey
https://orcid.org/0000-0002-7723-728X
Tugba Yucel
Istanbul University–Cerrahpasa, Engineering Faculty, Metallurgical and Materials Engineering Department, 34320, Avcilar, Istanbul, Turkey
https://orcid.org/0000-0002-0374-4895
Sedat Ilhan
Istanbul University–Cerrahpasa, Engineering Faculty, Metallurgical and Materials Engineering Department, 34320, Avcilar, Istanbul, Turkey
https://orcid.org/0000-0001-9976-0955
Ahmet Orkun Kalpakli
Istanbul University–Cerrahpasa, Engineering Faculty, Metallurgical and Materials Engineering Department, 34320, Avcilar, Istanbul, Turkey
https://orcid.org/0000-0002-8382-4085

Abstract

Electric arc furnace dust (EAFD) includes mainly Zn, Fe, Pb, Ca and Mn-bearing compounds. Thus, EAFD is classified as a hazardous waste. The dis­solution behavior of Zn- and Fe-bearing compounds in EAFD in nitric acid solutions was investigated in this work. The composition of Zn- and Fe-bearing compounds in the EAFD was determined as 28.58, 37.96 and 11.33 % for ZnO, ZnFe2O4 and Fe2O3, respectively. The effect of stirring speed, temperature and HNO3 concentration on the dissolution rate of ZnO, ZnFe2O4 and Fe2O3 were investigated and optimum leaching conditions determined. While ZnO was dis­solved rapidly, the dissolution rate of ZnFe2O4 increased with increasing tem­pe­rature and HNO3 concentration. Fe2O3 was not soluble in 0.5 M HNO3 solut­ion at 40 °C, whereas it was dissolved completely in 4 M HNO3 solution at 80 °C.

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How to Cite
[1]
M. Zoraga, T. Yucel, S. Ilhan, and A. O. Kalpakli, “Investigation of selective leaching conditions of ZnO, ZnFe2O4 and Fe2O3 in electric arc furnace dust in HNO3: Scientific paper”, J. Serb. Chem. Soc., vol. 87, no. 3, pp. 377–388, Feb. 2022.
Issue
Vol. 87 No. 3 (2022)
Section
Metallic Materials and Metallurgy
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