1. Thermodynamic analysis of carbothermal reduction of zinc and iron from EAF dust.
- Author
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Grigoriev, E. V., Senin, A. V., Kapelyushin, Yu., and Ryazanov, A. G.
- Subjects
IRON ,METAL wastes ,DUST ,ARC furnaces ,ELECTRIC arc ,ZINC ferrites - Abstract
Accumulation of the metallurgical waste stimulates development of the recycling technologies. The paper investigates the chemical and phase composition of the particular electric arc furnace (EAF) dust which is formed in the gas cleaning system during steel smelting from scrap. It was found that the main components of the EAF dust under study are ZnFe
2 O4 , ZnO, CaCO3 , SiO2 and KCl. The XRD phase analysis showed that the prevailing phase is zinc ferrite ZnFe2 O4 (62 %). The thermodynamic analysis was carried out using TERRA software. According to modeling, the iron reduction proceeds sequentially ZnFe2 O4 – Fe3 O4 −FeO–Fe in the temperature range from 500 to 700 °C. Above 510 °C ZnFe2 O4 decomposes with formation of ZnO and Fe3 O4 . Zinc oxide is intensively reduced in the temperature range from 800 to 900 °C passing into the gas phase. [ABSTRACT FROM AUTHOR]- Published
- 2024
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