Thermodynamic analysis of zinc ferrite (ZnFe2O4) formation inside the HIsarna off-gas system

2022

HIsarna reactor is characterized by a high raw materials versatility and is therefore attractive for processing secondary iron sources. Among the materials that can be recycled through HIsarna, zinc-bearing material has drawn a special attention. Based on the plant data, once dust-containing Zinc was injected into the main reactor, a final collected dust with a zinc content of 16% was achieved which opened up possibilities of higher enrichment for direct reuse in Zn smelting as a secondary source and an alternative for Zn ore (the primary source). However Zn vapor can react with iron oxide to form zinc ferrite (ZnFe2O4), which is an undesired product. Hence, the main focus of this study is to minimize the formation of ZnFe2O using thermodynamic (FactSage) and computational fluid dynamic tools. After detecting regions with high potential of ZnFe2O4 formation, proper geometrical and operational modifications of the off-gas system is proposed to minimize the formation of zinc ferrite.
Team Yongxiang Yang
Team Erik Offerman

CO–H mixture combustion; dog leg; equilibrium graph; frog leg; HIsarna; Thermodynamic analysis; zinc ferrite formation; journal article

10.1080.03019233.2022.2124491

Open access content. Open access content
© 2022 A. Hosseini, Elmira Moosavi-Khoonsari, Koen Meijer, Johannes Hage, Tim Peeters, S.E. Offerman, Y. Yang

English

NLTUD oai:tudelft.nl:uuid:5de4c6b3-5f3b-43c5-9cc2-1a0f5fe89561
doi:10.1080/03019233.2022.2124491
1357880781

DELFT UNIV OF TECHNOL
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