TY - JOUR

T1 - Long-Term Reoxidation of Hot Briquetted Iron in Various Prepared Climatic Conditions

AU - Daghagheleh, Oday

AU - Schenk, Johannes

AU - Zheng, Heng

AU - Taferner, Bernd

AU - Forstner, Andreas

AU - Rosenfellner, Gerald

N1 - Publisher Copyright: © 2022 The Authors. Steel Research International published by Wiley-VCH GmbH.

PY - 2022/9/23

Y1 - 2022/9/23

N2 - The application of hot briquetted iron (HBI) in the electric arc furnace (EAF) is a promising method to obtain high-quality steel products with a guaranteed purity level. However, during the long-term transportation and storage, the HBI will be partially reoxidized, resulting in a loss of metallization degree. Herein, long-term reoxidation behaviors of commercial HBI under various prepared climatic conditions are investigated. The results show that HBI exposed to ambient air conditions develops nearly no reoxidation. However, interval and cyclic wetting and drying of HBI lead to the worst metallization loss problem, which must be avoided. Based on morphological analysis, the reoxidation is supposed to occur at the surface and then spread into the center area through cracks or pellet boundaries. The reoxidation gradually decreases the porosity of HBI by the closure of cracks and pores with rust but shows little influence on its physical strength.

AB - The application of hot briquetted iron (HBI) in the electric arc furnace (EAF) is a promising method to obtain high-quality steel products with a guaranteed purity level. However, during the long-term transportation and storage, the HBI will be partially reoxidized, resulting in a loss of metallization degree. Herein, long-term reoxidation behaviors of commercial HBI under various prepared climatic conditions are investigated. The results show that HBI exposed to ambient air conditions develops nearly no reoxidation. However, interval and cyclic wetting and drying of HBI lead to the worst metallization loss problem, which must be avoided. Based on morphological analysis, the reoxidation is supposed to occur at the surface and then spread into the center area through cracks or pellet boundaries. The reoxidation gradually decreases the porosity of HBI by the closure of cracks and pores with rust but shows little influence on its physical strength.

KW - climatic conditions

KW - hot briquetted iron

KW - long-term reoxidation

KW - metallization loss

KW - physical properties

UR - http://www.scopus.com/inward/record.url?scp=85139911751&partnerID=8YFLogxK

U2 - 10.1002/srin.202200535

DO - 10.1002/srin.202200535

M3 - Article

AN - SCOPUS:85139911751

VL - 94.2023

JO - Steel research international

JF - Steel research international

SN - 1611-3683

IS - 1

M1 - 2200535

ER -