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Reduction Behaviour of Self-reducing Blends of In-plant Fines in Inert Atmosphere
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.ORCID iD: 0000-0002-2358-7719
Swerea MEFOS AB.
Swerea MEFOS AB, Luleå tekniska universitet, SSAB Tunnplåt AB, LKAB.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
2015 (English)In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 55, no 10, p. 2082-2089Article in journal (Refereed) Published
Abstract [en]

Large amount of dust and sludge recovered during cleaning of iron and steel making process gases are annually put on landfill or intermediate storage. These by-products have high contents of iron (Fe) and carbon (C) that potentially could be utilized in the steel industry. However, due to the presence of impuritycompounds as well as the unsuitable physical properties, these by-products cannot be recycled directly. The main objective of the present study is to investigate the possibilities to recover the valuable components Fe and C in these by-products and thereby decrease the need of landfills at the steel plants as well as reduce the consumption of virgin materials, including fossil coal, and reduce CO2 emissions. A recycling route has been investigated by means of laboratory trials and FactSage thermodynamic modeling. Four different blends of BF and BOF dusts and sludges are prepared in predetermined ratios. Reduction behavior of each blend is studied using TG/DTA/QMS and in-situ high temperature X-ray diffraction. High temperature physical properties like softening, swelling and melting are also investigated by means of heatingmicroscope. The obtained results indicate the feasibility of both minimizing the impurity elements as well as recovering of valuable components.

Place, publisher, year, edition, pages
2015. Vol. 55, no 10, p. 2082-2089
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-5959DOI: 10.2355/isijinternational.ISIJINT-2015-182ISI: 000363914400006Scopus ID: 2-s2.0-84983551932Local ID: 42696ba2-1d8e-4d06-b598-809ef4e99045OAI: oai:DiVA.org:ltu-5959DiVA, id: diva2:978835
Note
Validerad; 2015; Nivå 2; 20151119 (hesahm)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Ahmed, HeshamBjörkman, Bo

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