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Experimental investigation on BOF slag oxidation in air
China Building Material Academy, China; Beifang University of Nationalities, China.
China Building Material Academy, China.
RISE - Research Institutes of Sweden, Materials and Production, Swerea MEFOS.
Beifang University of Nationalities, China.
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2019 (English)In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812, Vol. 46, no 8, p. 747-754Article in journal (Refereed) Published
Abstract [en]

Basic oxygen furnace (BOF) slag contains a significant amount of iron-containing species, which is considered to be iron resources and therefore need to be recovered. In this work, the oxidation behaviour of BOF slag under air (at selected oxidation temperatures and holding time) was investigated to explore the potential of transforming non-magnetic wustite in the BOF slag into magnetic spinel, which may subsequently be recovered by magnetic separation. The experimental results show that the iron-containing spices in the BOF slag can be oxidised into magnetic spinel phases in the investigated temperature range of 1000–1150°C and thereafter be recovered by magnetic separation. The formation of these phases is closely related to the oxidation temperatures and holding time: a higher oxidation temperature and longer holding time lead to a larger amount of formed magnetic species; however, the amount of formed magnetic species decreases at elevated temperature (>1050°C) and with extended holding time (>40 min). 

Place, publisher, year, edition, pages
Taylor and Francis Ltd. , 2019. Vol. 46, no 8, p. 747-754
Keywords [en]
BOF slag, Magnetic separation, oxidation, spinel, Basic oxygen converters, Iron, Metal recovery, Slags, Basic oxygen furnace slag (BOF), BOF slags, Elevated temperature, Experimental investigations, Oxidation behaviours, Oxidation temperature, Temperature range
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-40793DOI: 10.1080/03019233.2017.1410945Scopus ID: 2-s2.0-85041110457OAI: oai:DiVA.org:ri-40793DiVA, id: diva2:1372861
Note

Funding details: Cooperation Program of Qinghai Province, 2013ZYH187; Funding details: 2014ZYH50; Funding details: Technische Universiteit Delft, TU Delft; Funding details: WP4; Funding text 1: This work was funded by the Centre of Advanced Mining and Metallurgy (WP4, Metallurgy) at Lule? University of Technology. The International Cooperation Program of Ningxia Province [grant number 2013ZYH187] and the Ningxia Provincial Natural Science Fund [2014ZYH50] were acknowledged for the financial support.

Available from: 2019-11-25 Created: 2019-11-25 Last updated: 2019-11-25Bibliographically approved

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