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Materials Properties and Liquid Flow in the Hearth of the Experimental Blast Furnace
Process Metallurgy Department, SWERIM AB, Luleå, Sweden.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering. Swerim AB.ORCID iD: 0000-0003-3363-351x
Process Metallurgy Department, SWERIM AB, Luleå, Sweden.
2019 (English)In: Metals, E-ISSN 2075-4701, Vol. 9, no 5, article id 572Article in journal (Refereed) Published
Abstract [en]

The materials’ properties in the hearth of the blast furnace are very crucial for the hearthconditions. In this study, a number of coke, slag, metal, and aggregate samples were collected fromthe hearth of the LKAB’s experimental blast furnace (EBF). Subsequently, the coke, slag, and metalsamples were chemically analyzed by X-ray fluorescence (XRF) or optical emission spectrometer(OES); the aggregate samples were analyzed by scanning electron microscope combined withenergy-dispersive X-ray spectroscopy (SEM/EDS). The possible flow field of the liquid in the EBFhearth before quenching is depicted according to Cu tracers in the metal samples. Selected elementsin the coke, slag, and metal were mapped for two sampling layers in the hearth, as well as in one crosssection of the flow field. The results indicate that there exists an area beneath, and in front of, tuyere 3,where the flow resistance of the liquid was high. The high flow resistance contributed to the formationof a cold zone in the close-to-wall region and at the bottom of the EBF hearth. The temperaturedistribution in the EBF hearth has significant impacts on the chemical properties of the materials indierent positions of the EBF hearth, as well as on the radial and vertical distributions of certainelements/components.

Place, publisher, year, edition, pages
MDPI, 2019. Vol. 9, no 5, article id 572
Keywords [en]
blast furnace, hearth conditions, materials properties
National Category
Metallurgy and Metallic Materials
Research subject
Centre - Centre for Advanced Mining & Metallurgy (CAMM); Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-74012DOI: 10.3390/met9050572ISI: 000478818700089Scopus ID: 2-s2.0-85066732596OAI: oai:DiVA.org:ltu-74012DiVA, id: diva2:1317620
Projects
CAMM and RFCS Optiblafins
Note

Validerad;2019;Nivå 2;2019-06-10 (oliekm)

Available from: 2019-05-23 Created: 2019-05-23 Last updated: 2019-08-28Bibliographically approved

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Sundqvist Ökvist, Lena

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  • apa
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