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Experimental Determinations of Mixing Times in the IronArc Pilot Plant Process
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Processing.ORCID iD: 0000-0002-9413-4098
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Processing.ORCID iD: 0000-0003-4384-7984
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Processing.ORCID iD: 0000-0002-2109-3731
ScanArc Plasma Technol AB, SE-81321 Hofors, Sweden..
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2019 (English)In: METALS, ISSN 2075-4701, Vol. 9, no 1, article id 101Article in journal (Refereed) Published
Abstract [en]

IronArc is a newly developed technology and an emerging future process for pig iron production. The long-term goal with this technology is to reduce the CO2 emissions and energy consumption compared to existing technologies. The production rate of this process is dependent on the stirring, which was investigated in the pilot plant process by measuring the mixing time in the slag bath. Moreover, slag investigations were done both based on light optical microscope studies as well as by Thermo-Calc calculations in order to determine the phases of the slag during operation. This was done because the viscosity (which is another important parameter) is dependent on the liquid and solid fractions of the slag. The overall results show that it was possible to determine the mixing time by means of the addition of a tracer (MnO2 powder) to the slag. The mixing time for the trials showed that the slag was homogenized after seconds. For two of the trials, homogenization had already been reached in the second sample after tracer addition, which means <= 8 s. The phase analysis from the slag indicated that the slag is in a liquid state during the operation of the process.

Place, publisher, year, edition, pages
MDPI , 2019. Vol. 9, no 1, article id 101
Keywords [en]
IronArc process, Ironmaking, pig iron production, mixing time, CO2 reduction, slag investigation
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-246292DOI: 10.3390/met9010101ISI: 000459738500100Scopus ID: 2-s2.0-85060686372OAI: oai:DiVA.org:kth-246292DiVA, id: diva2:1298933
Note

QC 20190325

Available from: 2019-03-25 Created: 2019-03-25 Last updated: 2019-05-13Bibliographically approved

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Bölke, KristoferErsson, MikaelAndersson, Nils A. I.Jönsson, Pär

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