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Direct alloying steel with chromium by briquettes made from chromite ore, mill scale, and petroleum coke
Process Metallurgy Department, Swerea MEFOS AB.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering. Process Metallurgy Department, Swerea MEFOS AB.
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
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Number of Authors: 5
2017 (English)In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, Vol. 88, no 5, 1600247Article in journal (Refereed) Published
Abstract [en]

In this work, the effectiveness of using briquettes made from chromite ore, mill scale, and petroleum coke for direct chromium alloying is tested by induction furnace trials carried out in three different scales. The experimental results show that steel scrap can be alloyed with chromium by the chromite ore in the briquettes and the Cr yield from the chromite ore increases with the increase in mill scale addition to the briquettes: the more mill scale is added to the briquettes, the lower the mass ratio of Cr to (Cr+Fe) would be, leading to a higher Cr yield from the chromite ore. Specifically, the maximum Cr yield from the chromite ore is 99.9% when the mass ratio of Cr to (Cr+Fe) in the briquettes is 0.05, and being 93.0% when the ratio is 0.10. However, when the ratio of Cr to (Cr+Fe) in the briquettes reaches 0.20, the maximum Cr yield is only 67.1%. The reduction of chromite ore under the present experimental conditions is promoted by a solid-state reduction mechanism

Place, publisher, year, edition, pages
2017. Vol. 88, no 5, 1600247
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy; Embedded System
Identifiers
URN: urn:nbn:se:ltu:diva-60128DOI: 10.1002/srin.201600247ScopusID: 2-s2.0-85000799322OAI: oai:DiVA.org:ltu-60128DiVA: diva2:1044397
Note

Validerad; 2017; Nivå 2; 2017-05-09 (inah)

Available from: 2016-11-03 Created: 2016-11-03 Last updated: 2017-05-10Bibliographically approved

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