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Direct Alloying Steel with Chromium by Briquettes Made from Chromite Ore, Mill Scale, and Petroleum Coke
RISE - Research Institutes of Sweden, Swerea, Swerea MEFOS. Luleå University of Technology, Luleå, Sweden.
RISE - Research Institutes of Sweden, Swerea, Swerea MEFOS. Luleå University of Technology, Luleå, Sweden.
RISE - Research Institutes of Sweden, Swerea, Swerea MEFOS.
Luleå University of Technology, Luleå, Sweden.
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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
Wiley-VCH Verlag , 2017. Vol. 88, no 5, 1600247
Keyword [en]
carbothermic reduction, chromite ore, direct alloying, mill scale, Alloying, Briquets, Carbothermal reduction, Chromite, Chromite deposits, Chromium, Ores, Petroleum coke, Steel scrap, Chromite ores, Chromium alloying, Experimental conditions, Induction furnace, Mass ratio, Solid state reduction, Ore reduction
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-29778DOI: 10.1002/srin.201600247Scopus ID: 2-s2.0-85000799322OAI: oai:DiVA.org:ri-29778DiVA: diva2:1108408
Available from: 2017-06-12 Created: 2017-06-12 Last updated: 2017-06-12Bibliographically approved

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