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Influence of Mn oxides on chemical state and leaching of chromium in EAF slag
Central Iron and Steel Research Institute, Beijing.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
University of Science and Technology, Beijing.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2013 (English)In: Metalugia International, ISSN 1582-2214, Vol. 18, no 8Article in journal (Refereed) Published
Abstract [en]

In order to study the influences of Mn oxides on Cr in Electronic Arc Furnace (EAF) slag produced in a stainless steelmaking plant. To simulate EAF slags, two synthetic slags (slag A and slag B) were prepared through melting the two groups of reagent-grade compounds, respectively. The phase composition of samples was characterized by means of XRD. In addition, the slags with different particle size and some mixture were leached following Europe standard procedure. There was only one main compound MgCr2O4 found in spinel phase in slag A. While there were two compounds MgCr2O4 and Mn2AlO4 co-existed in spinel phase in slag B, in which Mn and Cr occupy the octahehral sites. For leaching tests, the influence of different factors, such as slag types, slag particles size, mixed manganese oxides, were studied in detail. The leaching result shows that MnO2 melted in slag is the most important factor for improving Cr leaching. But Mn oxides mixed in Mn-free slag have a little influence on Cr leaching.

Place, publisher, year, edition, pages
2013. Vol. 18, no 8
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-6617Local ID: 4dca6f50-b155-4716-80c1-f8a908251415OAI: oai:DiVA.org:ltu-6617DiVA: diva2:979503
Note
Godkänd; 2013; 20130703 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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