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Stabilization of chromium containing EAF slags with spinel forming minerals
2007 (English)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Treatment of chromium in EAF-slag and vanadium in LD-slag are of much interest for steelmaking industries since both of them can affect the overall economy of the process and are also important from environmental point of view. Chromium in EAF-slag, which can be leached into environmental water, is one of the main obstacles against its usage as a road construction material in Swedish. Therefore, 80% of generated EAF slag (about 400 000 tons/year) is deposited into landfill. Recovery of vanadium can offer the benefits of both sellable and valuable V-products and also usable slag. This project is divided into two sections. In the first part, trials have been made in order to immobilise chromium in the EAF-slag. Used additives were three different spinels, in three different fractions. Results showed that chromium can be stabilized in slag at low cost, and only few changes in procedure’s steps are needed. In the second part of the project, same spinels with two different fractions have been utilised to investigate their efficiency on the enrichment of vanadium in LD-slag. The results depict that additives except one of them are not stable in LD-slag.

Place, publisher, year, edition, pages
Keyword [en]
Technology, Chromium, Vanadium, Stabilization, Enrichment, EAF slag, LD, slag, Spinel, Hazardous Elements, Environmental, Considerations
Keyword [sv]
URN: urn:nbn:se:ltu:diva-55826ISRN: LTU-PB-EX--07/065--SELocal ID: ca3cd6c7-1679-44d6-bb13-6ef370be0ae6OAI: diva2:1029210
Subject / course
Student thesis, at least 15 credits
Educational program
Chemical Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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