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Minerals, Volume 9, Issue 10
October 2019 - 80 articles
Cover Story: Steel and ferrochrome slags can be considered low-grade resources for chromium. To devise suitable recovery flowsheets, a detailed view on Cr concentration and distribution is essential. This knowledge can only be attained by combining several analytical techniques. Model streams of steel, stainless steel, and ferrochrome slags were thoroughly characterized by wet chemistry, XRD, SEM-EDX, and MLA. The results showed that chromium is present in distinct but often small spinel phases, intergrown with other minerals and showing a considerable zonation in Cr content. Total Cr concentration was found to differ largely based on the chemical dissolution method. Acid dissolution methods commonly applied in environmental legislation were found incapable of fully dissolving spinel structures, leading to severe underestimations of chromium content. View this paper
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Minerals - ISSN 2075-163X