Skip to main content
main-content

Tipp

Weitere Artikel dieser Ausgabe durch Wischen aufrufen

25.08.2021 | Original Paper | Ausgabe 10/2021

Journal of Iron and Steel Research International 10/2021

Properties of ten-year-aged argon oxygen decarburization stainless steel slag

Zeitschrift:
Journal of Iron and Steel Research International > Ausgabe 10/2021
Autoren:
Ya-jun Wang, Ya-nan Zeng, Jun-guo Li, Yu-zhu Zhang, Wei Wang

Abstract

The characteristics of argon oxygen decarburization slag (AODS) for smelting stainless steel that has been aged for 10 years were analyzed. Three types of AODSs distributed at three positions in a slag heap were sampled for comparison experiments. Chemical analysis, mineral phase identification, thermogravimetric analysis, and micromorphology analysis were used to study the element migration trends and carbonation behavior of AODS after long-term aging. Sequential leaching tests were performed to study the chromium leachability of the aged AODS. The results show that during the long-term aging process, the AODS heap had undergone oxidation and carbonation, accompanied by element migration and mineralogical evolution. The surface slag had the highest degree of carbonation but the weakest chromium leachability. The chemical composition of the middle slag was the closest to that of the original slag. In the bottom steel slag, in addition to magnesium, certain depositions of other elements were present. The matrix phases in the aged slag were dicalcium silicate and merwinite, and the chromium was mainly wrapped in these matrix phases in the form of oxides, spinels, or alloys. Under the combined effects of carbonation and oxidation, the leaching characteristics of the chromium in the aged slag varied greatly depending on the location. The bottom slag had the strongest chromium leachability, and the hexavalent chromium had long-term continuous leachability.

Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten

Literatur
Über diesen Artikel

Weitere Artikel der Ausgabe 10/2021

Journal of Iron and Steel Research International 10/2021 Zur Ausgabe

Premium Partner

    Marktübersichten

    Die im Laufe eines Jahres in der „adhäsion“ veröffentlichten Marktübersichten helfen Anwendern verschiedenster Branchen, sich einen gezielten Überblick über Lieferantenangebote zu verschaffen. 

    Bildnachweise