Precipitation Behaviour of Chromium in CaO-MgO-SiO₂-Al₂O₃-Cr₂O₃-Fe₂O₃ Slag System

Abstract:

Different cooling process, annealing temperature and addition of B₂O₃ were experimented on the CaO-MgO-SiO₂-Al₂O₃-Cr₂O₃-Fe₂O₃ slag system with an aim to investigate the chromium precipitation behaviour. The solidified slags were characterized by XRD, SEM, EDX and EPMA. It was shown that, under melt-quenching process, chromium was immobilized in amorphous structure in the slag with basicity lower than 1.0 and Cr₂O₃ content less than 4.0 wt%. It was also found that addition of B₂O₃ and higher annealing temperature would be helpful for the precipitation of chromium into spinel solid solution in slag with basicity of 1.5.

• Periodical: Advanced Materials Research (Volumes 1073-1076)
• Pages: 21-27
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.21
• Online since: December 2014
• Authors: Xing Rong Wu*, Bao Ma, Hui Hong Lü, Liao Sha Li, Xing Mei Shen
• Keywords: Amorphous Structure, Chromium, Precipitation, Spinel Solid Solution

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