Formation process and properties of aluminium-chromium slag

摘要

In order to realize the application of aluminium-chromium slag for economical recycling, its formation process and properties, including the chemical composition and phase composition, physical properties, and microstructure, were studied. The main chemical components of aluminium-chromium slag are Al2O3 and Cr2O3; Cr, CaO, and MgO, among others, are also present as impurities. The main phase is a solid solution of aluminium and chromium oxides; this possesses high refractoriness, good mechanical properties at high temperature, and relative stability in chemical composition. CaO is the main volatile component; variations in the CaO levels affect the thermal conductivity and high-temperature linear thermal expansion, and thus, the mechanical properties of the slag.