Effects of magnesia sand types and their associated impurities on the microstructure, mechanical properties and slag resistance of MgO-MgAl2O4-ZrO2 refractories

Key Points

• Mechanical properties of MgO-MgAl2O4-ZrO2 refractories vary with different magnesia sand types, indicating material selection affects performance.
• Impurities found in magnesia sands significantly impact the microstructure and mineral phases of the refractories produced.
• Cross-sectional analysis of the refractories shows that slag resistance is closely linked to the purity of the sand used.
• This work highlights the importance of selecting appropriate magnesia sands to enhance the lifespan and effectiveness of refractories.