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Corrosion Mechanisms of Different Refractory Aggregates in Contact with SiO2-MgO-Based Slag

Abstract: To improve the utilization and evaluation of metallurgical solid waste, the investigation of slag has become a focused research subject in the recent years. However, when slag with various compositions was smelted to produce high value-added products in the slag furnace, the SiO2-MgO based slag caused serious damage to the refractory lining material of the furnace compared to the common CaO-Al2O3-SiO2 based slag. The tabular alumina, lightweight alumina, silicon carbide, mullite and brown fused alumina aggregates were selected for testing. The static crucible method was used to investigate the SiO2-MgO based slag corrosion and comparative analysis was performed. The results show that mullite-silicon carbide or tabular alumina-silicon carbide refractories are promising for the use as lining materials of SiO2-MgO slag smelting furnaces.

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This work was financially supported by the National Natural Science Foundation of China (Grant No. U1860205), the Fund for the Excellent Creative Research Groups of Higher Education of Hubei Province of China (Grant No. T201602), the Key Programme of Natural Science Foundation of Hubei Province, China (Contract No. 2017CFA004), and the Recruitment Program of High-end Foreign Experts of State Administration of Foreign Experts Affairs (GDW20174200160).

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Correspondence to Chen Bai.

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Wu, M., Huang, A., Bai, C. et al. Corrosion Mechanisms of Different Refractory Aggregates in Contact with SiO2-MgO-Based Slag. Interceram. - Int. Ceram. Rev. 69, 22–29 (2020).

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