Effect of FeO on the network structure and crystallization behavior of the blast furnace slag/basic oxygen furnace slag glass-ceramics

This study investigates the utilization of blast furnace slag (BFS) and basic oxygen furnace slag (BOFS) as raw materials for the production of glass-ceramics. By varying the proportion of BOF slag, the study investigates the impact of FeO content on the structure, crystallization behavior, and properties of the glass-ceramics. The optimal FeO addition ratio is determined, providing a promising approach for the efficient and high-value recycling of these two types of industrial waste. The results show that FeO causes depolymerization of the glass network, enhances the crystallization of the parent glass, and significantly improves the physicochemical properties of the glass-ceramics. When the FeO content is 2.56 wt.% (with 8.64 wt.% BOFS and 38.39 wt.% BFS), the glass-ceramics exhibited a bulk density of 2.9 g/cm³, flexural strength of 169.1 MPa, hardness of 7.7 GPa, and outstanding corrosion resistance. The findings contribute to advancing the sustainable recycling of BFS and BOFS, reducing their environmental impact while creating cost-effective building and industrial materials.