A novel process of preparing glass-ceramics directly from molten steel slag

A novel process technology to prepare glass-ceramics directly from molten steel slag(MSS) is proposed in the study.The liquid-solid mixing method was used to adjust the components of the MSS and glass-ceramics was obtained.The effects of heat-treatment conditions on the microstructure,physical and mechanical properties of samples were studied.Economical benefits of the novel process were analyzed.The results show that heat-treatment is a very effective approach to achieving crystallization.The dominant crystal phase in products is diopside [(Mg6Al2Fe2)Ca(Si1.5Al5)O2].The shape of the crystallization is like a granule.The glass-ceramic samples exhibited good mechanical properties and presented chemical stability.The economic benefits of the process are remarkable due to less energy consumption compared with conventional glass-ceramics production methods.