Abstract
The synthetic stainless steel slag systems with different basicity and different FeO contents were prepared using reagent powders, the crystallization of which was experimented by cooling from melt to 1400°C in N2 atmosphere. The crystallization in the collected slag was studied using X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). It was found that an amorphous structure in slags with FeO was easier to be formed in low basicity (CaO/SiO2) of 1.0 than the basic slags, while in slag systems with high basicity of 1.25 or 1.5, well crystalline phases including spinel and merwinite were formed, irrespective of FeO content. The results also showed that higher FeO content and lower basicity improved the precipitation of Cr2O3 into Mg(Al,Fe,Cr)2O4 spinel solid solution.
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