Abstract
AbstractIn order to improve the recycling efficiency of stainless-steel slag resources, the effect of different cooling rates on the crystallization behavior of CaO-SiO2-MgO-Cr2O3 based system was studied by using FactSage 7.1, XRD, SEM and IPP 6.0. The results indicated that the spinel is a high-temperature precipitated phase and the cooling rate had less effect on the final grain size of spinel crystals, but had greater influences on the nucleation of spinel crystals and the crystallization of silicates such as α-C2S.When the cooling rate was 12∘C/min, the spinel crystals was the unique precipitation. However, the spinel crystals and α-C2S could produce during the slag cooling process as the cooling rate was1∘C/min. Chromium in silicate phase is inclinable to leaching with the dissolution of silicate phase, so the formation of silicate phase should be controlled. According to the influence of the cooling rate on the formation of spinel crystals and the erosion of spinel crystals by α-C2S, it is suggested that the cooling rate of the stainless-steel slag in industrial treatment should not be lower than 12∘C/min.
Highlights
In order to improve the recycling efficiency of stainless-steel slag resources, the effect of different cooling rates on the crystallization behavior of CaO-SiO2-MgOCr2O3 based system was studied by using FactSage 7.1, XRD, scanning electron microscopy (SEM) and IPP 6.0
The results indicated that the spinel is a high-temperature precipitated phase and the cooling rate had less effect on the final grain size of spinel crystals, but had greater influences on the nucleation of spinel crystals and the crystallization of silicates such as α-C2S
The solidification process of CaO-SiO2-MgO-Al2O3-Cr2O38wt%FeO slag system was calculated by FactSage 7.1 in Figure 3, an integrated database computing system in chemical thermodynamics
Summary
Abstract: In order to improve the recycling efficiency of stainless-steel slag resources, the effect of different cooling rates on the crystallization behavior of CaO-SiO2-MgOCr2O3 based system was studied by using FactSage 7.1, XRD, SEM and IPP 6.0. Effect of Cooling Rate on Crystallization Behavior of CaO-SiO2 -MgO-Cr2 O3 Based Slag slag replaced cement as concrete bonding material without heavy metal dissolution. It reduced the demand for cement and contributed to the recycling of resources and environmental protection. Promoting the formation of more spinel phases, increasing the enrichment of Cr in spinel phases and reducing the leaching toxicity of chromium are the key technical routes in routes in the utilization of SS slag resources [14]. The optimum cooling rate for spinel crystal formation was determined to provide some suggestions for industrialized treatment of SS slag
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
