Yong Lin , Ziyou Yu , Xiao Liu , Baijun Yan , Timo Fabritius , Qifeng Shu
{"title":"低碱度CaO-SiO2-10wt的粘度和结构。% FeOx-10wt。% P2O5渣系统","authors":"Yong Lin , Ziyou Yu , Xiao Liu , Baijun Yan , Timo Fabritius , Qifeng Shu","doi":"10.1016/j.jnoncrysol.2025.123796","DOIUrl":null,"url":null,"abstract":"<div><div>Slag viscosity is a crucial factor affecting the dissolution of silica modifiers in molten basic oxygen furnace (BOF) slag, particularly during the online modification process. In this work, the viscosity of low basicity CaO-SiO<sub>2</sub>–10 wt.% Fe<sub>2</sub>O<sub>3</sub>–10 wt.% P<sub>2</sub>O<sub>5</sub> slag was measured by the rotating cylinder method. The structure of glassy slag samples was analyzed by multiple spectroscopic techniques to offer a better understanding of the relationship between slag viscosity and structure. It is concluded that the slag viscosity increases with decreasing binary basicity (CaO wt.%/SiO<sub>2</sub> wt.%) from 1.46 to 1.16, and the calculated apparent activation energy increases slightly from 147.57 to 161.78 kJ·mol<sup>−1</sup>. The results of X-ray photoelectron spectroscopy (XPS), Fourier transformation infrared (FT-IR), Raman spectroscopy, and <sup>29</sup>Si solid-state magic angular spinning nuclear magnetic resonance (MAS-NMR) reveal that the degree of polymerization (DOP) of slag increases with decreasing the slag basicity, which is consistent with the viscosity variation with basicity. Therefore, the dissolution of silica modifier would be deteriorated as silica content in slag increases. In addition, the <sup>31</sup>P solid-state MAS-NMR demonstrates that phosphorous exists in isolated orthophosphate (Q<sup>0</sup>(P)) structural unit. It was shown that <sup>29</sup>Si solid-state MAS-NMR is limited in the structural quantification of Fe-bearing silicate glasses due to the paramagnetic effect of iron ions.</div></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"668 ","pages":"Article 123796"},"PeriodicalIF":3.5000,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Viscosity and structure of low basicity CaO-SiO2–10wt.% FeOx-10wt.% P2O5 slag system\",\"authors\":\"Yong Lin , Ziyou Yu , Xiao Liu , Baijun Yan , Timo Fabritius , Qifeng Shu\",\"doi\":\"10.1016/j.jnoncrysol.2025.123796\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Slag viscosity is a crucial factor affecting the dissolution of silica modifiers in molten basic oxygen furnace (BOF) slag, particularly during the online modification process. In this work, the viscosity of low basicity CaO-SiO<sub>2</sub>–10 wt.% Fe<sub>2</sub>O<sub>3</sub>–10 wt.% P<sub>2</sub>O<sub>5</sub> slag was measured by the rotating cylinder method. The structure of glassy slag samples was analyzed by multiple spectroscopic techniques to offer a better understanding of the relationship between slag viscosity and structure. It is concluded that the slag viscosity increases with decreasing binary basicity (CaO wt.%/SiO<sub>2</sub> wt.%) from 1.46 to 1.16, and the calculated apparent activation energy increases slightly from 147.57 to 161.78 kJ·mol<sup>−1</sup>. The results of X-ray photoelectron spectroscopy (XPS), Fourier transformation infrared (FT-IR), Raman spectroscopy, and <sup>29</sup>Si solid-state magic angular spinning nuclear magnetic resonance (MAS-NMR) reveal that the degree of polymerization (DOP) of slag increases with decreasing the slag basicity, which is consistent with the viscosity variation with basicity. Therefore, the dissolution of silica modifier would be deteriorated as silica content in slag increases. In addition, the <sup>31</sup>P solid-state MAS-NMR demonstrates that phosphorous exists in isolated orthophosphate (Q<sup>0</sup>(P)) structural unit. It was shown that <sup>29</sup>Si solid-state MAS-NMR is limited in the structural quantification of Fe-bearing silicate glasses due to the paramagnetic effect of iron ions.</div></div>\",\"PeriodicalId\":16461,\"journal\":{\"name\":\"Journal of Non-crystalline Solids\",\"volume\":\"668 \",\"pages\":\"Article 123796\"},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2025-09-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Non-crystalline Solids\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0022309325004120\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Non-crystalline Solids","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022309325004120","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Viscosity and structure of low basicity CaO-SiO2–10wt.% FeOx-10wt.% P2O5 slag system
Slag viscosity is a crucial factor affecting the dissolution of silica modifiers in molten basic oxygen furnace (BOF) slag, particularly during the online modification process. In this work, the viscosity of low basicity CaO-SiO2–10 wt.% Fe2O3–10 wt.% P2O5 slag was measured by the rotating cylinder method. The structure of glassy slag samples was analyzed by multiple spectroscopic techniques to offer a better understanding of the relationship between slag viscosity and structure. It is concluded that the slag viscosity increases with decreasing binary basicity (CaO wt.%/SiO2 wt.%) from 1.46 to 1.16, and the calculated apparent activation energy increases slightly from 147.57 to 161.78 kJ·mol−1. The results of X-ray photoelectron spectroscopy (XPS), Fourier transformation infrared (FT-IR), Raman spectroscopy, and 29Si solid-state magic angular spinning nuclear magnetic resonance (MAS-NMR) reveal that the degree of polymerization (DOP) of slag increases with decreasing the slag basicity, which is consistent with the viscosity variation with basicity. Therefore, the dissolution of silica modifier would be deteriorated as silica content in slag increases. In addition, the 31P solid-state MAS-NMR demonstrates that phosphorous exists in isolated orthophosphate (Q0(P)) structural unit. It was shown that 29Si solid-state MAS-NMR is limited in the structural quantification of Fe-bearing silicate glasses due to the paramagnetic effect of iron ions.
期刊介绍:
The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid.
In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.