工程科学学报2017，Vol.39Issue(2)：215-221,7.DOI:10.13374/j.issn2095-9389.2017.02.008
MgO含量对CaO-Al2O3-MgO-FexO-SiO2-K2O系熔体性质的影响
Influence of MgO content on the thermo-physical properties of CaO-Al2O3-MgO-FexO-SiO2-K2O slags
摘要
Abstract
The effects of MgO content on the viscosity and melting behaviors of CaO- Al2O3- MgO- FexO- SiO2- K2O slags were studied. The slag samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) to identify precip-itated phases during the cooling process. Meanwhile, theoretical calculations on the viscosities, solidus/liquidus temperatures as well as quantities of various precipitated phases from the slag system were also carried out by using the FactSage software, which were com-pared with the experimental results. The results indicate that the addition of MgO in slag could cause the increase of melting tempera-ture. The relation between viscosities and temperature presents a breakpoint where the viscosity has a rapid rise, and above this transi-tion temperature, MgO content has little effect on the viscosity. The transition temperature increases with the increasing of MgO con-tent. In the process of slag cooling, the crystalline phases are mainly composed of olivine and spinel. From the calculation results, it could be found that the addition of MgO enhances the precipitates of olivine, which makes the viscosity increase suddenly.关键词
黏度/熔化温度/氧化镁/析出相Key words
viscosity/melting temperature/magnesium oxide/precipitated phase分类
矿业与冶金引用本文复制引用
候朋涛,王丽君,刘仕元,张建坤,周国治..MgO含量对CaO-Al2O3-MgO-FexO-SiO2-K2O系熔体性质的影响[J].工程科学学报,2017,39(2):215-221,7.基金项目
中国博士后科学基金委资助项目(2014M560046) （2014M560046）
国家自然科学基金面上资助项目(51374020) （51374020）
