有色金属科学与工程2025，Vol.16Issue(6)：857-864,8.DOI:10.13264/j.cnki.ysjskx.2025.06.003
TiO2含量对高FeO高炉初渣黏度和结构的影响
Effects of TiO2 content on the viscosity and structure of primary slag in blast furnace with high FeO content
摘要
Abstract
The physicochemical properties of primary slag in a blast furnace are closely related to the smooth operation of the blast furnace.In this paper,the CaO-SiO2-MgO-Al2O3-FeO-TiO2 slag system in vanadium and titanium ore blast furnace smelting was studied.The changes in the properties of primary slag with varying titanium load were examined through a combination of experimental studies and thermodynamic calculations.The slag viscosity was measured by the rotating cylinder method,while FactSage thermodynamic software was employed to calculate crystal phase transition during the crystallization process.Raman spectroscopy was further applied to analyze the structural evolution of the slag.The results show that with the increase of TiO2 content in the primary slag,the slag viscosity decreases.The lower the temperature,the more significant the impact of TiO2 on the viscosity of the slag.TiO2 behaves as a basic oxide in this slag system,dissociating free oxygen ions to disrupt the slag structure.Additionally,as the TiO2 content increases,the initial crystallization temperatures of perovskite and titaniferous spinel exhibit an upward trend,while the crystallization temperature of melilite gradually decreases and remains below 1 573 K.Thereby,TiO2 can promote the precipitation of Ti-containing crystalline phases during the cooling process.When TiO2 is added to the slag,it releases Ti4+and free oxygen ions(O2-),and O2-can break the bridging oxygen in the Si-O network,simplifying complex structural units.关键词
TiO2/晶相转变/碱性氧化物/桥接氧Key words
TiO2/crystal phase transition/alkaline oxide/bridging oxygen分类
矿业与冶金引用本文复制引用
WU Yaming,HUANG Yun,TAO Linhe,WU Zhikang,CAI Xuebin,ZUO Haibin..TiO2含量对高FeO高炉初渣黏度和结构的影响[J].有色金属科学与工程,2025,16(6):857-864,8.基金项目
国家自然科学基金资助项目(U1960205) （U1960205）
中国宝武低碳冶金创新基金资助项目(BWLCF202101) （BWLCF202101）
