Effect of Slag Basicity on Alumina Dissolution and Diffusivity:A High-temperature Confocal Laser Scanning Microscopy Study  

作　　者：Burhanuddin Harald HARMUTH 

机构地区：[1]Montanuniversität Leoben,Leoben 8700,Austria

出　　处：《China's Refractories》2024年第2期27-34,共8页中国耐火材料（英文版）

基　　金：funded by the COMET program within the K2 Center “Integrated Computational Material;Process and Product Engineering (IC-MPPE)”, Project No. 859480;supported by the Austrian Federal Ministries for Transport;Innovation;and Technology (BMVIT);Digital and Economic Affairs (BMDW);represented by the Austrian Research Funding Association (FFG);the federal states of Styria;Upper Austria;and Tyrol

摘　　要：Alumina is one of the crucial and extensively utilized refractory components.As the refractory wear due to dissolution at elevated temperatures during operation is a major threat to refractory lifespan,quantifying dissolution is important for developing cost-effective and resource-efficient refractories.This study investigated the dissolution of alumina particles in two silicate and one calcium aluminate slags at 1450,1500,and 1550°C using high-temperature confocal laser scanning microscopy(HT-CLSM).Dissolution was quantified in terms of diffusivity,with all influencing factors,including Stefan flow and bath movement,incorporated into the determination process.The trends observed in total dissolution time and diffusivity in three slags at three experimental temperatures could not be explained solely on the basis of slag basicity.Two parameters,considering the influencing factors,were introduced to explain these trends.Furthermore,the linear trend observed in Arrhenius plots of diffusivities supports the diffusivity results.Additionally,good agreement between the diffusivities of alumina in one silicate slag obtained via CLSM and rotating finger test investigations verified the reliability of the results.

关 键 词：ALUMINA DISSOLUTION DIFFUSIVITY CORROSION REFRACTORY 

分 类 号：TQ175.1[化学工程—硅酸盐工业]