Structural characteristics and viscous behaviors of Al_(2)O_(3)-CaO-SiO_(2)-Fe_(2)O_(3)slags  

作　　者：Renze Xu Zhen Wang 

机构地区：[1]State Key Laboratory of Mesoscience and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China [2]School of Chemical Engineering,University of Chinese Academy of Sciences,Beijing 101408,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2025年第5期1068-1078,共11页矿物冶金与材料学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.52404353 and 22278413);the Project of Chinese Central Government Guides Local Science and Technology Development Funding(No.2024ZY0078).

摘　　要：The high-temperature properties of the Al_(2)O_(3)-CaO-SiO_(2)-Fe_(2)O_(3)basic slag had significant influences on steelmaking opera-tions and waste slag utilization.To further clarify the structural characteristics and properties of Al_(2)O_(3)-CaO-SiO_(2)-Fe_(2)O_(3)slags,the struc-tures and viscosities of the slags were researched.The slag liquidus temperature was determined,which decreased from 1365 to 1287℃after 4.16wt%-8.52wt%Al_(2)O_(3)was added to the slags and then increased to 1356℃after 17.07wt%Al_(2)O_(3)was added.Structure analysis indicated that increasing temperature depolymerized the structure of the 4.16wt%Al_(2)O_(3)-CaO-SiO_(2)-Fe_(2)O_(3)slag by decreasing the amount of complex AlO_(4)units and promoting the formation of simplified silicate monomers.The addition of Al_(2)O_(3)to slags could promote the polymerization of the slag structure by increasing the quantities of complex AlO_(4)tetrahedral and complicated Si-O units.Variations in the degree of structure polymerization showed similar trends at the same superheat degree and the same quenching temperature,and both samples could be used for analyzing the impact of Al_(2)O_(3)on slag structures.Finally,the viscous behavior of the present slag system was evaluated.Increasing Al_(2)O_(3)content could increase slag viscosity,and the apparent activation energy increased from 132.13 to 174.83 kJ/mol as the content of Al_(2)O_(3)increased from 4.16wt%to 17.07wt%.

关 键 词：molten slag ALUMINA structure VISCOSITY spectroscopy 

分 类 号：TF713[冶金工程—钢铁冶金]