Effect mechanism of aluminum occurrence and content on the induration characteristics of iron ore pellets

作     者：Hongyu Tian Deqing Zhu Jian Pan Congcong Yang Weiqun Huang Mansheng Chu Hongyu Tian;Deqing Zhu;Jian Pan;Congcong Yang;Weiqun Huang;Mansheng Chu

作者机构：School of MetallurgyNortheastern UniversityShenyang 110819China School of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China Ecological Geology Brigade of Jiangxi Geological BureauNanchang 330030China Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking(Ministry of Education)Shenyang 110819China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2023年第30卷第12期

页      面：2334-2346页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 080601[工学-冶金物理化学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52004339 and 52174329) the Fundamental Research Funds for the Central Universities,China(No.N2325031) the China Baowu Low Carbon Metallurgy Innovation Foundation(No.BWLCF202216) 

主　　题：iron ore pellet aluminum occurrence consolidation behavior element migration 

摘      要：With the intensified depletion of high-grade iron ores,the increased aluminum content in iron ore concentrates has become unavoidable,which is detrimental to the pelletization ***,the effect mechanism of aluminum on pellet quality must be *** this study,the influence of aluminum occurrence and content on the induration of hematite(H)and magnetite(M)pellets was investigated through the addition of corresponding Al-containing additives,including alumina,alumogoethite,gibbsite,and *** mineralogical analysis,combined with the thermodynamic properties of different aluminum occurrences and the quantitative characterization of consolidation behaviors,were conducted to determine the related *** results showed that the alumina from various aluminum occurrences adversely affected the induration characteristics of pellets,especially at an aluminum content of more than 2.0wt%.The thermal decomposition of gibbsite and kaolinite tends to generate internal stress and fine cracks,which hinder the respective microcrystalline bonding and recrystallization between *** adverse effect on the induration characteristics of fired pellets with different aluminum occurrences can be relieved to varying degrees through the formation of liquid phase bonds between the hematite *** is more beneficial to the induration process than the other three aluminum occurrences because of the formation of more liquid phase,which improves pellet *** research results can further provide insights into the effect of aluminum occurrence and content in iron ore concentrates on downstream processing and serve as a guide for the utilization of high-alumina iron ore concentrates in pelletization.