Some basic properties of granules from ore blends consisting of ultrafine magnetite and hematite ores

作     者：Cong-cong Yang De-qing Zhu Jian Pan Yue Shi 

作者机构：School of Minerals Processing and BioengineeringCentral South University 

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：2019年第26卷第8期

页      面：953-962页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 

基　　金：Financial supports from the National Torch Program of China (No.2011GH561685) Hunan Provincial Co-innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources are sincerely acknowledged 

主　　题：iron ore granule adhering layer magnetite concentrate sinter basicity 

摘      要：Some basic properties of granules,including the granule size distribution,packed-bed permeability,and chemical composition of the adhering layer,were investigated in this study for four iron ore blends consisting of 5wt%,25wt%,and 45wt%ultrafine magnetite and 25wt%ultrafine hematite *** effects of varying the sinter basicity(CaO/SiO2 mass ratio=1.4 to 2.2)and adding ultrafine concentrates on the variation of the adhering-layer composition and granule microstructure were ***,the effect of adhering-layer compositional changes on sintering reactions was discussed in combination with pot sintering results of ore *** sinter basicity led to an increase in the basicities of both the adhering layer and the fine part of the sinter mix,which were higher than the overall sinter *** the sinter chemistry was fixed and fine Si-bearing materials(e.g.,quartz sand)were used,increasing the amount of ultrafine ores in the ore blends tended to reduce the adhering-layer basicity and increase the SiO2 content in both the adhering layer and the fine part of the sinter mix,which will induce the formation of low-strength bonding phases and the deterioration of sinter *** adhering-layer composition in granules can be estimated in advance from the compositions of the-1 mm fractions of the raw materials.