Optimization of iron ore blending based on replacing Australian low alumina limonite  

作　　者：Bin Li Heng Zhou Jian Huang Zong-wang Zhang Xue-feng She Jian-fang Wang Sheng-li Wu Ming-yin Kou 

机构地区：[1]State Key Laboratory of Advanced Metallurgy,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]Shougang Jingtang Iron and Steel Co.,Ltd.,Tangshan 063200,Hebei,China [3]Key Laboratory of Knowledge Automation for Industrial Processes of Ministry of Education,School of Automation and Electrical Engineering,University of Science and Technology Beijing,Beijing 100083,China [4]Delong Iron and Steel Co.,Ltd.,Xingtai 054009,Hebei,China

出　　处：《Journal of Iron and Steel Research International》2023年第9期1675-1686,共12页

基　　金：The authors would like to thank the the National Key Research and Development Program of China(Grant Nos.2021YFC2902400 and 2021YFC2902404);the National Natural Science Foundation of China(Grant Nos.51904023 and 51804027).

摘　　要：Mauritanian iron ore powder(OM)has advantages of high iron grade,low aluminum content,and low loss on ignition,which can be used as a new mineral to replace low alumina limonite that has been exhausted in Australia.However,it will have a certain negative impact on sintering because of its high SiO_(2) content.The mechanism of SiO_(2) content affecting the sintering behavior was first studied through FactSage 7.2.Then,the liquid fluidity,penetration,and high-temperature performance of different iron ore powders were compared.Finally,the optimization of ore blending structure was studied by the micro-sintering method and the sinter pot test.The results show that the increase in SiO_(2) content can reduce the assimilation temperature.The low penetration of OM can lead to an increase in the amount of liquid,and the high SiO_(2) content of OM increases the viscosity of the liquid phase.What is more,the increase in SiO_(2) also increases the formation of silicate and fayalite phase and inhibits the formation of silico-ferrite of calcium and aluminum(SFCA).To optimize ore blending structure,OM and the low SiO_(2) powder OD from Australia were used together,which improves the content of SFCA by 2.04%and decreases the contents of calcium silicate and fayalite by 0.63%and 4.99%,respectively.The results of the sinter pot test indicated that the properties of sinter have been improved.

关 键 词：Mauritanian iron ore powder Liquid fluidity Penetration Mineral composition Sintering Ore blending Low alumina limonite 

分 类 号：TF0[冶金工程—冶金物理化学]