Effect of oxygen enrichment on sintering behavior of high proportion vanadium-titanium magnesite concentrates  

作　　者：Shi-hong Peng Hao Liu Ze-zheng Sun Chang-wei Li Yue-lin Qin Wei-qiang Liu Guang Wang 

机构地区：[1]School of Metallurgy and Materials Engineering,Chongqing University of Science and Technology,Chongqing,401331,China [2]Value-Added Process and Clean Extraction of Complex Metal Mineral Resources,Chongqing Municipal Key Laboratory of Institutions of Higher Education,Chongqing,401331,China [3]Chongqing Chuanyi Automation Co.,Ltd.,Chongqing,401120,China [4]Process and Systems Engineering,Åbo Akademi University,Åbo,20500,Finland [5]Department of Materials Science and Engineering,McMaster University,Ontario,L8S 4L7,Canada

出　　处：《Journal of Iron and Steel Research International》2023年第11期2122-2132,共11页

基　　金：funded by the National Natural Science Foundation of China(Nos.51974054 and 52174300);Natural Science Foundation of Chongqing,China(No.cstc2020jcyj-msxmX0583).

摘　　要：To achieve high-efficiency utilization of complex and unmanageable iron-containing minerals,the effects of oxygen enrichment on productivity,yield,flame front speed,exhaust gas peak temperature,and desulphurization reaction of the vanadium-titanium magnetite sintering process as well as sinter tumble index and mineralogy were clarified,with oxygen enrichment concentrations ranging from 21 to 29 vol.%.Results indicated that with increasing the oxygen enrichment concentration from 21 to 27 vol.%,the flame front speed increased from 30.3 to 40.0 mm min^(-1),the yield enhanced from 72%to 77%,and the productivity augmented from 1.83 to 2.67t m^(-2)h^(-1);in the meantime,the tumble index was improved from 73.7%to 77.9%,and the exhaust gas peak temperature rose from 376.4 to 484.8℃.The main reason for the improvement in sintering properties was the increased combustibility of fuels and the generation of proper liquid phase that improved the permeability of the packed bed.The improved sinter strength is mainly due to the increase in the phase fraction of silico-ferrites of calcium and aluminium.In addition,oxygen enrichment sintering could significantly increase the desulphurization level of vanadium-titanium magnetite sinter and the rate of desulphurization reaction during sintering process.

关 键 词：SINTER Oxygen enrichment Vanadium-titanium magnetite Sintering behavior 

分 类 号：TF046[冶金工程—冶金物理化学]