Effect of titanium on the sticking of pellets based on hydrogen metallurgy shaft furnace:Behavior analysis and mechanism evolution  

作　　者：Jinge Feng Jue Tang Zichuan Zhao Mansheng Chu Aijun Zheng Xiaobing Li Xiao’ai Wang 

机构地区：[1]School of Metallurgy,Northeastern University,Shenyang 110819,China [2]Institute for Frontier Technologies of Low-carbon Steelmaking,Northeastern University,Shenyang 110819,China [3]Liaoning Low-carbon Steelmaking Technology Engineering Research Center,Northeastern University,Shenyang 110819,China [4]Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking(Ministry of Education,Shenyang 110819,China [5]Zhang Xuan Technology of HBIS Group Co.,Ltd.,Shijiazhuang 050000,China [6]Xuanhua Iron and Steel Group Co.,Ltd.,Shijiazhuang 050000,China [7]Iron and Steel Research Institute of HBIS Group Co.,Ltd.,Shijiazhuang 050000,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第2期282-291,共10页矿物冶金与材料学报（英文版）

基　　金：the National Natural Science Foundation of China(No.51904063);the Science and Technology Plan Project of Liaoning Province,China(No.2022JH24/10200027);the Key Research and Development Project of Hebei Province,China(No.21314001D);the seventh batch of the Ten Thousand Talents Plan(No.ZX20220553).

摘　　要：Direct reduction based on hydrogen metallurgical gas-based shaft furnace is a promising technology for the efficient and low-carbon smelting of vanadium-titanium magnetite.However,in this process,the sticking of pellets occurs due to the aggregation of metal-lic iron between the contact surfaces of adjacent pellets and has a serious negative effect on the continuous operation.This paper presents a detailed experimental study of the effect of TiO2 on the sticking behavior of pellets during direct reduction under different conditions.Results showed that the sticking index(SI)decreased linearly with the increasing TiO2 addition.This phenomenon can be attributed to the increase in unreduced FeTiO3 during reduction,leading to a decrease in the number and strength of metallic iron interconnections at the sticking interface.When the TiO2 addition amount was raised from 0 to 15wt%at 1100°C,the SI also increased from 0.71%to 59.91%.The connection of the slag phase could be attributed to the sticking at a low reduction temperature,corresponding to the low sticking strength.Moreover,the interconnection of metallic iron became the dominant factor,and the SI increased sharply with the increase in re-duction temperature.TiO2 had a greater effect on SI at a high reduction temperature than at a low reduction temperature.

关 键 词：TITANIUM sticking index hydrogen metallurgy direct reduction PELLETS 

分 类 号：TF19[冶金工程—冶金物理化学]