Infiltration behavior of sintering liquid on nuclei ores during low-titanium ore sintering process  

作　　者：Dong-hui Liu Jian-liang Zhang Xun Xue Guang-wei Wang Ke-jiang Li Zheng-jian Liu 

机构地区：[1]School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing

出　　处：《International Journal of Minerals,Metallurgy and Materials》2016年第6期618-626,共9页矿物冶金与材料学报（英文版）

基　　金：financially supported by the Major State Basic Research Development Program of China (No. 2012CB720401);the Natural Science Foundation of China and Baosteel (No. 51134008);the National Natural Science Foundation of China (No. U1260202)

摘　　要：Sinter strength is dependent not only on the self-intensity of the residual rude and bonding phase but also on the bonding degree between them. The infiltration behavior of sintering liquid on nuclei ores influences the bonding degree, which ultimately determines the sinter strength. Infiltration tests were conducted using micro-sinter equipment. The infiltration area index of original liquid（IAO）, infiltration volume index of secondary liquid（IVS）, and sinter body bonding strength（SBS） were proposed to study the melt infiltration behavior. The results show that the IVS first increases and then decreases with increasing TiO2 content in adhering fines, whereas the IAO exhibits the opposite behavior. Compared with the original liquid, the secondary liquid shows lower porosity, smaller pores, and more uniform distribution. The SBS increases first and then decreases with increasing IAO and TiO2 content, and reaches a maximum when the IAO and TiO2 contents are approximately 0.5 and 2.0wt%, respectively. The SBS first increases and then tends to be stable with increasing IVS. The TiO2 content is suggested to be controlled to approximately 2.0wt% in low-titanium ore sintering.Sinter strength is dependent not only on the self-intensity of the residual rude and bonding phase but also on the bonding degree between them. The infiltration behavior of sintering liquid on nuclei ores influences the bonding degree, which ultimately determines the sinter strength. Infiltration tests were conducted using micro-sinter equipment. The infiltration area index of original liquid（IAO）, infiltration volume index of secondary liquid（IVS）, and sinter body bonding strength（SBS） were proposed to study the melt infiltration behavior. The results show that the IVS first increases and then decreases with increasing TiO2 content in adhering fines, whereas the IAO exhibits the opposite behavior. Compared with the original liquid, the secondary liquid shows lower porosity, smaller pores, and more uniform distribution. The SBS increases first and then decreases with increasing IAO and TiO2 content, and reaches a maximum when the IAO and TiO2 contents are approximately 0.5 and 2.0wt%, respectively. The SBS first increases and then tends to be stable with increasing IVS. The TiO2 content is suggested to be controlled to approximately 2.0wt% in low-titanium ore sintering.

关 键 词：titanomagnetite vanadium ore treatment ore sintering infiltration 

分 类 号：TF046.4[冶金工程—冶金物理化学] TD862.7[矿业工程—金属矿开采]