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| Effect of Canadian iron concentrate on bonding strength of sinter body and thereof improvement method |
| ZHAI Xiaobo,WU Shengli,QUE Zhigang |
(School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,
Beijing 100083, China) |
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Abstract The Canadian iron concentrate has a high ferrous grade and low contents of gangue and harmful elements, which provides a favorable condition for its use during the sintering process. The effect of the iron concentrate on the bonding strength of the sinter body and the influencing mechanism were investigated through the microsintering method. The liquid phase fluidity of the fines and the liquid absorbability of the coarse particles were studied on four kinds of iron ore fines. Based on this, the improvement method for the bonding strength of sinter body was explored and verified via bonding tests. The results show that blending the iron concentrate in ore blends decreases the separation basicity of adhering fines and weakens the liquid phase fluidity, hence deteriorating the bonding strength of the sinter body. Highsilica iron ore fines have a high liquid phase fluidity of the fines under a fixed basicity, and the lowporosity iron ore fines weaken the liquid absorbability of the coarse particles. Under blending the iron concentrate in ore blends, using the high liquid phase fluidity iron ore fines, weak liquid absorbability iron ore fines, and largeparticle divided adding for strong liquid absorbability iron ore fines can effectively improve the bonding strength of the sinter body.
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| [1] |
MA Xu-dong,WU Sheng-li,ZHAI Xiao-bo,SU Li-xin,LV Xu-dong. Effect of a high alumina Australia ore on fluidity and brittle minerals of sintering bonding phase[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(11): 963-970. |
| [2] |
SONG He-kai，WU Sheng-li，QUE Zhi-gang，ZHOU Heng. Effect of ratio of hematite concentrate on strength of sinter[J]. Iron and Steel, 2019, 54(1): 8-13. |
| [3] |
WU Sheng- li,BEI Ji- cheng,ZHU Juan,SU Bo,HUANG Wei. Influence of chemical composition on liquid fluidity of ferrite[J]. Chinese Journal of Iron and Steel, 2015, 27(9): 7-13. |
| [4] |
CHEN Shao-guo，WU Sheng-li，ZHANG Guo-liang，ZHU Juan，FAN Jia-xin， SU Bo. Blending Structure of Iron Ore for Dolomite Substitute Serpentine in Sintering Process[J]. Iron and Steel, 2014, 49(5): 24-29. |
| [5] |
LI Jian-chao，YI Feng-yong，LI Fu-min，SUN Kai，L Qing. Sintering Basic Characteristics of Blending Iron Ore[J]. Iron and Steel, 2013, 48(5): 7-10. |
| [6] |
LIU Cheng-song，,LI Jing-she,GAO Ya-wei, ,TANG Hai-yan，. Experiment on the Sintering Proportioning Optimization[J]. Iron and Steel, 2013, 48(10): 6-11. |
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