Softening–melting behavior of mixed burden based on low-magnesium sinter and fluxed pellets  

作　　者：Gui-lin Wang Jian Kang Jian-liang Zhang Yao-zu Wang Zhi-yu Wang Zheng-jian Liu Chen-yang Xu 

机构地区：[1]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]School of Chemical Engineering,The University of Queensland,St Lucia,QLD 4072,Australia [3]Institute of Artificial Intelligence,University of Science and Technology Beijing,Beijing 100083,China [4]Baosteel Zhanjiang Iron and Steel Co.,Ltd.,Zhanjiang 524072,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2021年第4期621-628,共8页矿物冶金与材料学报（英文版）

基　　金：financially supported by the Fundamental Research Funds for the Central Universities, China (No.06500170);the Guangdong Basic and Applied Basic Research Foundation, China (No.2020A1515111008)。

摘　　要：A low MgO content in sinter is conducive to reduce the MgO content in blast furnace slag.This study investigated the effect of MgO content in sinter on the softening–melting behavior of the mixed burden based on fluxed pellets.When the MgO content increased from 1.31 wt% to 1.55 wt%, the melting temperature of sinter increased to 1521℃.Such an increase was due to the formation of the high-meltingpoint slag phase.The reduction degradation index of sinter with 1.31 wt% MgO content was better than that of others.The initial softening temperature of the mixed burden increased from 1104 to 1126℃ as MgO content in sinter increased from 1.31 wt% to 1.55 wt%, and the melting temperature decreased from 1494 to 1460℃.The permeability index(S-value) of mixed burden decreased to 594.46 kPa·℃ under a high MgO content with 1.55 wt%, indicating that the permeability was improved.The slag phase composition of burden was mainly akermarite(Ca_(2)MgSiO_(7)) when the MgO content in sinter was 1.55 wt%.The melting point of akermarite is 1450℃, which is lower than other phases.

关 键 词：MAGNESIA softening–melting behavior low-magnesium sinter fluxed pellets slag 

分 类 号：TF53[冶金工程—钢铁冶金]