微波强化钒钛磁铁矿直接还原过程研究  

Research on microwave enhanced direct reduction of vanadium titano-magnetite

作　　者：赵涛 余少武 温靖 邹志雪 李林 姜涛 Zhao Tao;Yu Shaowu;Wen Jing;Zou Zhixue;Li Lin;Jiang Tao(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819

出　　处：《钢铁钒钛》2021年第4期105-110,共6页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金资助项目(51174051,51090383)。

摘　　要：以钒钛磁铁精矿为原料,直接还原工艺为基础,系统比较了不同加热方式对还原过程的影响。结果表明:与传统加热相比,微波加热能加快钒钛磁铁矿还原反应的进行,并且随温度升高效果越显著,在1350℃时铁金属化率可达到91.91%,提高了5.32个百分点;微波加热不会改变还原产物的物相组成,但使还原产物结构致密,气孔减少,晶粒粗大且分布均匀,脉石与金属铁嵌布紧密程度降低,相互之间夹杂的现象减少,有利于后续磨矿磁选过程中金属铁与脉石相的分离;另外,微波加热可以明显去除还原产物中P元素,而对于S元素的去除效果不显著,在1350℃时传统加热获得的产物中P含量为0.077%,S含量为0.29%,微波加热获得的产物中P含量为0.038%,S含量为0.28%。In this paper,the vanadium titano-magnetite concentrate was used as the raw material,and the influence of different heating methods on the reduction process was systematically compared based on the direct reduction process.The results show that compared with traditional heating,microwave heating can accelerate the reduction reaction of vanadium titano-magnetite,and the effect is more significant with the increase of temperature.At 1350℃,the metallization rate of iron can reach 91.91%,increased by 5.32%.Microwave heating does not change the phase composition of the reduction product,but make the reduction product structure compact,less pores,coarse grains and uniform distribution.In addition,microwave heating can obviously remove the P element in the reduction product,but the removal effect of the S element is not significant.When heating temperature is 1350℃,P and S contents in resulted product for tranditional process are 0.077%and 0.29%,respectively,while for microwave process those values are 0.038%and 0.28%,respectively.

关 键 词：钒钛磁铁矿 直接还原 微波加热 金属化率 

分 类 号：TF55[冶金工程—钢铁冶金]