微型流化床测定菱铁矿磁化焙烧固体产物特性的演变过程  

Evolution Process of the Properties of Solid Products Produced by Siderite Magnetization Roasting Reaction in Micro Fluidized Bed

作　　者：张虹 刘雪景 ZHANG Hong;LIU Xue-jing(Key Laboratory of Resources Chemicals and Materials of Ministry of Education,Institute of Industrial Chemistry and Energy Technology,Shenyang University of Chemical Technology,Shenyang Liaoning 110142,China)

机构地区：[1]沈阳化工大学能源与化工产业技术研究院资源化工与材料教育部重点实验室,辽宁沈阳110142

出　　处：《当代化工》2023年第4期801-805,共5页Contemporary Chemical Industry

基　　金：辽宁省自然科学基金(项目编号:2020-MS-231)。

摘　　要：利用具有在线颗粒取样功能的微型流化床反应分析仪(MFBRA-P),研究了惰性气氛下菱铁矿磁化焙烧反应过程中固体产物的物相组成、孔隙结构以及磁性的瞬态变化过程。结果表明:菱铁矿于600℃时完全分解,分解过程为先经分解反应生成FeO,FeO再经过磁化反应生成最终产物Fe3O4;焙烧产物的孔体积和比表面积随焙烧温度的增加以及反应的进行均呈现先增大后减小的趋势,并在600℃时出现最大值(3.03 cm^(3)·g^(-1)和13.19 m^(2)·g^(-1));焙烧产物的饱和磁强度随反应的进行大幅度增加,但当反应结束后即温度高于600℃时,焙烧产物的饱和磁强度几乎不变。The transient changes of the phase composition,pore structure and magnetism of solid products during the process of siderite magnetization roasting in inert atmosphere were studied by micro fluidized bed reaction analyzer(MFBRA-P)with on-line particle sampling system.It was shown that the siderite was completely decomposed at 600℃.The intermediate product of FeO was firstly generated by the decomposition reaction of siderite,and the final product of Fe_(3)O_(4) was generated through magnetization reaction of FeO.As the temperature increased and the reaction proceeded,the pore volume and specific surface area of the solid products increased first and then decreased,and reached the maximum of 3.03 cm^(3)·g^(-1)and 13.19 m^(2)·g^(-1)at 600℃,respectively.The saturation magnetization of the roasted product increased significantly with the increase of temperature,but almost unchanged when the temperature was higher than 600℃,which showed that the reaction was completed.

关 键 词：微型流化床 菱铁矿 磁化焙烧 焙烧温度 焙烧产物 

分 类 号：TQ013.2[化学工程]