微波加热含碳氧化锰矿粉体还原过程中锰铁金属化物的渗碳行为  

Carburization of Sponge Ferromanganese for Manganese Oxide Fines Containing Coal by Microwave Heating

作　　者：宋平伟[1] 陈津[1] 潘小娟[1] 李明照[1] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《中国锰业》2009年第2期15-19,共5页China Manganese Industry

基　　金：国家自然科学基金资助项目(50674069)

摘　　要：纯净锰铁对纯净钢质量的影响至关重要，尤其是碳含量。微波可以快速加热含碳氧化锰矿粉进行体还原，为获得低碳锰铁奠定了基础。在碳氧原子摩尔比为1．06，rCaO：rSiO2分子摩尔比为1．28的条件下，采用微波加热法，对含碳氧化锰矿粉加热到一定温度并保温一定时间。结果表明：还原物料中锰铁金属化物的碳含量在0．11％～0．23％之间。随着物料温度的提高和保温时间的增加，锰铁金属化物中的碳含量随铁含量增加而提高，而随锰含量的增加而降低，但锰含量与铁含量呈负相关关系。由于铁比锰易于渗碳，因此物料温度、保温时间和物料的锰铁比是影响锰铁金属化物渗碳的主要因素。It is very important that the carburizing of manganese oxide ore fines containing coal will be voluminally reduced by microwave heating. The results showed that, at the certain microwave heating power, material mass and a carbon ratio, because the significant advantages as microwave voluminal heating, strong absorptivity to microwave for manganese dioxide and anthracite fines, and catalysis by alkaline metal in materials, the manganese oxide ore fines containing coal could be reduced by higher reduction rate at lower temperature after rising to 1 000℃, 1 100℃ ,and 1 200℃ ,and holding different isothermal time respectively. Avoided to produce mass manganese-carbide at higher reduction temperature and long heating time,it can reduce the carbon content of ferromanganese metallide.

关 键 词：微波加热 含碳氧化锰矿粉 锰铁金属化物 渗碳 

分 类 号：TF642[冶金工程—钢铁冶金]