磁铁精矿冷固球团弱还原气氛下的低温还原

来源期刊：中南大学学报(自然科学版)1998年第1期

论文作者：周红 陈启元 张平民 邱冠周 姜涛

文章页码：25 - 27

关键词：冷固球团;还原;内部结构;热重

Key words：cold bond pellet; reduction; inner structure; thermogravimetry

摘    要：在慢速升温和快速升温下，采用热重法及间隙法取样 检测研究了磁铁精矿冷固球团在还原前期升温过程中的还原，对弱还原气氛下球团内部结构变化规律进行了探索性研究．结果表明：在升温过程中，当温度小于900℃时，煤与球团的还原只在球团外层进行，而采用快速升温可以缩短跨越FeO阶段的时间且能使铁尽快产生，有利于球团形成较大的强度．这说明了快速升 温以及还原应尽量在较高温度下开始进行的必要性．

Abstract: At slow heating rate and rapid heating rate, the reduction of cold bond pellets of magnetite concentrate during the early period of heating up reduction process was studied by sample detection at regular intervals and thermogravimetric method. The inner structure change of pellets under the weak reductive condition was investigated. Results show that the reduction of pellets with coal only occurs at the outside layer of pellets, and Fe appears earlier at rapid heating rate than at slow heating rate. So it is necessary to take rapid heating rate and begin reduction at high temperature.