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中南大学学报(自然科学版)

Journal of Central South University

第42卷    第5期    总第201期    2011年5月

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文章编号:1672-7207(2011)05-1175-06
新生Fe2O3对磁铁精矿预热球团强度的影响
黄柱成,吕丽丽,朱良柱,姜涛

(中南大学 资源加工与生物工程学院,湖南 长沙,410083)

摘 要: 据磁铁精矿在空气及氮气气氛中预热的质量损失计算新生Fe2O3质量分数,研究预热温度、预热时间对新生Fe2O3质量分数的影响和新生Fe2O3质量分数对磁铁精矿预热球团抗压强度及转鼓强度的影响。研究结果表明:提高预热温度,预热球新生Fe2O3质量分数迅速增加,当Fe2O3质量分数超过50%后,其抗压强度迅速提高(大于400 N/个);同时,预热球中新生Fe2O3由邻近矿粒结晶向毗邻的氧化物体间扩散迁移并形成Fe2O3连接桥,球团强度迅速提高。

 

关键字: 磁铁精矿;球团;预热球强度;Fe2O3

Effect of neonatal Fe2O3 on preheated magnetite concentrate
pellets strength
HUANG Zhu-cheng, LÜ Li-li, ZHU Liang-zhu, JIANG Tao

School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China

Abstract:The mass fraction of neonatal Fe2O3 generated through the preheating process was calculated according to the mass loss of magnetite concentrate in air and neutral atmosphere. The effect of preheating temperature and time on the mass fraction of neonatal Fe2O3 and the impact of neonatal Fe2O3 mass fraction on compressive and drum strength of preheated pellets were discussed. The results show that improving the preheating temperature, the mass fraction of neonatal Fe2O3 and compressive strength of the preheated pellets increase rapidly when the mass fraction of neonatal Fe2O3 is more than 50%. Compressive strength is more than 400 N per pellet. The mode of neonatal Fe2O3 crystallization is transformed from crystallize between adjoining mineral particles to diffusive migration between adjacent oxide and form Fe2O3 connecting bridge, and the strength of preheated pellets increases rapidly.

 

Key words: magnetite concentrate; pellet; strength of preheated pellets; Fe2O3

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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