东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (7): 960-963.DOI: 10.12068/j.issn.1005-3026.2016.07.011

• 材料与冶金 • 上一篇    下一篇

硅热法炼镁预制球团成球过程的研究

文明， 张廷安， 豆志河   

  1. (东北大学 多金属共生矿生态化利用教育部重点实验室， 辽宁 沈阳110819)
  • 收稿日期:2015-05-05 修回日期:2015-05-05 出版日期:2016-07-15 发布日期:2016-07-13
  • 通讯作者: 文明
  • 作者简介:文明(1982-)，男，内蒙古赤峰人，东北大学博士研究生； 张廷安(1960-)，男，河南周口人，东北大学教授，博士生导师.
  • 基金资助:
    辽宁省科技创新团队项目(LT2010034)； 国家科技支撑计划项目(2012BAE01B02-2)； 国家重点基础研究发展计划项目(2013CB632606-2).

Experimental Study on Pelletizing Process of Prepared Pellets for Silicothermic Magnesium Production

WEN Ming， ZHANG Ting-an， DOU Zhi-he   

  1. Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores，Ministry of Education， Northeastern University， Shenyang 110819， China.
  • Received:2015-05-05 Revised:2015-05-05 Online:2016-07-15 Published:2016-07-13
  • Contact: ZHANG Ting-an
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摘要： 为改变硅热法炼镁工艺存在资源利用率低、能耗高等缺陷，提出了造球→煅烧→还原硅热法炼镁新工艺.为了控制炼镁预制球团生球的成长，主要研究了白云石球团生球的成长特性，考察了影响球团成形的影响因素.结果表明:间断造球过程中，生球的长大主要以聚结机理进行，连续造球过程中，生球的长大主要以成层机理进行；白云石预制球团生球的成长率随原料含水量的增加而增加；随着高岭土用量的增加，生球成长率上升；原料进行湿混或干混，对生球的成长行为产生不同影响，随着水分含量的增加，其生球成长速度也相应增加.

关键词: 白云石, 制团, 成球机理, 成球动力学, 成长率

Abstract: The magnesium preparation process of silicothermic reduction exists the problems of high energy consumption and high cost. Focusing on these disadvantages， a new technology of pellet preparation→calcination→reduction was proposed. In order to control the growth of prepared pellets for silicothermic reduction process， the pelletizing growth characteristics of dolomite pellet and the influence factors on the forming process of pellets are studied. The results indicate that the growth of the pellets mainly follows the coalescence mechanism in the discontinuous pelletizing process. The growth of the pellets mainly follows the stratification mechanism in the continuous pelletizing process. The growth rate of the prepared dolomite pellets increases with the increase of the moisture content in raw materials. With the increasing of kaolin addition， the growth rate of pellet increases. In addition， grinding method has an effect on the growth behavior of pellets. With the increase of moisture content， the growth rate of pellets also increases accordingly.

Key words: dolomite, briquetting, pellets forming mechanism, pellets formation dynamics, growth rate

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