东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (4): 542-544.DOI: -

• 材料与冶金 • 上一篇    下一篇

轻烧菱镁石对生球爆裂温度的影响

高强健，魏国，姜鑫，沈峰满   

  1. (东北大学材料与冶金学院，辽宁沈阳110819)
  • 收稿日期:2012-11-29 修回日期:2012-11-29 出版日期:2013-04-15 发布日期:2013-06-19
  • 通讯作者: 高强健
  • 作者简介:高强健(1987-)，男，辽宁阜新人，东北大学博士研究生；沈峰满(1958-)，男，黑龙江密山人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51074040).

Effect of Calcinated Magnesite on Burst Temperature of Green Pellet

GAO Qiangjian， WEI Guo， JIANG Xin， SHEN Fengman   

  1. School of Materials ＆ Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2012-11-29 Revised:2012-11-29 Online:2013-04-15 Published:2013-06-19
  • Contact: GAO Qiangjian
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摘要： 在850℃条件下，对菱镁石进行焙烧、磨细处理后获得轻烧菱镁石粉末.将该粉体作为黏结剂用于球团矿生产，研究考察了轻烧菱镁石对生球爆裂温度的影响.结果表明，随着轻烧菱镁石质量分数的增加，生球爆裂温度逐渐增大，当轻烧菱镁石质量分数由0增至20%时，爆裂温度最大增幅可达200℃.主要原因如下:由于该黏结剂的加入，生球内部水分蒸发速率减小，生球内部产生的蒸汽压相对较小，同时，该黏结剂可使生球在干燥过程强度迅速提升，这使得生球爆裂温度逐渐增大.

关键词: 轻烧菱镁石, 生球, 爆裂温度, 失水速率, 强度

Abstract: The powder of calcinated magnesite was obtained by calcinating(850℃) and grinding process. The power was utilized as a binding additive to produce green pellets. The effect of the calcinated magnesite on the burst temperature of the green pellets was investigated. The results showed that the burst temperature of the green pellets increased gradually with the increase of the mass fraction of the calcinated magnesite in the green pellets. When the mass fraction of the calcinated magnesite increased from 0% to 20%， the largest increase of the burst temperature was up to 200℃. The main reasons were as follows:with the addition of the binding additive (calcinated magnesite)， the speed of waterevaporation within the green pellets decreased which led the vapor pressure of inside the green pellets to be relatively small， and the strength of the green pellets increased rapidly in the drying process， which lead the burst temperature of the green pellets increased gradually.

Key words: calcinated magnesite, green pellet, burst temperature, dehydration ratio, strength

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