东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (3): 370-374.DOI: 10.12068/j.issn.1005-3026.2017.03.014

• 材料与冶金 • 上一篇    下一篇

轻烧菱镁石制备与表征及其对球团生球质量的影响

高强健, 姜鑫, 沈峰满, 刘常升   

  1. (东北大学 冶金学院, 辽宁 沈阳110819)
  • 收稿日期:2015-10-20 修回日期:2015-10-20 出版日期:2017-03-15 发布日期:2017-03-24
  • 通讯作者: 高强健
  • 作者简介:高强健(1987-),男,辽宁阜新人,东北大学讲师,博士; 沈峰满(1958-),男,黑龙江密山人,东北大学教授,博士生导师; 刘常升(1963-),男,内蒙古奈曼旗人,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(51604069); 国家自然科学基金-辽宁联合基金资助项目(U1508213); 中国博士后科学基金资助项目(2016M591445); 中央高校基本科研业务费专项资金资助项目(N162504004).

Preparing and Characterization for Caustic Calcined Magnesite and Its Effect on Quality of Green-Pellets

GAO Qiang-jian, JIANG Xin, SHEN Feng-man, LIU Chang-sheng   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2015-10-20 Revised:2015-10-20 Online:2017-03-15 Published:2017-03-24
  • Contact: SHEN Feng-man
  • About author:-
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摘要: 以轻烧菱镁石作为造球用添加剂,考察了不同制备条件下轻烧菱镁石性质的变化以及其活性对球团生球质量的影响.研究表明:焙烧温度过低或时间过短,菱镁石分解不完全,水化活性相对较低,焙烧温度过高或时间过长同样容易破坏轻烧菱镁石活性. 其中,800~850℃下焙烧获得的轻烧菱镁石具有较好的性质(活性、粒级、比表面积以及晶粒尺寸);高活性的轻烧菱镁石对改善生球抗压强度(CSGP/N)、生球落下强度(DS/次数),提高生球爆裂温度(tb/℃)效果明显,其中,爆裂温度(tb/℃)最大增幅可达150℃.

关键词: 菱镁石, 添加剂, 生球, 活性, 比表面积

Abstract: Caustic calcined magnesite was utilized as an additive for pellets. The charterers of caustic calcined magnesite and the effects of activity on the quality of green-pellets were analyzed when the magnesite was calcined in different conditions. The results showed that when the calcined temperature is lower or the calcined time is inadequate, the decomposition of magnesite is limited and the hydration activity is lower, while the calcined temperature is much higher or the calcined time is much longer, the activity is destroyed. In 800~850℃, the caustic calcined magnesite has good characteristics such as high hydration activity, small granularity, large specific surface area and small average diameter of crystal grain. Caustic calcined magnesite with high activity can improve the dropped strength (DS/Times) and compressive strength of green-pellet(CSGP/N), and can enhance the burst temperature of green-pellet(tb/℃), especially, the burst temperature(tb/℃)can be increased up to 150℃.

Key words: magnesite, additive, green-pellet, activity, specific surface area

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