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 (3): 388-391.DOI: -

• 材料与冶金 • 上一篇    下一篇

含铁粉尘碳酸化球团孔的结构特性

张玉柱1，石焱1,2，胡长庆2，韩涛2   

  1. (1东北大学材料与冶金学院，辽宁沈阳110819；2河北联合大学冶金与能源学院，河北唐山063009)
  • 收稿日期:2012-09-17 修回日期:2012-09-17 出版日期:2013-03-15 发布日期:2013-01-26
  • 通讯作者: 张玉柱
  • 作者简介:张玉柱(1956-)，男，河北沧州人，河北联合大学教授，东北大学博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51074061)；河北省自然科学基金-钢铁联合基金资助项目(E2011209039).

Research on Pore Structure Characteristics of Carbonation Pellets with Ferrous Dust

ZHANG Yuzhu1， SHI Yan1,2， HU Changqing2， HAN Tao2   

  1. 1. School of Materials ＆ Metallurgy， Northeastern University， Shenyang 110819， China; 2. College of Metallurgy ＆ Energy， Hebei United University， Tangshan 063009， China.
  • Received:2012-09-17 Revised:2012-09-17 Online:2013-03-15 Published:2013-01-26
  • Contact: SHI Yan
  • About author:-
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摘要： 通过压汞法测量研究了不同CaO含量、不同造球时间的生球以及不同反应温度、不同CO2分压条件下固结生成的碳酸化球团的孔隙结构特征.结果表明:随着CaO含量增加和造球时间延长，生球的平均孔径、显孔隙度、临界孔径和最可几孔径都相应有所降低，生球凝胶孔含量随CaO含量增加而升高，孔隙比表面积增大，利于反应进行的10~300nm孔隙数量增多.优化反应温度、提高CO2分压，有利于促进球团CaCO3微晶大量生成，细化孔径，形成连接桥，冷固结强度显著提高.

关键词: 含铁粉尘, 生球, 碳酸化球团, 孔结构, 压汞仪

Abstract: The pore structure characteristics of green pellets formed with different CaO contents and under different pelletizing times and of carbonation pellets consolidated at different reaction temperatures and under different CO2 partial pressures were researched by the mercury intrusion method. The results showed that with the increase of the CaO content and the pelletizing time， the average pore size， porosity， the critical pore diameters and the most probable pore size correspondingly reduced. With the increase of the CaO content， the number of the gel pore increased， the specific surface area of the pores and the number of pores with 10~300nm in diameter which were beneficial for the the reaction also increased. Optimizing the reaction temperature and improving CO2 partial pressure favored accelerating the CaCO3 microlite formation greatly， shrinking the pore size， forming the bonded bridge， and improving the cold bound strength of the carbonation pellets.

Key words: ferrous dust, green pellets, carbonation pellets, pore structure, mercury intrusion porosimetry

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