Journal of Northeastern University ›› 2013, Vol. 34 ›› Issue (3): 388-391.DOI: -

• Materials & Metallurgy • Previous Articles     Next Articles

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:-
  • Supported by:
    -

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

CLC Number: