Advertisement

Granule size distribution and porosity of granule packing

  • Shu-hua Dai
  • Feng-man Shen
  • Ai-bing Yu
Article

Abstract

The granule size distribution and the porosity of the granule packing process were researched. For realizing the optimizing control of the whole sintering production process, researchers must know the factors influencing the granule size distribution and the porosity. Therefore, tests were carried out in the laboratory with regard to the influences of the size and size distribution of raw materials and the total moisture content on the size and size distribution of granule. Moreover, tests for finding out the influences of the moisture content and the granule volume fraction on the porosity were also carried out. The results show that (1) the raw material has little influence on granulation when its size is in the range of 0.51 mm to 1.0 mm; (2) the influence of the material size on granule size plays a dominant role, and in contrast, the moisture content creates a minor effect on granule size; (3) in binary packing system, with the increase in the constituent volume fraction, the porosity initially increases and then decreases, and there is a minimum value on the porosity curve of the binary mixture system; (4) the minimum value of the porosity in binary packing system occurs at different locations for different moisture contents, and this value shifts from right to left on the porosity curve with increasing the moisture content; (5) the addition of small granules to the same size component cannot create a significant influence on the porosity, whereas the addition of large granules to the same system can greatly change the porosity.

Key words

granule raw material size distribution granulation granule packing porosity 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Yu A B, Standish N. Porosity Calculations of Multi-Component Mixtures of Spherical Particles [J]. Powder Technology, 1987, 52(3): 233.CrossRefGoogle Scholar
  2. 2.
    Yu A B, Standish N, An Analytical-Parametric Theory of the Random Packing of Particles [J]. Powder Technology, 1988, 55(3): 171.CrossRefGoogle Scholar
  3. 3.
    Yu A B, Standish N. Estimation of the Porosity of Particle Mixtures by a Linear-Mixture Packing Model [J]. Industrial and Engineering Chemical Research, 1991, 30(6): 1372.CrossRefGoogle Scholar
  4. 4.
    Yu A B. A Study of the Packing of Particles With a Mixture Size Distribution [J]. Powder Technology, 1993, 76(2): 113.CrossRefGoogle Scholar
  5. 5.
    Yu A B, Gu Z H. Characterization of the Porosity-Pressure Relation of Cohesionless Powders [J]. Advanced Powder Technology, 1993, 4(3): 199.CrossRefGoogle Scholar
  6. 6.
    Yu A B, Zou R P, Standish N, et al. Effect of Particle Size Distribution on Porosity of Packed Particles [J]. Journal of the American Ceramic Society, 1998, 31(5): 457.Google Scholar
  7. 7.
    Zou R P, Yu A B. Wall Effect on the Packing of Spheres in a Cylindrical Container [J]. Chemical Engineering Science, 1996, 51(8): 1177.Google Scholar
  8. 8.
    Pinson D, Zou R P, Yu A B, et al. Coordination Number of Binary Mixtures of Spheres [J]. Journal of Physics D: Applied Physics, 1998, 31(4): 457.CrossRefGoogle Scholar
  9. 9.
    Litster J D, Waters A G, Nicol S K. A Model for Predicting the Size Distribution of Product From a Granulating Drum [J]. Trans ISIJ, 1986, 26(9): 1036.CrossRefGoogle Scholar
  10. 10.
    Yu A B, Standish N, Lu L. Coal Agglomeration and Its Effect on Bulk Density [J]. Powder Technology, 1995, 82 (2): 177.CrossRefGoogle Scholar
  11. 11.
    Waters A G, Litster J D, Nicol S K. A Mathematical Model for the Prediction of Granule Size Distribution for Multi-Component Sinter Raw Material [J]. ISIJ International, 1989, 29 (4): 274.CrossRefGoogle Scholar
  12. 12.
    Kapur P C, Kapur P, Fuerstenau D W. An Auto-Layering Model for the Granulation of Iron Ore Fines [J]. International Journal of Mineral Processing, 1993, 39(3): 239.CrossRefGoogle Scholar
  13. 13.
    ZHANG Yi-min. Pellet Theory and Technology [M]. Beijing: Metallurgical Industry Press, 2002 (in Chinese).Google Scholar
  14. 14.
    Heim A, Antkowiak W. A Mathematical Model for Granulation Kinetics [J]. Chemical Engineering Science, 1988, 43 (7): 1447.CrossRefGoogle Scholar
  15. 15.
    Kapur P C, Runkana V. Balling and Granulation Kinetics Revisited [J]. Int J Miner Process, 2003, 72(1–4): 417.CrossRefGoogle Scholar
  16. 16.
    Adetayo A A, Litster J D, Desai M. The Effect of Process Parameters on Drum Granulation of Fertilizers With Broad Size Distributions [J]. Chemical Engineering Science, 1993, 48(23): 3951.CrossRefGoogle Scholar

Copyright information

© China Iron and Steel Research Institute Group 2008

Authors and Affiliations

  1. 1.School of Materials and MetallurgyNortheastern UniversityShenyang, LiaoningChina
  2. 2.School of Raw Material Science and EngineeringUniversity of New Southern WalesSydneyAustralia

Personalised recommendations