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Transport in Porous Media

, Volume 107, Issue 2, pp 365–385 | Cite as

Problems of Evolving Porous Media and Dissolved Glauberite Micro-scopic Analysis by Micro-Computed Tomography: Evolving Porous Media (1)

  • Yangsheng Zhao
  • Dong Yang
  • Zhonghua Liu
  • Zengchao Feng
  • Weiguo Liang
Article

Abstract

In this study, the evolution phenomena and mechanism of porous media were analyzed according to the driving factors, i.e., external force, heat, seepage, coupled chemical reaction and seepage, coupled chemical reaction and heat flow, and live porous media. According to the evolution mechanism, the evolution can be categorized as natural evolution, artificial evolution, and natural–artificial evolution. Taking the dissolution of glauberite ore as the example, the detailed evolution characteristics and behavior were investigated. The evolution characteristics of pores and the residual porous skeleton were investigated using micro-computed tomography. The results indicate that (1) The variation of the dissolution thickness of glauberite with time follows a power function. (2) The total void ratio of the residual porous media remains almost the same and is typically in a range of 20–22 %. The diffusion coefficient of the residual porous skeleton is \(0.013 \,\hbox {cm}^{2}/\hbox {h}\). (3) In the process of glauberite dissolution, three zones are formed from the interface to the outside: a crystallization completion zone, a crystalline transition zone, and a development zone of dissolution and crystallization. The crystallization completion zone is formed after 15 h dissolution. The thickness of the crystallization transition zone and development zone of dissolution and crystallization is approximately 0.5–1.0 mm.

Keywords

Evolving porous media Coupling Micro-structure  Glauberite Dissolved Micro-computed tomography 

Notes

Acknowledgments

This research was financially supported by the National Natural Science Foundation of China (Grant no. 51225404).

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Yangsheng Zhao
    • 1
  • Dong Yang
    • 1
  • Zhonghua Liu
    • 1
  • Zengchao Feng
    • 1
  • Weiguo Liang
    • 1
  1. 1.College of Mining TechnologyTaiyuan University of TechnologyTaiyuanChina

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