Three-Dimensional Reconstruction of the Porosity of Pellets of Iron Oxide and Coal Powders by Serial Sectioning

E.P. Rocha; José Adilson de Castro; Gláucio Soares da Fonseca

doi:10.4028/www.scientific.net/MSF.727-728.26

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HomeMaterials Science ForumMaterials Science Forum Vols. 727-728Three-Dimensional Reconstruction of the Porosity...

Three-Dimensional Reconstruction of the Porosity of Pellets of Iron Oxide and Coal Powders by Serial Sectioning

Abstract:

The self-reducing agglomerates produced from powders generated within the electric arc furnace and LD converters is of special interest in process of recycling due to the amount of iron and other metals of high economical value. However, the reducibility and inner pore structures play important role on the processing technology of these materials. Aiming at investigating the influence of the agglomerate structure, some two-dimensional metallographic techniques have been used to evaluate the porosity in clusters with inaccurate results, essentially due its three-dimensional features. From the processing technological point of view, the shape and distribution of inner porosity of the powders agglomerates are of fundamental importance due to their effects on the reaction rates involving the present phases taking place into the reduction stage. In this study a 3D serial sectioning imaging reconstruction is proposed to determine local inner porosities and detailed measurements of parameters of pores connections and tortuosities. The averaged porosities results are discussed and compared with traditional measurements based on pycnometry method.

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Materials Science Forum (Volumes 727-728)

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26-31

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https://doi.org/10.4028/www.scientific.net/MSF.727-728.26

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August 2012

Authors:

E.P. Rocha, José Adilson de Castro, Gláucio Soares da Fonseca

Keywords:

Characterization, Porosity, Tortuosity, Ultrafine Powder

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