Iron ore sinter porosity characterisation with application of 3D X-ray tomography

Shatokha, Volodymyr; Korobeynikov, I; Maire, Éric; Grémillard, Laurent; Adrien, Jérôme

doi:10.1179/030192310x12683045805865

Cited by 27 publications

(6 citation statements)

References 12 publications

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“…Thus, the separated pores were shown in Figure 4d while the pore structure was gained. In regard to the volume reconstruction, we accumulated 2D CT images along the load direction, 45,46 and the reconstructing volumes of the sample and pores at specific sintering time were shown in Figures 5–7. Meanwhile, the pore numbers, frequencies of the pore diameters, and porosities were obtained.…”

Section: Experiments and Methodsmentioning

confidence: 99%

Experimental investigation of pore structure during high sodium coal ash sintering with and without calcium oxide additive through XCT technology

Fang

Wang

Luo

et al. 2022

Asia-Pacific J Chem Eng

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This article investigates the evolution of morphology and pore structure during sintering at 1200 C for a high sodium coal ash, with and without using a calcium oxide additive. The effect of different proportions of calcium oxide additive was studied. The ratios of height and area of samples were calculated, and representative sintering time points of morphological changes were captured. Meanwhile, frequencies of diameter, pore numbers, and porosities were obtained by processing images. The maximum ratio of height and area reached at 15 min, 4 min, and 10 min for the sintering process of coal ash sample without additive, with 5% and 10% CaO, proving that CaO accelerates the sintering process. In comparison, the maximum porosities were 52.4%, 39.5%, and 47.0% for sintering samples after 10 min, 6 min, and 40 min.Besides, X-ray diffraction analysis of the minerals of the condensed white matter was conducted.

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Section: Experiments and Methodsmentioning

confidence: 99%

Experimental investigation of pore structure during high sodium coal ash sintering with and without calcium oxide additive through XCT technology

Fang

Wang

Luo

et al. 2022

Asia-Pacific J Chem Eng

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“…Recently, several scholars have researched porous materials on the basis of the XCT noninvasive three-dimensional rendering technology. , X-rays are reflected on samples in different directions while two-dimensional slices are stacked along the orthogonal direction to reconstruct the three-dimensional volume of the samples. , Afterward, several properties, such as the pore distribution and parameters, can be determined. , Zhou et al reconstructed a porous structure and simulated the pore parameters for accumulated ceramsite samples based on 3D X-ray tomography at a high resolution. Shatokha et al applied XCT for the estimation of the pore parameters of iron ore sinter and compared the results with those from mercury intrusion porosimetry.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Pore Structure during Coal and Biomass Ash Sintering Based on X-ray CT Technology

Wang

Zhou

et al. 2021

Energy Fuels

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This paper explores the evolution of pore structure parameters during Zhundong coal and biomass ash sintering at 1473 K. Additionally, the influences of blending biomass ash with different proportions are determined. The pore parameters, including the porosity, diameter, number, and frequency of the equivalent diameter, were processed by reconstructing and processing three-dimensional (3D) data on the basis of X-ray computed microtomography (XCT). The maximum porosities for the cases of pure coal and mixture of 10% biomass and 50% biomass during sintering are determined to be 46.6, 42.6, and 24.0%, respectively, while the frequencies of small pores (<0.2 mm) in the coal ash samples are lower than those in the other cases. In addition, the mineralogical phase transformation during sintering is identified by X-ray diffraction analysis. The condensate in the pores mainly comprises NaCl, CaSO 4 , and KCl, which indicates that the volatilization of alkali metals and the formation and gasification of anhydrite occur throughout the sintering process.

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“…This approach has been applied to investigate the deformation mechanisms for a variety of porous material such as cellular aluminum, 19 anodes in solid oxide fuel cell, 20 and the 316L steel etc 21,22 . However, to the author's knowledge, no work has been reported so far on the strength properties of iron ore sinter using this approach 23,24 . A systematic study of sinter strength in both the macro scale and micro scale would be helpful to further optimize the sintering process.…”

Section: Introductionmentioning

confidence: 99%

Flame front propagation and sinter strength properties of permeable sintering bed prepared via enhanced granulation with hydrated lime

Zhou

2020

Asia-Pacific J Chem Eng

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This paper is focused on investigating the influences of enhanced granulation with hydrated lime on the propagation of flame front and strength properties of the produced sinter in iron ore sintering. Pilot‐scale sinter pot experiments were performed at three hydrated lime levels, and the porous structures of sinter were reconstructed by high resolution X‐ray tomography. When hydrated lime increased from 0% to 2%, more permeable green bed with enlarged granule mean size and narrowed granule size distribution could be obtained, and sinter productivity increased from 37.3 to 40.7 t/m2/d while tumbler index of sinter decreased from 62.7% to 55.0%. Both the bed temperature and pressure profiles verified that hydrated lime addition fasten sintering by reduction of heat accumulation and acceleration of flame front speed in sintering bed. The three‐dimensional stress analysis based on the actual microstructures showed that more irregular sinter particles with higher porosity are obtained with higher hydrated lime due to the insufficient melt formation and coalescence during sintering. Sinter with 2% hydrated lime was much more compliant under the fixed compression, exhibiting larger potential to be deformed in locations including bridges with the small cross sections and notches with the small fillet radius.

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Iron ore sinter porosity characterisation with application of 3D X-ray tomography

Cited by 27 publications

References 12 publications

Experimental investigation of pore structure during high sodium coal ash sintering with and without calcium oxide additive through XCT technology

Experimental investigation of pore structure during high sodium coal ash sintering with and without calcium oxide additive through XCT technology

Experimental Study of the Pore Structure during Coal and Biomass Ash Sintering Based on X-ray CT Technology

Flame front propagation and sinter strength properties of permeable sintering bed prepared via enhanced granulation with hydrated lime

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