Consideration of X-ray microtomography to quantitatively determine the size distribution of bubble cavities in iron ore pellets

Bhuiyan, Iftekhar Uddin; Mouzon, Johanne; Forsberg, Fredrik; Forsmo, S.P.E.; Sjödahl, Mikael; Hedlund, Jonas

doi:10.1016/j.powtec.2012.09.012

Cited by 26 publications

(5 citation statements)

References 26 publications

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“…Several X-ray application methods are used for agriculture [12]. One of them is the X-ray photography, which is widely used as a tool to determine the spatial distribution of different solid phases or structures, for deformations, fatigues and fractures that result from the processing, as well as corrosion and environmental interactions [13,14]. This technique has been implemented for many years in solid wood and composite materials [15].…”

Section: Introductionmentioning

confidence: 99%

Application of the X-ray densitometry in the evaluation of the quality and mechanical properties of biomass pellets

Moya

Filho

et al. 2015

Fuel Processing Technology

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a b s t r a c tThe use of the X-ray technique and the X-ray densitometry to determine pellet particle distribution and to understand the biomass compaction and its effects in pellet properties has been limited. The present work evaluates the quality of pellets manufactured with several lignocellulosic materials by using X-ray photography for studying surface cracks and irregularities, and by using X-ray densitometry to evaluate density and its variation in longitudinal and transversal directions. Density values and their variation were correlated to the pellets' mechanical properties (mechanical durability and compression resistance). It was found that X-ray photography may be applied to evaluate the presence of cracks and irregularities in the pellets' surface; however, these are not indicators of pellet durability or compression resistance. Moreover, density evaluation by the X-ray densitometry technique allowed the determination of the pellets' mechanical resistance and durability. A negative correlation was observed between the force at break and the coefficient of variation of density. No correlation was found between the mechanical durability and the average density or its variation. According to the above results, X-ray technique can be utilized to study the pellet quality.

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Section: Introductionmentioning

confidence: 99%

Application of the X-ray densitometry in the evaluation of the quality and mechanical properties of biomass pellets

Moya

Filho

et al. 2015

Fuel Processing Technology

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“…The experimental observations at different instants revealed that deformation was, as expected, almost confined to a small cap below the indenter, where cell collapse occurred endowed by buckling of cell walls in the vicinity of the densified region. In [8] the evolution of bubble cavities in iron pellets was investigated by microCT. Iron ore green pellets are prepared by a mixture of iron ore concentrate, water, additives and bentonite.…”

Section: Engineering Materialsmentioning

confidence: 99%

X-ray Microtomography under Loading and 3D-Volume Digital Image Correlation. A Review

Fedele

Ciani

Fiori

2014

Fundamenta Informaticae

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In this review paper the synergistic combination of X-ray microtomography, in situ mechanical tests on material samples and full-field kinematic measurements by 3D-Volume Digital Image Correlation is discussed. First, basic features are outlined, concerning X-ray microtomography by either laboratory sources or synchrotron radiation. The main equations for 3D-Volume Digital Image Correlation are then presented, and different provisions regularizing the ill-posed problem of motion estimation are outlined. Thereafter, a survey of the state of the art is provided, with reference to a variety of biological and engineering materials. Limitations and perspectives of the proposed methodology in diverse applications are highlighted. The rapid growth of this research topic is emphasized, due to the truly multi-disciplinary vocation, the synergy between algorithmic and technological solutions, a fusion of experiments and numerical methods.

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“…characterize and evaluate the deterioration of the eucalyptus wood due to white rot fungi, and to detect the limits of the heartwood-sapwood, the effect of forest management on the wood properties, the annual production of biomass and the relation with its anatomical structure [27][28][29] . However, this technique is under-used for evaluating the internal density of solid biofuels such as briquettes and pellets 25,30,31 .…”

mentioning

confidence: 99%

Quality of Pinus sp. pellets with kraft lignin and starch addition

Castro

Siqueira

Castro

et al. 2021

Sci Rep

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Pellets are widely used for power generation because they use renewable raw material with easy storage, transport and high energy density. However, the structural fragility, disintegrating during handling, transport and storage, is one of the main problems of pellets, but the addition of binders/additives can minimize this fragility. The objective of this study was to evaluate the properties of wood pellets with the addition of starch (corn and wheat) and kraft lignin in different proportions. Pellets were produced with the addition of starch (wheat and corn) and kraft lignin in the proportions of 1, 2, 3, 4 and 5% in relation to the mass of wood particles of Pinus sp., with 12% moisture (dry basis), classified in 3 and 1 mm sieves and compacted in a pelleting press in the laboratory, according to European standard EN 14961-2. Physical and mechanical properties of the pellets were evaluated and their densitometric profiles obtained from the Faxitron LX-60 X-ray equipment. Corn starch and kraft lignin additives at 4% improved pellet properties (density, fines and hardness), reducing their losses during handling, storage and transport.

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Consideration of X-ray microtomography to quantitatively determine the size distribution of bubble cavities in iron ore pellets

Cited by 26 publications

References 26 publications

Application of the X-ray densitometry in the evaluation of the quality and mechanical properties of biomass pellets

Application of the X-ray densitometry in the evaluation of the quality and mechanical properties of biomass pellets

X-ray Microtomography under Loading and 3D-Volume Digital Image Correlation. A Review

Quality of Pinus sp. pellets with kraft lignin and starch addition

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