Fractographic approach to metallurgical coke failure analysis. Part 2: Cokes from binary coal blends

Roest, Richard; Lomas, Hannah; Mahoney, Merrick R.

doi:10.1016/j.fuel.2016.04.022

Cited by 13 publications

(15 citation statements)

References 25 publications

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“…Shohei MATSUO, 1) * Yasuhiro SAITO, 2) Yohsuke MATSUSHITA, 3) Hideyuki AOKI 3) and Hideyuki HAYASHIZAKI 3,4) distribution and thermal stress caused by the temperature gradient in the coke oven is necessary for the prediction of the formation of fissures during the carbonization of coke. Numerical analysis through models such as the finite element method (FEM) have been widely used to simulate the mechanical response of the coke, 6,[11][12][13] and for thermal stress analyses.…”

Section: Development Of Analytical Methods Of Predicting Fissures Formation For Carbonization Process Of Cokementioning

confidence: 99%

“…1) Cracks are one of the factors that affects the size of coke as they cause failure of the coke cake. [2][3][4][5][6][7] Major fissures and secondary fissures are of concern as they manifest large cracks in the coke cake. The fissures are formed during the carbonization process, and their number and spacing determines the size of the coke.…”

Section: Introductionmentioning

confidence: 99%

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Development of Analytical Method of Predicting Fissures Formation for Carbonization Process of Coke

et al. 2020

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The development of a numerical method for fissure formation during the carbonization of coke is needed because the formed fissures determine the coke's particle size. In this study, we proposed and developed a novel numerical method that can represent initiation, extension, and branching of multiple cracks. Fundamental tests (i.e., bending of a beam, stress analysis of a center crack plate, and crack propagation in a plate under tensile loading) were performed using the proposed method. The test results showed that the numerical accuracy of stress analysis and the fracture analysis using the proposed method were high and were comparable to other standard numerical methods. Furthermore, we applied the proposed method for the coupled analysis of heat conduction and thermal stress and performed numerical simulations for the formation of fissures in coke during carbonization. The numerical simulation results showed that major fissures extended in a linear direction, perpendicular to the direction of an oven wall. And the numerical results reflected qualitative features of an actual coke-making process using a chamber oven. Therefore, the proposed method could be used to reproduce the formation of fissures in coke during the carbonization process.

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Section: Development Of Analytical Methods Of Predicting Fissures Formation For Carbonization Process Of Cokementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of Analytical Method of Predicting Fissures Formation for Carbonization Process of Coke

et al. 2020

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“…Moreover, it is not possible from micro-CT analysis alone to locate the origin of fracture and direction of fracture propagation through the coke. A detailed study demonstrating the use of fractography to coke is given in our previous publications [12][13][14][15]. For the coke samples available for testing in this project, we attempted to identify the dominant breakage mechanisms.…”

Section: Fractographic Analysismentioning

confidence: 99%

“…Fractography is a technique used to investigate the breakage behaviour of a material by decoding the fracture surface topography and patterns of crack propagation, in order to locate the origin of failure as well as the regions of the microstructure at which stress is concentrated. It is a common method of identifying the modes of failure in metals and ceramics, and we have successfully applied the technique to identify and quantify the fracture mechanisms and microstructural features of high stress concentration in metallurgical cokes of varying properties [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Examining mechanisms of metallurgical coke fracture using micro-CT imaging and analysis

Lomas

Jenkins

Mahoney

et al. 2017

Fuel Processing Technology

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“…Thus, it is important to clarify the role of inert components in the shrinkage behavior of coke during carbonization. Although the effect of inert materials on the stress of the coke matrix and the strength of coke were examined in previous studies, [13][14][15][16][17] little is known about the effect on the contraction behavior.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Effect of Inert Components on the Shrinkage Phenomenon of Coke

et al. 2019

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The effect of inert components in coke on the shrinkage ratio of coke was numerically investigated. The carbonization process of semi-coke was simulated by using the finite element method. Coke models with a coke matrix, pores, cracks, and/or inert components were used. The numerical results using a coke model composed of a coke matrix and pores indicated that pores did not affect the shrinkage behavior of semi-coke. In addition, cracks did not affect the shrinkage behavior. On the other hand, from a numerical simulation using a coke model with inert components, the addition of inert components decreased the shrinkage ratio of coke. When the inert components were added, the elastic modulus of the inert components, viscosity of the matrix of semi-coke, and size of the inert components affected the shrinkage ratio. Furthermore, cracks extending from the inert component drastically decreased the shrinkage ratio of coke because the thermal stress around the interface between the matrix and inert components opened the crack.

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Fractographic approach to metallurgical coke failure analysis. Part 2: Cokes from binary coal blends

Cited by 13 publications

References 25 publications

Development of Analytical Method of Predicting Fissures Formation for Carbonization Process of Coke

Development of Analytical Method of Predicting Fissures Formation for Carbonization Process of Coke

Examining mechanisms of metallurgical coke fracture using micro-CT imaging and analysis

Numerical Investigation of the Effect of Inert Components on the Shrinkage Phenomenon of Coke

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