Influence of grinding on the graduation graphitization and densification of coke powder

Ogawa, Ichitaro; Yoshida, Hisayoshi; Kobayashi, Kazuo

doi:10.1007/bf00542379

Cited by 15 publications

(6 citation statements)

References 3 publications

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“…Constant impacts make that, insofar as milling is developed, breakage planes are found in particles, which give rise to more angular particles. This fact has been previously studied 11 and fits with the results obtained in the present work, thus justifying that increasing milling time gradually modifies particle morphology, flattening it through milling. This analysis does not change when 600 rev min 21 rate is used; that is, the same effect is achieved at lower times when a higher rate is used.…”

Section: Discussionsupporting

confidence: 92%

“…According to literature, only the first three techniques have been applied to the study and characterisation of coke milling. [10][11][12] A natural graphite (EDM grade from ISMAF) typically used in PM applications was evaluated for comparison. Figure 1 summarises how the evolution of the coke morphology observed by SEM.…”

Section: Methodsmentioning

confidence: 99%

“…11 Regarding final coke morphology, it might be either spherical 10 or elongated. 11 On the other hand, increase in specific surface area also takes place through milling time. 10 It has also been observed that the milling process destroys laminar structure and microcrystal orientation, and increases net distortion, 11,12 all of which improves coke sinterability.…”

Section: Introductionmentioning

confidence: 99%

“…11 On the other hand, increase in specific surface area also takes place through milling time. 10 It has also been observed that the milling process destroys laminar structure and microcrystal orientation, and increases net distortion, 11,12 all of which improves coke sinterability. 12 In the case of natural crystalline graphite, milling processes imply an increase in the interlaminar space d002 through time, while the average size of the crystallyte domain decreases.…”

Section: Introductionmentioning

confidence: 99%

“…Some researchers suggest that particle size diminution takes place, above all, at low milling times, from which particle size remains practically stable; 10 other researchers propose that such size reduction persists at high times. 11 Regarding final coke morphology, it might be either spherical 10 or elongated. 11 On the other hand, increase in specific surface area also takes place through milling time.…”

Section: Introductionmentioning

confidence: 99%

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Milling process of petroleum coke for sintered steel applications

et al. 2011

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The effect of milling on different properties of a petroleum coke has been evaluated.The material was subjected to planetary milling at two different rates (400 and 600 rev min 21 )for different times up to 48 h. The milled material was characterised by scanning electron microscopy, X-ray diffraction, sieve analysis, thermal analysis, chemical analysis, specific surface area and compressibility has been undertaken. The results show that the milling produces a very quick loss of the crystal structure of the coke and a rapid comminution, which lead to large increases in specific surface area and compressibility losses. The coke has shown a high activity through the milling process, absorbing a great quantity of oxygen. The increase in milling time shifts its thermal decomposition to lower temperatures.

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Section: Discussionsupporting

confidence: 92%

Section: Methodsmentioning

confidence: 99%