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- W2083182429 abstract "In this paper, the study of particle breakage mode versus mill operating parameters is addressed. Stirred mills grinding modes are mainly attrition but could be manipulated to include breakage by compression or impact loading. Macro and micro analysis of particle breakage and grinding mechanisms are correlated. Macro analyses convey information that relates grinding mechanism to particle size and shape. Micro analysis on the other hand relates the particle breakage mode to the fracture type whether transgranular or intergranular. Intergranular particle breakage leads to higher mineral liberation compared to transgranular breakage. Similar minerals would have more homogeneous properties that convey a stronger bond compared to dissimilar, heterogeneous mineral bonds. This paper presents the results of an investigation that assesses how operating conditions can affect trans- versus inter-granular breakage. It is deduced that with the standard stirred mill operation, the breakage mode is primarily abrasion. Breakage mode is characterized using morphology analysis as a tool. Accordingly, if mill operation is controlled such that compression and impact breakage modes are imposed, then there will be a potential to impose inter-granular breakage rather than trans-granular. Résumé Dans cet article, on aborde l'étude du mode de fracture de particule en relation avec les paramètres d'opération du broyeur. L'attrition est le principal mode de broyage des broyeurs agités, mais on pourrait également inclure la fracture par compression ou par charge de chocs. L'analyse à l'échelle macro et micro de la fracture de particule est corrélée aux mécanismes de broyage. Les analyses à l'échelle macro donnent l'information qui relie le mécanisme de broyage à la taille et à la forme de la particule. D'un autre côté, l'analyse à l'échelle micro relie le mode de fracture de la particule au type de fracture, soit transgranulaire ou intergranulaire. La fracture intergranulaire de la particule mène à une libération plus élevée du minéral par rapport à la fracture transgranulaire. Des minéraux similaires auraient des propriétés plus homogènes donnant un lien plus fort par rapport aux liens de minéraux dissimilaires, hétérogènes. Cet article présente les résultats d'une investigation qui évalue comment les conditions d'opérations peuvent affecter la fracture trans- ou inter-granulaire. L'opération normale d'un broyeur agité donne un mode de fracture principalement par abrasion. Le mode de fracture est caractérisé par analyse de morphologie, comme outil. Donc, si l'opération du broyeur est contrôlée de telle manière que l'on impose un mode de fracture par compression ou par impact, il sera alors possible d'imposer la fracture inter-granulaire plutôt que trans-granulaire." @default.
- W2083182429 created "2016-06-24" @default.
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- W2083182429 date "2010-10-01" @default.
- W2083182429 modified "2023-09-26" @default.
- W2083182429 title "Mineral Liberation and Particle Breakage in Stirred Mills" @default.
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- W2083182429 doi "https://doi.org/10.1179/cmq.2010.49.4.419" @default.
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