Mineral processing by the abrasive–reactive wear

Уракаев, Ф. Х.

doi:10.1016/j.minpro.2009.02.010

Cited by 23 publications

(4 citation statements)

References 36 publications

(28 reference statements)

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“…6 Mostly the wear is seen as a contamination of the final product and could be a serious problem, for instance 1-5% Fe is normally present in most powders (e.g. B5% Fe in quartz powder and B2% Fe in silicon powder) 41,42 milled with steel balls. 3 With harder balls the abrasive wear is less, but harder balls tend to spall.…”

Section: Wear In Planetary Ball Millsmentioning

confidence: 99%

“…44 Iron silicates, for instance, can be synthesized from milling quartz powder with steel balls in the presence of oxygen because nanoscale iron and iron oxide particles are formed as a result of wear and react with the silica. 41 The wear is highly affected by the adhesion of the powder material to the ball, whether the material is able to form a layer around the ball respectively. 20,43 If the ball surface is insufficiently coated due to low adhesion of a free flowing powder the energy is wasted in wearing the balls.…”

Section: Wear In Planetary Ball Millsmentioning

confidence: 99%

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Process engineering with planetary ball mills

2013

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Planetary ball mills are well known and used for particle size reduction on laboratory and pilot scales for decades while during the last few years the application of planetary ball mills has extended to mechanochemical approaches. Processes inside planetary ball mills are complex and strongly depend on the processed material and synthesis and, thus, the optimum milling conditions have to be assessed for each individual system. The present review focuses on the insight into several parameters like properties of grinding balls, the filling ratio or revolution speed. It gives examples of the aspects of grinding and illustrates some general guidelines to follow for modelling processes in planetary ball mills in terms of refinement, synthesis' yield and contamination from wear. The amount of energy transferred from the milling tools to the powder is significant and hardly measurable for processes in planetary ball mills. Thus numerical simulations based on a discrete-element-method are used to describe the energy transfer to give an adequate description of the process by correlation with experiments. The simulations illustrate the effect of the geometry of planetary ball mills on the energy entry. In addition the imaging of motion patterns inside a planetary ball mill from simulations and video recordings is shown.

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Section: Wear In Planetary Ball Millsmentioning

confidence: 99%

Section: Wear In Planetary Ball Millsmentioning

confidence: 99%

Process engineering with planetary ball mills

2013

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“…This phenomenon should be carefully considered since, during the grinding process, wear of the milling media and/or the jar is inevitably engendered by mutual friction and collisions. Debris are mixed with the charge, leading to the contamination of the final product [1,22,46]. While in a few cases wear has been demonstrated to play a positive role by introducing reagents or catalysts [47,46], in general deteriorates the quality of the end-product, to the point that sometimes it must be removed in a post-process step [48,49].…”

Section: E↵ect Of Jar Shape On the Milling Timementioning

confidence: 99%

“…Debris are mixed with the charge, leading to the contamination of the final product [1,22,46]. While in a few cases wear has been demonstrated to play a positive role by introducing reagents or catalysts [47,46], in general deteriorates the quality of the end-product, to the point that sometimes it must be removed in a post-process step [48,49]. Several strategies have been proposed in literature aimed at limiting or even avoiding this side e↵ect, the most immediate being the careful selection of jar and balls materials [1,50] (e.g.…”

Section: E↵ect Of Jar Shape On the Milling Timementioning

confidence: 99%