A DEM based scale-up model for tumbling ball mills

Li, Yaoyu; You, Yong‐Ouk; Gou, Dazhao; Yu, Aibing; Yang, Runyu

doi:10.1016/j.powtec.2022.117854

Cited by 12 publications

(6 citation statements)

References 22 publications

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“…Figure 2 illustrates the charge material displacement from resting position to the ultimate height position labeled at point P, such that both the kinetic energy and gravitational energy exerted onto the charge material are at equilibrium and further linear energy increments will cause the charge or feed material to spin into complete mill circle without cascading or cataracting and failing the tumbling effect that cause particle fragmentation. The critical speed equation development can thus be traced mathematically through this model adaptation in accordance to the (Equations 1) through to (Equation 5), in chronological steps [1], [9], [12], [19], [20], [21], [22]. Where; (m) is the mass in (kg) of the grinding medium, (V) is the linear velocity (m/s) while (ℊ) is the acceleration due to gravity (m/s 2 ).…”

Section: Mechanical Grinding Modelmentioning

confidence: 99%

Coal Sampe Preparation Strategy using the TENCAN GQM series Ball Milling device.

Gaesenngwe,

RAGHUPATRUNI,

MAMVURA

et al. 2024

Preprint

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The application of Semi Autogenous Grinding strategy in mineral beneficiation engineering is well defined and established unit operation that is qualified for liberation of valuable final products from various rock ores of various kinds. The TENCAN GQM series Ball Mill equipment was deployed throughout our investigation to learn on optimum setting factors that are crucial in achieving effective product quality outcome during coal beneficiation. Therefore, a Semi-autogenous grinding methodology was deployed for grinding five (5) different coal samples into a product stream ranging in particle size from below [−600μm, +38μm] through an optimized procedure that syndicate three(3) control parameters being the {A − powder filling (fc), B − ball loading (JB) and C − residence time or grinding duration (t)}. Moreover, to analyse the grinding kinetics during interaction to produce coal mass recovery at desirable particle size specification relevant for specific manufacturing industry. However, initially the coal sample material was acquired and characterized via three spectroscopy techniques {x – ray diffraction (XRD), x – ray fluorescence (XRF), scanning electron microscopy (SEM)}, to establish contrast of each sample material in composition, morphology, hardness, and the relative abundance of occurring species entrenched within the coal structure (inorganic matter). Hence using the Proximate testing, Ultimate testing, and petrography analysis the examination was possible for each sample type collected. The coal samples that were initially collected were assorted in particle sizes classification and were grouped as run-of-mine coals (−200mm), Cobbles (−75mm, +40mm), Nuts (−40mm, +25mm), Peas (−32mm, +14mm) and fines (−14mm) according to our laboratory sieve specifications. However, the acquired coal species were initially subjugated to a hardness testing using the Hardgrove grindability Index device that reported a variable coal grindability index value with material hardness increased from Nuts (60.37), Cobbles (64.58), ROM (66.84), Fines (66.99) to Peas (67.37) which are relatively soft compared to other coal samples. Process engineers, researchers and students in different organizations studying metallurgy and coal beneficiation etc., must be informed about factors affecting coal material preparation innovations and the health-safety risk encounter by the mineral engineer personal during handling and processing. Moreover, production efficacy is significantly improved through adopting optimized model functions that accurately increase the product recovery at lower power rating for the cumulative production path hence relevantly reducing the cost(s) of exacerbated by tedious and unnecessary methods.

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Section: Mechanical Grinding Modelmentioning

confidence: 99%

Coal Sampe Preparation Strategy using the TENCAN GQM series Ball Milling device.

Gaesenngwe,

RAGHUPATRUNI,

MAMVURA

et al. 2024

Preprint

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“…The vessel is agitated in a rapid periodic motion, which causes impact of the loose grinding balls on the powders . Common mill types are the attritor, the planetary mill, and the vibratory or shaker mill, and mills have been the subject of extensive scalability research for industrial applications. − Recently, the polyester poly(ethylene terephthalate) (PET) was demonstrated to undergo complete depolymerization when processed in a vibratory mill with sodium hydroxide. , By contrast, the lack of labile functional groups on the backbone makes the conversion of polyolefins more challenging. Nevertheless, the breakage of the carbon–carbon bonds of polyolefins through ball milling has been the subject of study since the 1950–60s .…”

Section: Introductionmentioning

confidence: 99%

“… 29 Common mill types are the attritor, the planetary mill, and the vibratory or shaker mill, 30 and mills have been the subject of extensive scalability research for industrial applications. 31 − 33 Recently, the polyester poly(ethylene terephthalate) (PET) was demonstrated to undergo complete depolymerization when processed in a vibratory mill with sodium hydroxide. 34 , 35 By contrast, the lack of labile functional groups on the backbone makes the conversion of polyolefins more challenging.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Phenomena in Mechanochemical Depolymerization of Poly(styrene)

Chang,

Blanton,

Andraos

et al. 2023

ACS Sustainable Chem. Eng.

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Synthetic polyolefinic plastics comprise one of the largest shares of global plastic waste, which is being targeted for chemical recycling by depolymerization to monomers and small molecules. One promising method of chemical recycling is solidstate depolymerization under ambient conditions in a ball-mill reactor. In this paper, we elucidate kinetic phenomena in the mechanochemical depolymerization of poly(styrene). Styrene is produced in this process at a constant rate and selectivity alongside minor products, including oxygenates like benzaldehyde, via mechanisms analogous to those involved in thermal and oxidative pyrolysis. Continuous monomer removal during reactor operation is critical for avoiding repolymerization, and promoting effects are exhibited by iron surfaces and molecular oxygen. Kinetic independence between depolymerization and molecular weight reduction was observed, despite both processes originating from the same driving force of mechanochemical collisions. Phenomena across multiple length scales are shown to be responsible for differences in reactivity due to differences in grinding parameters and reactant composition.

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“…However, a number of research have been developed to investigate the balls motion inside ball mill based on the DEM simulations [5] [6] [7] [8]. For example, Li et al [9] developed a scale-up model based on DEM modeling to study the performance of tumbling ball mills. They showed that the particle-ball contacts were the principal breakage mechanism of particles during milling.…”

Section: Introductionmentioning

confidence: 99%

Effect of Milling Parameters on DEM Modeling of a Planetary Ball Mill

Mhadhbi¹

2023

AMPC

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The effects of the milling parameters involving shape of powder particles, rotation speed, and ball-to-powder diameter (BPDR) on DEM modeling in the planetary ball mill were investigated. BPDR was varied from 1 to 10. The results revealed that the size and shape of the powder particles do not give a significant change in simulation results when BPDR attains maximum value of 10. The increasing of BPDR leads to the increase of simulation time and size. Hence, the effect of change of the powder particle shape on the calculated data size is not significant. The results also revealed that the increasing rotation speed increases impact energy between powder particles.

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A DEM based scale-up model for tumbling ball mills

Cited by 12 publications

References 22 publications

Coal Sampe Preparation Strategy using the TENCAN GQM series Ball Milling device.

Coal Sampe Preparation Strategy using the TENCAN GQM series Ball Milling device.

Kinetic Phenomena in Mechanochemical Depolymerization of Poly(styrene)

Effect of Milling Parameters on DEM Modeling of a Planetary Ball Mill

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