Breakage process of mineral processing comminution machines – An approach to liberation

Parapari, Parisa Semsari; Parian, Mehdi; Rosenkranz, Jan

doi:10.1016/j.apt.2020.08.005

Cited by 29 publications

(11 citation statements)

References 134 publications

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“…SEM analysis of ground samples showed more agglomerates in the blank compared to particles with grinding aids [41]. Grinding mechanisms, such as abrasion and impact, have been reported to influence particle shape and roughness [14,47]. The observed roughening for AAG is consistent with the calculated roughness and the measured SSA, which is superior to the reference.…”

Section: Surface Morphology Of Ground Productssupporting

confidence: 70%

Exploring the effect of a polyacrylic acid-based grinding aid on magnetite-quartz flotation separation

Chipakwe

Karlkvist

Rosenkranz

et al. 2023

Separation and Purification Technology

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Section: Surface Morphology Of Ground Productssupporting

confidence: 70%

Exploring the effect of a polyacrylic acid-based grinding aid on magnetite-quartz flotation separation

Chipakwe

Karlkvist

Rosenkranz

et al. 2023

Separation and Purification Technology

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“…In term BC (Agitation time and Poloxamer) identified with antagonstic effects on PS under constrained conditions of increasing agitation time with higher level of poloxamer. Decrease in particle size from 277 to 257.5 nm was evident from the impressed negative effect in coded factor as well as in graphical representations (3D surface).The above illustrated effect was caused by gradual increasing in agitation time and that causes detructive breakage and abrasion, [ 17 ] that may diminish the powder particle size with increasing effective surface area, Besides that, higher levels of poloxamer act as polymer surfactants and help the powder to suspend. Both of these mechanisms made sure that the drug particle will crumble and communicate longer with agitation, which was directly related to size reduction.…”

Section: Resultsmentioning

confidence: 99%

Chemometrics Assisted Formulation of Glimepiride Nanosuspension for Solubility Enhancement in Diabetic Therapy—A Systematic Approach

Surendran,

Madheswaraguptha,

Ravula

et al. 2024

Macromolecular Symposia

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Glimepiride (GLM), a third‐generation sulfonylurea oral hypoglycemic medication, is used to treat type II diabetes. Admittedly, it has a low bioavailability, a relatively short half‐life (t1/2), and high toxicity. To address the issue, a nanosuspension of poorly soluble GLM is designed using a Quality‐by‐Design (QbD) method, to enhance its solubility. Prospective risk factors are identified and assessed using Critical Material Attribute (CMAs) and Critical Processing Parameter (CPPs) to evaluate the targets by Taguchi orthogonal array (OA) design and to study the effects of formulation and process variables on dependent variables. The amount of Polyvinylpyrrolidone (PVP) (X2), agitation time (X5), and concentration of Poloxamer (X7) are found as significant parameters (p < 0.05), and are further optimized using the Box Behnken Design as response surface methodology model. The optimized GLM nanosuspension 1) has mean particle size (PS), zeta potential, viscosity (VS), and percentage cumulative drug release (CDR%) of 258.17 nm, −25.2 mV, 1.087cPs, and 98.52%, respectively. The pattern of drug release is fitted to Non‐Fickian kinetics. The study results in an economic and efficient nano formulation with enhanced solubility.

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“…One of the main load mechanisms during grinding in tumbling mills, in addition to impact and compression, is shear [4]. This load causes tangential stresses and surface friction between grinding bodies and particles of the crushed material [5].…”

Section: Introductionmentioning

confidence: 99%

“…This load causes tangential stresses and surface friction between grinding bodies and particles of the crushed material [5]. Shear loading enables the implementation of an abrasion destruction mechanism [4,6,7] mainly in the surface layer of the material particle during fine grinding [8]. The implementation of the specified mechanisms is carried out in the zone of shear movement of granular intra-chamber loading (Fig.…”

Section: Introductionmentioning

confidence: 99%

Building a model of the abrasion grinding mechanism in a tumbling mill based on data visualization

Naumenko,

Deineka,

Zabchyk

2024

EEJET

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The object of this study is the grinding process in a tumbling mill when the mechanism of destruction by abrasion is implemented, which is caused by the mechanism of shear loading. The abrasive effect due to the impulse interaction during the mutual chaotic movement of granular particles in the shear layer of loading, characterized by the granular temperature, is taken into account. The task solved was determining the parameters of the shear interaction, which is caused by the difficulties of modeling and complexity of the hardware analysis of behavior of the internal loading in the mill. A mathematical model was built based on data visualization for the abrasion grinding mechanism. The power of the shear interaction forces was taken as an analog of the grinding performance. The initial shear characteristic was considered to be the average value of the shear velocity gradient in the central averaged normal section of the shear layer. The impact on productivity of the granular temperature and mass fraction of the shear layer and loading turnover was taken into account. The effect of rotation speed on performance was evaluated by experimental modeling at a chamber filling degree of 0.45 and a relative particle size of 0.0104. The maximum value of the energy and productivity of grinding by abrasion was established at the relative speed of rotation ψω=0.55–0.6. The results have made it possible to establish a rational speed when grinding by abrasion, ψω=0.5–0.6. This value is smaller in comparison with grinding by crushing ψω=0.55–0.65 and breaking ψω=0.75–0.9. The established effect is explained by the detected activation of the chaotic quasi-thermodynamic movement of particles of the shear layer at slow rotation. The model built makes it possible to predict rational technological parameters of the energy-saving process of fine grinding in a tumbling mill by abrasion

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Breakage process of mineral processing comminution machines – An approach to liberation

Cited by 29 publications

References 134 publications

Exploring the effect of a polyacrylic acid-based grinding aid on magnetite-quartz flotation separation

Exploring the effect of a polyacrylic acid-based grinding aid on magnetite-quartz flotation separation

Chemometrics Assisted Formulation of Glimepiride Nanosuspension for Solubility Enhancement in Diabetic Therapy—A Systematic Approach

Building a model of the abrasion grinding mechanism in a tumbling mill based on data visualization

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