Experimental observations of mill operation parameters on kinematic of the tumbling mill contents

Soleymani, Moslem Mohammadi; Mahani, M. Fooladi; Rezaeizadeh, Masoud

doi:10.1051/meca/2015077

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…A growth of relative productivity of grinding with a decrease in this concentration was established. The influence of material content on the behavior of the intra-mill fill motion was studied in [22] by visualization method. The ratio of slurry volume to the volume of cavities between grinding bodies was 0, 41, 84, 125, 166, 208, 250, and 292 %.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Establishing the effect of decreased power intensity of self-oscillatory grinding in a tumbling mill when the crushed material content in the intra-chamber fill is reduced

Deineka

Naumenko

2020

EEJET

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The influence of the content of crushed material in the intra-chamber grinding fill on the efficiency of the self-oscillatory grinding process in the tumbling mill was assessed. A dynamic effect of a significant decrease in self-oscillatory action of the two-fraction fill of the rotary chamber with an increase in the content of fine fraction was revealed by the method of visual analysis of motion patterns. A decrease in values of the following inertial fill parameters was established: maximum dilatancy υ max , the relative amplitude of self-oscillations ψ Rυ and a maximum share of the active part κ fam max with an increase in the degree of filling the gaps between particles of the coarse fraction κ mbgr. A decrease in the generalized complex degree of dynamic activation K a was also established. The effect is due to the strengthening of the cohesive properties of the incoherent coarse fraction under the influence of the fine fraction. There was a decrease in by 29 % for υ max, by 7 % for ψ Rυ , 2.9 times for κ fam max and 4.2 times for K a with an increase in κ mbgr from 0 to 1 at the degree of filling the chamber with the fill κ br = 0.45. Technological effect of a significant decrease in specific energy intensity and an increase in productivity of the innovative self-oscillatory grinding process in comparison with characteristics of the conventional steady-state process at a decrease in the content of crushed material in the fill was established. A process of milling cement clinker with grinding bo dies at relative size of 0.026 and κ br = 0.45 was considered. A decrease in specific energy intensity by 27 % at κ mbgr = 1, by 38 % at κ mbgr = 0.5625 and by 44 % at κ mbgr = 0 was found. An increase in relative productivity by 7 % at κ mbgr = 1, by 26 % at κ mbgr = 0.5625 and by 39 % at κ mbgr = 0.125 was established. The established effects will make it possible to forecast rational parameters of the self-oscillatory grinding process in a tumbling mill at the variation of the content of the crushed material in the fill Keywords: tumbling mill, content of crushed material in intra-chamber fill, self-oscillations, energy intensity of grinding

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Establishing the effect of decreased power intensity of self-oscillatory grinding in a tumbling mill when the crushed material content in the intra-chamber fill is reduced

Deineka

Naumenko

2020

EEJET

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Performance Evaluation of Polygonal and Cylindrical Ball Mills Using Discrete Element Method

Kyalo,

Kimotho,

Ndiritu

2024

Engineering Reports

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Ball mills are frequently utilized in the chemical and mineral processing industries to reduce the size of particles. In mineral processing, cylindrical rotating mills with wear‐resistant materials are used at various operation scales. Polygon‐shaped rotating mills are used in artisanal and small‐scale mining due to technological and economic reasons. It is imperative to thoroughly evaluate polygon‐shaped mills to inform decisions regarding their improvement or replacement based on technological data. Even a minor enhancement in grinding efficiency and mill durability can yield substantial economic and environmental advantages. In this study, the performance of polygonal‐shaped mills was evaluated and compared with cylindrical profiles, taking into account power draw, collision energy dissipation, relative wear, and operational stability. The effect of installing lifters in the mills was also assessed. Simulations using the discrete element method (DEM) were carried out to describe the mechanical behavior of grinding media and its interaction with the mill walls. Notably, polygonal‐shaped mills without lifters facilitated interparticle interaction with limited centrifuging of particles compared to cylindrical mills without lifters. The installation of lifters in polygonal mills increased interparticle collisions and reduced power draw and wear rate. Cylindrical mills with lifters had high interparticle collisions similar to polygonal profiles but with much lower wear rate and high operational stability.

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Towards a Pool-based Model of Volumetric Slurry Hold-up for Cylindrical Ball Mills

Mulenga

2019

Mineral Processing and Extractive Metallurgy Review

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Experimental observations of mill operation parameters on kinematic of the tumbling mill contents

Cited by 3 publications

References 15 publications

Establishing the effect of decreased power intensity of self-oscillatory grinding in a tumbling mill when the crushed material content in the intra-chamber fill is reduced

Establishing the effect of decreased power intensity of self-oscillatory grinding in a tumbling mill when the crushed material content in the intra-chamber fill is reduced

Performance Evaluation of Polygonal and Cylindrical Ball Mills Using Discrete Element Method

Towards a Pool-based Model of Volumetric Slurry Hold-up for Cylindrical Ball Mills

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