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Discrete element method simulations of a 1 5 scale laboratory ball mill are presented in this paper to study the influence of the contact parameters on the charge motion and the power draw The position density limit is introduced as an efficient mathematical tool to describe and to compare the macroscopic charge motion in different scenarios i.a with different values of the contact

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Discrete element method simulations of a 1 5 scale laboratory ball mill are presented in this paper to study the influence of the contact parameters on the charge motion and the power draw The position density limit is introduced as an efficient mathematical tool to describe and to compare the macroscopic charge motion in different scenarios i.a with different values of the contact parameters.

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Ball mills like other comminution devices consume large amounts of energy Mill operators often have to assess the power draft of mills for an entirely different set of operating conditions or for a reconfigured circuit It is shown that the power draft can be accurately predicted from analysis of the motion of the charge.

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In this research the effect of ball size distribution on the mill power draw charge motion regime and breakage mechanism in a laboratory ball mill was studied using the discrete element method DEM simulation The mill shell and crushing balls were made of Plexiglas and compressed glass respectively Modeling was performed using Particle Flow Code 3D PFC3D .

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Effective mill power draw Ball mill specific grinding rate Ball mill grinding efficiency The circuit output is defined as the production rate of fines by the circuit It is calculated from three values 1 The dry ore feed rate to the circuit t/h 2 The fines in

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The vibratory ball mill VBM Sweco Belgium consists of a 36 L capacity grinding chamber made of an abrasion resistant elastomer put in vibrating motion by high tensile steel springs 28

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This paper is the second installment of an ongoing numerical study of ball mills The first installment Cleary 1998a described the basic modelling of a 5 m ball mill Predictions of charge profile charge segregation power draw torque liner wear and collisional force distributions were made for a range of mill conditions.

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