# calculate media charge in a ball mill xls

The Media Charge_Trajectories spreadsheet was designed to simulate the outermost trajectory of a given ball inside a tumbling grinding mill, in order to study the potential effects of various changes in liner design, ball size and other relevant operating conditions.

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CALCULATION OF THE REQUIRED SEMIAUTOGENOUS MILL POWER BASED ON THE BOND WORK INDEXES O. I. SKARIN, Senior Researcher, ... gy of the ball charge during its motion inside the rotating mill. The concluding section of the article offers empirical formulas to calculate idling and aggregate capacity of the mill main drive. Key word: semiautogenous ...

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Type of Mill Media Size, in. Tip Speed, ft./sec. Ball mill ½ and larger — ... charge screen. 2. Don''t choke the mill by starting with solids content that''s higher than the mill can process. A rule of thumb is to start with 50% solids and adjust as needed. Remember that as particle size is

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derive expression for critical speed of ball mill. derive an expression for the critical speed of a ball mill. Calculations for mill motor power, mill speed and media charge. To calculate media charge for cylindrical mill power required for a cylindrical type ball mill. Get Price

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PROCESS DIAGNOSTIC STUDIES FOR CEMENT MILL OPTIMISATION - CASE STUDY V.K. Batra*, D. Bhaskara Rao** and Raju Goyal*** ... • Empty heights of both the chambers measured to calculate the ball charge, % filling and estimate the power ... mill liner conditions, grinding media charge and product size requirements.

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Mar 20, 2018· Ball mills are usually operated at 75% of the critical speed. The critical speed is the speed where, mathematically calculated, the grinding media would centrifuge out.

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The Bond equation is used to calculate ball mill specific energy from T 80 to the final product P 80 size. The total circuit specific energy is the sum of the SAG mill and ball mill specific energies. W ... Ms = SAGDesign test mill charge mass (g) K a = Correction factor for feed size K b = Correction factor for pebble crushing T

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Jar, Ball and Pebble Milling . Theory and Practice. ... speed is such that the media charge breaks away from the mill wall at an angle of 45 to 60 degrees above the horizontal. Cascading is the case where grinding media from the outer edge falls and rolls in a ... Theory and Practice for ...

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Mar 31, 2008· The power (in kW) required to turn a ball mill is approximated by: P = 0.285 d (1.073-j) m n where d is the internal diameter in metres, j is the fraction of the mill volume occupied by media, m is the total mass of media in the mill, in tonnes, and n is the mill speed, rpm.

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The pilot mill is also equipped with a sensor measuring the ''ball and pulp toe and shoulder angles'' (see Figure 3). These data are then used to calculate the total pulp and ball charge angle (see Graph 5). Graph 5 clearly illustrates how the ball charge stays quite compact till about 73% solids as the total media angle does not change.

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