### Calculate and Select Ball Mill Ball Size for Optimum Grinding

Based on his work, this formula can be derived for ball diameter sizing and selection: Dm <= 6 (log dk) * d^0.5 where Dm = the diameter of the single-sized balls in mm.d = the diameter of the largest chunks of ore in the mill feed in mm.

### The operating principle of the ball mill

Energy consumption for ball mills is a function of many factors: the physical properties of the ground material – its specific gravity and hardness; the degree of drum filling by grinding balls; the number of drum rotations, etc. Ball mills have low efficiency – no more than 15%.

### Ball mill - Wikipedia

A ball mill is a type of grinder used to grind, blend and sometimes for mixing of materials for use in mineral dressing processes, paints, pyrotechnics, ceramics and selective laser sintering. It works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell.

### Ball mill parameters selection - Henan Mining Machinery Co ...

Ball mill motor selection Henan Mining Machinery C. drive selection for ball mill fablabni BALL MILL DRIVE MOTOR CHOICES artecmachine The mill used for this parison is a 44meter diameter by 136 meter long ball mill with a 5000 HP drive motor It is designed for approximately 90 ston per hour This type twopartment mill is a state oftheart shell supported cement finish mill

### Assessing the dependency of selection function parameters ...

And as summarised in Table 5, the selection function parameters a k and μ k are strongly dependent on ball size and mill diameter while parameters α and Λ are constant throughout. The breakage function parameters ( β , γ , and Φ), in contrast, are all notably unaffected by the experimental conditions and the design of the ball mill.

### (PDF) On the Selection Function and the Breakage Function ...

The mass balance equation which simulates the comminution process is composed of the selection function and the breakage function. Usually it is assumed that these two functions a

### Grinding in Ball Mills: Modeling and Process Control

The design of a ball mill can vary significantly depending on the size, the equipment used to load the starting material (feeders), and the system for discharging the output product. The size of a mill is usually characterized by the ratio “length to diameter” and this ratio most frequently varies from 0.5 to 3.5.

### The Selection and Design of Mill Liners - MillTraj

function of mill liners. The second primary function of a liner is to transfer rotary motion of the mill to the grinding media and charge. After all, it is the interface between the mill and the grinding charge. Although work on the grinding action in mills was published 100 years ago …

### EFFECT OF BALL SIZE DISTRIBUTION ON MILLING PARAMETERS

3.1 Snapshot of the laboratory mill 44 4.1 Selection functions as obtained for three media diameters grinding mono-sized coal materials. In this case (-2360 +1700 microns) 54 4.2 Effect of ball diameter on the selection function 55 4.3 Reduced selection function graph 56 4.4 Reduced cumulative breakage function …

### The specific selection function effect on clinker grinding ...

The specific selection function effect on clinker grinding . efficiency in a dry batch ball mill . D. Touil a, S. Belaadi a, C. Frances b, 1 (a) Laboratoire de Génie de la Réaction, FGMGP, USTHB, BP 32 El-Alia, 16000 . Alger, Algérie (b) Laboratoire de Génie Chimique, UMR CNRS 5503, ENSIACET, 5 rue Paulin Talabot, 31106 Toulouse Cedex 01, France

### MEASURING THE EFFICIENCY OF THE TUMBLING MILL AS A ...

Predicted power draw versus mill speeds at 60% mill speed and 50% mill load. .....74 Figure 4.5. The steady-state charge profiles of the 1-m mill with (4 x 4 cm) lifters, 35% ball

### Ball Mill Scale-up Method

Ball Mill Scale-up by this method is known as collision energy based population balance model.The appropriateness of this model is shown for 38-cm ball mill. Comminution in ball mills account for a significant amount of power consumption in mineral processing plants.

### Experimental study on the grinding rate constant of solid ...

Jan 22, 2002 · The selection function S 1 has been investigated by many researchers using a wide variety of grinding mills and conditions , , , , , , and even now, this item is of great interest when considering the grinding efficiency and removal of coarse particles in products.

### ceramics ball mill functions - YouTube

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### Batch Grinding in Laboratory Ball Mills: Selection Function

The principle was tested on the planetary ball mill and the horizontal laboratory ball mill, and according to the results obtained, it can be concluded that the proposed methodology can be useful for the evaluation of the selection function during batch comminution in different mills.

### TECHNICAL NOTES 8 GRINDING R. P. King - Mineral Tech

the mill is used primarily to lift the load (medium and charge). Additional power is required to keep the mill rotating. 8.1.3 Power drawn by ball, semi-autogenous and autogenous mills A simplified picture of the mill load is shown in Figure 8.3 Ad this can be used to establish the essential features of a model for mill …

### motor selection for ball mill - edaboard.com

Mar 09, 2016 · Re: motor selection for ball mill. The Jar will be 10 times the diameter of the steel rod connected to the shaft of the motor. this means the motor should rotate 10 times the jar = 10 * 80 rpm = 800 rpm (motor speed) I am afraid that the fan motor doesnt have enough power to drive the metal rod …