### The effect of ball size distribution on power draw charge

The effect of ball size distribution increased with increasing mill filling and for the mill filling of 35 the ball size distribution had the maximum effect on the power draw. When the mill charge contained mono-sized balls the ball flow regime inside the mill transited to the cataracting and impact breakage was the main breakage mechanism.

Chat Online### Morrell Method-GMG-ICE-v01-r01 Morrell

· bling mills (AG/SAG rod and ball mills) involved in reducing the size of the primary crusher product to that of the final product (usually the cyclone overflow of the last stage of grinding prior to flotation/leach-ing). 2. Feed rate to the circuit (dry tonnes/h) 3. Power draw

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· CALCULATION OF THE POWER DRAW OF DRY MULTI–COMPARTMENT BALL MILLS and mill load volume the mill is filled with balls to 80 percent of its » Free online chat how to calculate the media in ball millCGM Grinding Plant. CALCULATION OF THE POWER DRAW OF DRY MULTI–COMPARTMENT BALL MILLS. 20 mm Tumbling ball mills balls

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Ball Mill Calculations Ball Mill. Ball Mill Motor Power Draw Sizing And Design Formula The following equation is used to determine the power that wet grinding overflow ball mills should draw for mills larger than 33 meters 10 feet diameter inside liners the top size of the balls used affects the power drawn by the mill this is called the ball size factor s rod and ball mills by ca rowland and

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· 47th ©Annual Canadian Mineral Processors Operators Conference Ottawa Ontario January 20-22 2015 INTRODUCTION Conventional low throughput grinding options consisting of multi-stage crushing followed by rod and ball mills have almost become obsolete in the move to higher milling rates required to process lower

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· shaft with side arms attached to it. The ball to charge ratio may be 5 1 10 1 15 1. This method is more efficient in achieving fine particle size. Rod mills Horizontal rods are used instead of balls to grind. Granularity of the discharge material is 40-10 mm. The mill speed varies from 12 to 30 rpm.

Chat Online### The dependence of specific discharge and breakage rate

· This model structure is proposed for multi-compartment ball mills for the calculation of breakage (r) and discharge rate (d) functions in different segments of the mill using the experimentally measured mill inside size distributions (p 1 and p 2) and calculated mill feed and discharge size distributions (p 3) in addition to segment hold-up (s 1 s 2 s 3 and s 4).

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· "Black Box" (Generic) Circuit Calculation Circuit dry tonnage = 450 t/h . Power draw Standard of mill(s) ( pinion(s)) = 3 150 kW . Circuit Feed F80 =2 500 µm . Circuit Product P80 = 212 µm . Test WI of circuit feed ore = 16.1 kWh/t (The Bond ball mill test Work Index of the ore whichapplies over the size reduction range of this circuit)

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· Mill power draw prediction can be carried out using Morrell s power model for tumbling mills (Morrell 1998). Bond method The established technique for determining power requirements for ball mills is the Bond method (Bond 1961). This method also involves the application of some efficiency factors as described by Rowland (1975).

Chat Online### Comparison between bond crushing energy and fracture

· mills and demonstrated that despite the fact that the DEM simulations are based on two dimensions (2D) the technique is able to predict the power draw of mills with reasonable accuracy over a wide range of mill diameters2 3. More than 10 years since then the DEM technique has been successfully applied to ball mills4–7 SAG mills8–10 and

Chat Online### Morrell Method-GMG-ICE-v01-r01 Morrell

· bling mills (AG/SAG rod and ball mills) involved in reducing the size of the primary crusher product to that of the final product (usually the cyclone overflow of the last stage of grinding prior to flotation/leach-ing). 2. Feed rate to the circuit (dry tonnes/h) 3. Power draw

Chat Online### Effects of slurry filling and mill speed on the net power

· The theoretical power draw model of a mill or Morrell s power model is an elegant solution to mill power modelling. It has the merit of treating autogenous semi-autogenous and ball mills as one single class of devices for which the power draw could be predicted with the same equations.

Chat Online### Experimental investigation of the power draw of tumbling

· A power analyser was utilized to measure mill power. Increase in mill speed and ball filling leads to a remarkable increase in the amount of the power. Preliminary results show that there is a definite trend between the power and the slurry filling U. Mill power draw is maximum at slurry concentration 60–70 and slurry filling 0.84.

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· Ball Mill Power Calculation Example A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80 passing ¼ inch (6350 microns).

Chat Online### Ball Mill Design/Power Calculation911 Metallurgist

· Example Calculation. A motor with around 1400 Horse Power is calculated needed for the designed task. Now we much select a Ball Mill that will draw this power. The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution

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· through the Reclamation Power Resources Office in Denver and via the Manuals and Standards development program. The authors gratefully acknowledge the assistance of all who contributed. Hydroelectric Research and Technical Services Group Denver Colorado April 2005

Chat Online### The dependence of specific discharge and breakage rate

· This model structure is proposed for multi-compartment ball mills for the calculation of breakage (r) and discharge rate (d) functions in different segments of the mill using the experimentally measured mill inside size distributions (p 1 and p 2) and calculated mill feed and discharge size distributions (p 3) in addition to segment hold-up (s 1 s 2 s 3 and s 4).

Chat Online### Morrell Method-GMG-ICE-v01-r01 Morrell

· bling mills (AG/SAG rod and ball mills) involved in reducing the size of the primary crusher product to that of the final product (usually the cyclone overflow of the last stage of grinding prior to flotation/leach-ing). 2. Feed rate to the circuit (dry tonnes/h) 3. Power draw

Chat Online### GMSG GUIDELINE DETERMINING THE BOND EFFICIENCY

· "Black Box" (Generic) Circuit Calculation Circuit dry tonnage = 450 t/h . Power draw Standard of mill(s) ( pinion(s)) = 3 150 kW . Circuit Feed F80 =2 500 µm . Circuit Product P80 = 212 µm . Test WI of circuit feed ore = 16.1 kWh/t (The Bond ball mill test Work Index of the ore whichapplies over the size reduction range of this circuit)

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Improving Thermal and Electric Energy Efficiency at Cement Plants International Best Practice iii LIST OF FIGURES Figure 1 Cement Production Process Flow Schematic and Typical Energy Efficiency Measures .. 2 Figure 2 Rotary Cement Kiln (Dry Process with Cyclonic Preheaters) .. 4 Figure 3 Schematic Depiction of Control Points and Parameters in a Kiln System Control and Management

Chat Online### Comparison between bond crushing energy and fracture

· mills and demonstrated that despite the fact that the DEM simulations are based on two dimensions (2D) the technique is able to predict the power draw of mills with reasonable accuracy over a wide range of mill diameters2 3. More than 10 years since then the DEM technique has been successfully applied to ball mills4–7 SAG mills8–10 and

Chat Online### Orway Mineral Consultants Canada Ltd. Mississauga ON

· 47th ©Annual Canadian Mineral Processors Operators Conference Ottawa Ontario January 20-22 2015 INTRODUCTION Conventional low throughput grinding options consisting of multi-stage crushing followed by rod and ball mills have almost become obsolete in the move to higher milling rates required to process lower

Chat Online### The dependence of specific discharge and breakage rate

· This model structure is proposed for multi-compartment ball mills for the calculation of breakage (r) and discharge rate (d) functions in different segments of the mill using the experimentally measured mill inside size distributions (p 1 and p 2) and calculated mill feed and discharge size distributions (p 3) in addition to segment hold-up (s 1 s 2 s 3 and s 4).

Chat Online### Ball Mill Design/Power Calculation911 Metallurgist

· Example Calculation. A motor with around 1400 Horse Power is calculated needed for the designed task. Now we much select a Ball Mill that will draw this power. The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution

Chat Online### Orway Mineral Consultants Canada Ltd. Mississauga ON

· 47th ©Annual Canadian Mineral Processors Operators Conference Ottawa Ontario January 20-22 2015 INTRODUCTION Conventional low throughput grinding options consisting of multi-stage crushing followed by rod and ball mills have almost become obsolete in the move to higher milling rates required to process lower

Chat Online### Comparison between bond crushing energy and fracture

· mills and demonstrated that despite the fact that the DEM simulations are based on two dimensions (2D) the technique is able to predict the power draw of mills with reasonable accuracy over a wide range of mill diameters2 3. More than 10 years since then the DEM technique has been successfully applied to ball mills4–7 SAG mills8–10 and

Chat Online### GMSG GUIDELINE DETERMINING THE BOND EFFICIENCY

· "Black Box" (Generic) Circuit Calculation Circuit dry tonnage = 450 t/h . Power draw Standard of mill(s) ( pinion(s)) = 3 150 kW . Circuit Feed F80 =2 500 µm . Circuit Product P80 = 212 µm . Test WI of circuit feed ore = 16.1 kWh/t (The Bond ball mill test Work Index of the ore whichapplies over the size reduction range of this circuit)

Chat Online### Morrell Method-GMG-ICE-v01-r01 Morrell

### Cement Grinding OptimizationSlideShare

· Mill power draw prediction can be carried out using Morrell s power model for tumbling mills (Morrell 1998). Bond method The established technique for determining power requirements for ball mills is the Bond method (Bond 1961). This method also involves the application of some efficiency factors as described by Rowland (1975).

Chat Online### Ball Mill Design/Power CalculationLinkedIn

· Ball Mill Power Calculation Example A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80 passing ¼ inch (6350 microns).

Chat Online### The dependence of specific discharge and breakage rate