# Calculating Sag Mill Power

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### Power Calculation Formula Of Sag Mill

Power Calculation Formula Of Ball Mill (1986) proposed the use of an empirical formula for predicting SAG power involving the use of a combination of Bond work indices over a range of sizes from F 80 to a defined P 80 applying a correction factor to resultant power and deducting the ball milling component of the power refer to Equation 2

### sag mill power cost calculations

Sag Mill Power Cost Calculations. GROSS POWER CALCULATOR SMC Testing GROSS POWER CALCULATOR General calculations by the user If the mill has cone ends the model automatically calculates the volume of the the model from grate to overflow when predicting the power draw of an AGSAG mill smctesting 4 Figure 1 Measured vs Predicted Motor Input …

### power calculation formula of sag mill - bandrawinefestival.in

01/01/2015 SAG mill power consumption (Pc) in kW, in 4 grinding circuits (GC1 to GC4) at different % of the fresh feed in the size range −6″ +1″ (−152 +25 mm). It is important to notice that the behaviour shown in Fig. 4 is affected by the dependence of the power consumption on the mill sizes.

### calculating sag mill power

About calculating sag mill power-related information:piping and pipeline engineering mechanical engineering a series of textbooks and reference books founding editor ... Know More. power calculation formula of sag mill - Calculating Power Draw when sizing Ball Mills ... In addition, a laboratory mill was designed and constructed in order to ...

### SAG Calculator | Edmund Optics

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### Modelling SAG milling power and specific energy …

This distribution affects the SAG mill load and the load affects directly the mill power and the efficiency of the mill operation (Van Nierop and Moys, 2001). If a SAG mill has been designed with a conventional power or specific energy model which do not consider the projected feed size distribution it is likely that this mill will reach the ...

### Ball Mill Design/Power Calculation

Ball Mill Power Calculation Example #1. 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). The required product size distribution is to be 80% passing 100 mesh (149 microns). In order to determine the power requirement, the steps ...

### A Mill Power Equation For Sag Mills - evert-bioenergie.de

A Mill Power Equation For Sag Mills. stage ball mills rod mills or AGSAG mills when calculating power according to the Bond Third Theory method Rod mill and AGSAG mill products are similar and tend to be not as steep as a 05 slope when plotted on loglog paper

### Methods to Estimate AG/SAG Mill Power Requirements

A linkedin.com group was recently discussing this by asking: I've tried to estimate AG/SAG Mill power requirements using several different methods: (1) Using the results of SMC data. (2) Using SAG Power Index (SPI) data. (3) Using the 1989 Barratt method updated on Alex Doll's Web site (February 16, 2015)

### calculating sag mill power

SAG mills mimic the same shortcoming. It follows that in order to obtain the speciﬁ c energy (SE) to achieve a certain transfer size, based on the 80 per cent passing value, an inefﬁ ciency factor must be applied to the SE of single stage ball mills, rod mills or AG/SAG mills when calculating power according to the Bond Third Theory method.

### power calculation formula of sag mill

power calculation formula of sag mill. Grinding Mill Computer Model. Approximate mill diameter is derived from Power =5 6115 DL24 6 La= D where a is the aspect ratio L/D derived from a regression equation on 25 manufacturers mill size and power relationships For SAG mills the equation becomes Power= 5.6115 balls 0.1438 D24 6 L Mill Critical ...

### A mill power equation for SAG mills | SpringerLink

where m p is in kW; D is internal mill diameter (meters), L is internal mill length (meters); J is total fractional charge loading of the mill; J B is the fractional mill filling by balls; ε B is the effective porosity of the charge, taken as 0.3; ρ s and ρ b are true densities of rock and balls (tons per cubic meter), respectively; w c is the weight fraction of rock in water and rock in ...

### Sag And Sag Mill Power Calculation - steffi-gruebler.de

power based sag mill design calculations. Power Based Sag Mill Design Calculations. classify the agsag mill product into two products the phantom cyclone overflow that is similar to the final ball mill product, and the phantom cyclone underflow is then used as an adjusted ball mill feed for the ball mill power calculationhis technique is specifically suitable for model-based ...

### SAG Mill Grinding Circuit Design - Mineral Processing

Incidentally the design calculation of the deformations of journal and mill shell is based on static conditions, the influence of the rotating mass being of less importance. ... The original SAG mill control loop, a mill motor power draw set point of 5200 Amperes controlling the coarse ore feeder speeds, was soon found to give excessive ...

### Sample Calculation of Sag and Tension of Transmission …

This is an example calculation for sag and tension in the transmission line. You may opt to review first the fundamental principles and formulas from this post.. The foregoing calculation is based on the linear cable model on which plastic elongations are ignored. Also, the loading of the conductors is based on the National Electrical Safety Code 2017.

### Ball Mill Parameter Selection & Calculation - Power, …

1 Calculation of ball mill capacity. The production capacity of the ball mill is determined by the amount of material required to be ground, and it must have a certain margin when designing and selecting. There are many factors affecting the production capacity of the ball mill, in addition to the nature of the material (grain size, hardness, density, temperature and …

### calculate sag ball mill circulating load

Mainly in USA the term circulating load is more often used than the circulation ating load is percentage of coarse return in relation to fines it can be calculated by Coarse return TPH X 100 Mill output range of cirulating load in a conventional close …

### Calculating Sag Mill Power

The "Critical Speed" for a grinding mill is defined as the rotational speed where centrifugal forces equal gravitational forces at the mill shell's inside surface. This is the rotational speed where balls will not fall away from the mill's shell. Result #1: This mill would need to spin at RPM to be at critical speed. Result #2: This mill's ...

### power calculation formula of sag mill - fleron-services.be

sag mill power calculations. power calculation formula of sag mill - applemartcoin A Method to Determine the Ball Filling, in Miduk Copper calculated for 3 different conditions include maximum. 【Service Online】 SAGMILLINGCOM : Mill Critical Speed Determination

### Modelling SAG milling power and specific energy …

In this study, considering different operational parameters for stirred media mill, change in specific energy was compared to the change in R x values, i.e. the cumulative weight of the material undersized to a specific sieve. R values, namely R 38, R 75, R 106, were measured before and after grinding in stirred mill.The change in R x (ΔR x, %) values were calculated …

### how to calculate mills and crushers power requirement

End Milling • Force, Torque, And Power. A e d 1 ratio of radial width of cut to cutting diameter: calculated required power. f t tangential cutting force: lb n. t torque at the cutter: in.lb nm. machining power. p s at the cutter: hpc kw. p m at the motor: hp kw. these calculations are based upon theoretical values and are only intended for planning purposes. actual results will …

### Calculate Sag Mill Power Draw

power draw of an AG/SAG mill to drop can be gauged by switching the discharge mechanism choice in the model from grate to overflow when predicting the power draw of an AG/SAG mill. 4 Figure 1 – Measured vs Predicted Motor Input Power …

### GROSS POWER CALCULATOR - SMC Testing

power draw of an AG/SAG mill to drop can be gauged by switching the discharge mechanism choice in the model from grate to overflow when predicting the power draw of an AG/SAG mill. 4 Figure 1 – Measured vs Predicted Motor Input Power . 0 2000 4000 6000 8000 10000 12000 14000

### power calculation formula of sag mill

The SAG Power Index (SPI) test (Starkey & Dobby, 1996) uses a benchscale SAG mill test to determine the specific energy of an industrial SAG mill. The test is operated in closed circuit and the time required to grind the material to a P 80 of 1.7 mm is used to predict AG/SAG

### Calculating Sag Mill Power

Calculating Sag Mill Power. module3 - appe - sag mill power draw,unlike rod or ball mills, determining the power draw characteristics of sag mills the following formula can be used to calculate sag mill power draw as a.calculate a mill's operating work index, formula to calculate a ball mill, rod mill or sag mill operating work index. based on fred bond's work you can estimate …

### Orway Mineral Consultants Canada Ltd. Mississauga, …

The SAG Power Index (SPI) test (Starkey & Dobby, 1996) uses a benchscale SAG mill test to - determine the specific energy of an industrial SAG mill. The test is operated in closed circuit and the time required to grind the material to a P 80 of 1.7 mm is used to predict AG/SAG specific energy using Equation

### calculating sag mill power

Calculating Sag Mill Power bierzelt-2011.de. Obviously, the SAG mill is consuming more and the ball mill less power than was predicted by the empirical method, but the overall total is 99.5% of the predicted total. Examples The Hemlo gold project of Teck-Corona (1000 mtpd) provides an example of mill sizing using the empirical calculation . More

### power calculation formula of sag mill

Ball Mill Design/Power Calculation - LinkedIn. 12-12-2016 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). More

### sag mill power calculations - Welcome to Tables & Thyme

LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62. Gross power No load power Net power drawn by the charge (8.13) The net power is calculated from Net power KD2.5L e! c./ Watts (8.14) In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the ...

### Grinding Mill Power Calculation

Dec 12, 2016 183 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 188 inch 6350. Read More Calculation Of Power For Ball Mills And Grinding EXODUS . Calculation Of Power For Ball Mills And Grinding. ...

### SAG Mill Power Model - Grinding & Classification Circuits ...

Prediction of correct sag mill power consumption with a change in ore hardness, solid percent (density) to the sag feed, rpm of sag and PSD has always been very tricky. So far, I have used Austin-Morrell model and Hogg- Fuerstenau power model, but these models seem to work well only under certain boundary conditions.