### AG Autogenous & SAG Semi-Autogenous Mill Design

Table of ContentsSAG Mill ChargeSAG Mill Horsepower — Drive PowerOre Testing for AG & SAG Grinding Mill Design Mill Sizing: After laboratory and pilot plant testing confirm the feasibility of autogenous or semi-autogenous grinding, it can be used to establish the exact grinding circuit and mill size. In the pilot plant tests, the tare power of the pilot plant mills should be determined

### Modelling SAG milling power and specific energy

In general these equations are used to predict power consumption as a function of mill size, level and density of the internal charge and % of critical speed. Almost none of these equations (with the notable exception of the Morrell’s model) consider explicitly the effect that the feed particle size has on the mill performance, particularly on the power and on the specific energy consumption of the mill.

### Modelling SAG milling power and specific energy

1/1/2015· Fig. 1. SABC A/B milling circuit. Scw = solid concentration by weight fraction in the SAG mill feed; Jb = balls charge (bulk fraction of the SAG mill volume); N / Nc = fraction of the SAG mill critical speed; Pc = SAG mill power consumption (kW); % −6″ +1″

### Power-based comminution calculations using Ausgrind

• The SAG Power Index (SPI) test was developed by Starkey and Dobby (Starkey and Dobby, 1996) as the AG/SAG equivalent to the work index test. A SAG mill is operated in closed circuit

### (PDF) Power-based comminution calculations using Ausgrind

Published by the Canadian Institute of Mining, Metallurgy and Petroleum AG/SAG mill performance is commonly measured and evaluated by means of the AG/SAG specific energy (kWh/t), which is often

### GROSS POWER CALCULATOR SMC Testing

calculations by the user. If the mill has cone ends the model automatically calculates the volume of the cone ends as well as the volume of balls/rock in the cone ends from the cylindrical section data that the user inputs. In SAG mills the total filling relates to the combined rock and ball volume (including voids),

### Power-based comminution calculations using Ausgrind

• The SAG Power Index (SPI) test was developed by Starkey and Dobby (Starkey and Dobby, 1996) as the AG/SAG equivalent to the work index test. A SAG mill is operated in closed circuit

### GROSS POWER CALCULATOR SMC Testing

calculations by the user. If the mill has cone ends the model automatically calculates the volume of the cone ends as well as the volume of balls/rock in the cone ends from the cylindrical section data that the user inputs. In SAG mills the total filling relates to the combined rock and ball volume (including voids),

### (PDF) Power-based comminution calculations using

Published by the Canadian Institute of Mining, Metallurgy and Petroleum AG/SAG mill performance is commonly measured and evaluated by means of the AG/SAG specific energy (kWh/t), which is often

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

total circuit specific energy is the sum of the SAG mill and ball mill specific energies. W SAG = R.(Ms+16000)/(Ms.447.3) (4) W T = K a.K b.W SAG.[10.BWi.(T 80-0.5-1700-0.5).EF5] + W BM.K BM (5) Where: W SAG = SAG mill specific energy from F 80 152 mm to T 80 1.7 mm (kWh/t) R = SAGDesign test mill revolutions (revs)

### CMD Consulting uses Rocky DEM power calculations to

SAG mill design CDM Consulting used to test Rocky DEM power draw Empirical Model Rocky DEM Model Figure 1 Morrell C-model for mill power draw Rocky calculations for power draw were shown to accurately replicate Morrell’s C-model for power draw, an increasingly critical component in mill

### e model calculations for ball mill power draw by steve

Modelling SAG milling power and specific energy. exception is the Morrell s model (Morrell 2008 2009). In his approach the total speciﬁc energy of the entire AG/SAG circuit is ﬁrstly predicted using the SAG mill feed F80 and the ball mill cyclone overﬂow P80. Morrell s model. Get Price.

### A comparative

The power calculations do not include any additional design factors. The installed power was estimated based on the recommendation by Doll (Doll, 2012) considering the various power losses in the transmission system. The estimated SAG mill power includes a correction for the interstitial mill filling. In the case of the estimated ball

### A Method of C alculating Autogenous/ Semi-Autogenous

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.

### USING THE SMC TEST® TO PREDICT COMMINUTION CIRCUIT PERFORMANCE

AG/SAG mill and crusher circuit simulations through the use of JKSimMet. Independent of this it can be used in power-based calculations, which in conjunction with the Bond ball work index test, enable the prediction of the specific energy of comminution circuits where such circuits include combinations of any of the following equipment:

### FREDA REBECCA SAGMILLING CIRCUIT OPTIMIZATION

Installing a 1000kW regrind ball mill increased plant capacity by 56% through treating 29% of the cyclone underflow and reduced the SAG mill specific energy from 20.66 to 16 kWh/t and the investment has a payback period of 1 year and a month, in 10 years the project would have earned the

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