The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum ‘chunk size’, product size as P80 and maximum and finally the type of circuit open/closed ...
calculate sag mill power draw - pokerebooks.nl. The SAG mill pinion energy W SDT (kWh/t) and SAG discharge Bond ball mill work index S d-BWI (kWh/t) are then used to calculate the total energy to grind the ore from 80 passing 152 mm to 80 passing the client specified final product size P 80.This information along with the ore specific gravity is used to calculate necessary mill sizes and ...
Calculation of the power draw of dry multi-compartment ball mills 223 Where gross power is the power input to the motor, no-load power is the power. Published in: Physicochemical Problems of Mineral Processing · 2004Authors: ... how to calculate sag mill ball charge BINQ Mining.
GROSS POWER CALCULATOR General . This model uses the equations from Morrell’s 1993 PhD thesis: “The Prediction of Power Draw in Wet Tumbling Mills”. The model is also described in detail in the book “Mineral Comminution Circuits Their Operation and Optimisation” which is available from the Julius Kruttschnitt Mineral Research Centre.
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 …
Applies to both SAG and ball mills, with variants for grate-discharge and overflow mills. This model was developed as part of the PhD thesis of Stephen Morrell at the University of Queensland and is the model used in the JK SimMet software for determining mill power draw.
Sag Mill Power Calculations livemarketcalls. sag mill power calculations 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 17 mm is used to predict agsag.
Calculation of the power draw of dry multi-compartment ball mills 223 Where gross power is the power input to the motor, no-load power is the power. Published in: Physicochemical Problems of Mineral Processing · 2004Authors: ... how to calculate sag mill ball charge BINQ Mining.
Gross Power Draw and Specific Energy Calculator for Autogenous Grinding (AG), Semi-Autogenous Grinding (SAG) and Ball Mills. Exit Mill Calculator. Shell Sizing Parameters. Parameters. Value . Value . Mill Shell Inside Diameter: [m] [ft] Mill Shell Inside Length: [m] [ft] Shell Heads Cone Angle:
how to calculate circulating load in cone crusher. circulating load for ball mill falastinyatorg circulating load in ball mill crusherpricetop calculate ball mill circulating load pdf A study of simulating Ø Effect of SAG Mill Feed Size Distribution and Ore SAG Mill Load Ball Charge SAG mill power draw was guaranteed by the vendor at 13 ball charge and 30 total volume to be 2096MW .
Applies to both SAG and ball mills, with variants for grate-discharge and overflow mills. This model was developed as part of the PhD thesis of Stephen Morrell at the University of Queensland and is the model used in the JK SimMet software for determining mill power draw.
of the energy required by a SAG mill. Put another way, the SAG mill energy required according to this statement, is 2.5 times more than the Ab value to produce the same degree of particle breakage. There is a speci fi c gravity factor that affects AG/SAG power draw. The lighter material, in the 2.5 specifi c …
Decision-making on selection of SAG mills increasingly uses the methods of sizing the milling power based on laboratory tests on grindability of minerals. This article considers one of such methods allowing determination of mill characteristics based on the Bond work indexes of …
For example, the SAG mill may have 10 MW of power draw available and the two ball mills each of 7.5 MW of power draw available for a total of ratio of 10:15 (1:1.5). The software uses the particular power model (Bond/Barratt, Morrell Mi, etc.) to determine what is the transfer size where the ratio of E SAG to E ball matches the ratio of mill power (1:1.5 in this example).
maximum power draw well below the installed power. Typically, at startup post SAG mill reline, the maximum operable speed ranges are reduced to minimise direct shell impacts due to the steeper face angle of the lifters. This operational approach severely limits available power draw by the mill to maintain higher throughputs for competent ores.
01-01-2016· 9.4. AG/SAG Mill Power. In designing crushing–grinding flow sheets, correct estimations of mill power draw are important as it serves as one of the deciding factors for selecting an option between AG/SAG mills. In most cases, the circuit with the least or optimal power consumption is …
Decision-making on selection of SAG mills increasingly uses the methods of sizing the milling power based on laboratory tests on grindability of minerals. This article considers one of such methods allowing determination of mill characteristics based on the Bond work indexes of …
Power Draw Of Wet Tumbling Mills And Its Relationship To Charge Dynamics - Part 1 A Continuum Approach To Mathematical Modelling Of Mill Power Draw Power Modelling Of Stirred Mills Predicting The Overall Specifcie Energy Requirements Of AG SAG Ball Mill And HPGR Circuits On The Basis Of Small Scale Laboratory Ore Characterisation Tests A ...
maximum power draw well below the installed power. Typically, at startup post SAG mill reline, the maximum operable speed ranges are reduced to minimise direct shell impacts due to the steeper face angle of the lifters. This operational approach severely limits available power draw by the mill to maintain higher throughputs for competent ores.
power draw of AG/SAG and ball mills. Note that the ball mill operating work index is applied only on the portion that needs the additional grinding (Q2), which renders to the AG/SAG mill the credit for the fraction of the material that had been already ground to final product (Q1). To calculate …
Stirred mills were first introduced in the 1950`s as an alternative to ball mills in a regrind application. Since then they have been used to grind a range of materials from limestone to coal to sulfide concentrates. A laboratory tower mill was used to investigate the effect of some variables on the power requirements of a plant mill.
01-01-2016· 9.4. AG/SAG Mill Power. In designing crushing–grinding flow sheets, correct estimations of mill power draw are important as it serves as one of the deciding factors for selecting an option between AG/SAG mills. In most cases, the circuit with the least or optimal power consumption is …
Mill Work Index (RM Wi) tests, and the Bond Ball Mill Work Index (BM Wi) tests. The SAG Power Index (SPI) tests were done at Minnovex Technologies Inc. in Toronto. The MacPherson Autogenous test is done in an 18-inch diameter dry, air-swept Aerofall style mill, by continuously feeding ore that has been crushed to 100 % passing 1.25 inches. The