Which power model is the most efficient to predict the correct power consumption in sag mill with change in process variables?I have developed a few dynamic simulators for different mineral/metal processing plants Prediction of correct sag mill power consumption with a change in ore hardness, solid

[More]CALCULATION OF THE REQUIRED SEMIAUTOGENOUS MILL POWER BASED ON THE BOND WORK INDEXES O I SKARIN, Senior Researcher, Candidate of Engineering Sciences N O TIKHONOV, Head of Subdivision Optimization of ore pretreatment and selection of the ap-propriate equipment is one of the main areas of activity of RIVS Science and Production Association

[More]The grind curve work of Powell and Mainza (2006) and Powell et al (2009) demonstrated that the optimal volumetric mill filling for maximum federate does not necessarily align with maximum power draw, especially for high aspect SAG mills

[More]2 A SAG mill operates with a 10,000 hp motor Typical power draw is 80% of maximum The 80 percent passing feed size to the mill is 6 inches and the mill discharge has an 80 percent passing size of 23 mm Calculate the Operating Work Index for this mill if the feed tonnage rate is 1175 tonnes per hour

[More]It is imperative to ensure the efficient removal of both slurry and coarse pebbles (critical size) in order to ensure the efficient operation of AG/SAG mills Elimination of the above mentioned material transport problems will allow the mill to respond truly in terms of power draw for changes in mill load which depends on feed ore characteristics

[More]Water addition is an important variable for control of mill power draw This has to be considered along with ore feed rate to safeguard the maximum power constraint of the mill and to maintain constant slurry density at the mill discharge, since this signifies stable operation but also safeguards mill and pump liners from excessive wear or damage

[More]Development of models relating charge shape and power draw to SAG mill operating parameters and their use in devising mill operating strategies to account for liner wear , Its biggest advantage though is that mill power draw is always known for all operating mill so it is very easy to use as a control variable

[More]predicted Slurry pooling causes the power draw in AG and SAG mills to be lower than a mill without a slurry pool This phenomenon results in overflow mills usually drawing less power than grate discharge mills that are operating without a slurry pool This is because by definition overflow mills operate all of the time with a slurry pool

[More]expensive to draw more power per ton than operate the pebble crusher) SAG Mill Ball Charge The SAG mill was simulated to require a 10-12% ball charge with a top size of 125mm During the commissioning phase no balls were required to be added to the SAG mill to achieve the target throughput of 575tph

[More]What is more, stabilizing the load in the mill also stabilizes power draw This enables the operator to manage power usage, eliminat - ing the energy waste that comes with a varia - tion in the power draw The challenge: To control your , BrainWave: Control solutions for SAG mills .

[More]mining ore sag mill power draw Mineral Processing EPC Mar 31, 20180183;32;Ball Mill, Ball Mill Suppliers and Manufacturers at mining ore sag mill power draw Mining Grinding Ball Mill for Ore/Ball Mill Machine Best seller Low Power Consumption factory steel ball mill for grinding copper magnetite chromite ore size

[More]SAG milling Process control abstract The operation of AG/SAG mills is sensitive to mill ﬁlling, therefore developing grindcurves to relate mill ﬁllingto performance indicatorssuch as throughput,power draw, and product size can assist in achieving optimal mill operations The throughput, power draw, and product size have been shown to peak .

[More]SAG mill power draw models using techniques of Austin and Morrell, Ball mill power draw models using techniques of Morrell and The combination of a database capable of tracking thousands of grindability test results with models that can run hundreds of samples per second make the SAGMILLINGCOM grindability models ideal for geometallurgy

[More]SAG mills use a ball charge of 8 to 21% The largest SAG mill is 42' (128m) in diameter, powered by a 28 MW (38,000 HP) motor A SAG mill with a 44' (134m) diameter and a power of 35 MW (47,000 HP) has been designed Attrition between grinding balls and ore particles causes grinding of finer particl SAG mills are characterized by their .

[More]The results measurements of the power draw and ﬁnes production in also suggest that the intensity of normal pressure which a pilot scale AG/SAG mill (Loveday, 2004), in order to exists at contacts between rock ball and steel ball, varies facilitate interpretation of the detailed experimental results

[More]WAG/SAG, WBM are the respective 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 ,

[More]Power draw of wet tumbling mills and its realtionship to charge dynamics Part 2 an empirical approach to modelling of mill power draw Tran Inst Min Met Vol 105: C54-62 20 MORRELL, S (1996) Power draw of wet tumbling mills and its relationship to charge dynamics Part 1 a continuum approach to mathematical modelling of mill power draw

[More]Tenova TAKRAF supplies Unique SAG Mill in Canada MINING Feb 21, 2013 The mill is a conventional SAG (semi-autogenous grinding) mill in all ways on a SAG mill, with 950kW of power, torque of 1200 kNm (start-up) and 650 their integrity when exposed to high torsional loads during operation and, Tenova is a worldwide supplier of advanced technologies, products, and

[More]power draw The most frequently used power-based methodologies for calculating energy requirements for comminution circuits using AG/SAG mills are concisely presented in the following section This paper describes the Orway Mineral Consultants (OMC) approach determining power requirements for thto e

[More]The voltage always is consistent and there is no significant process change during SAG mill operation" I understand from this that you have an approximate 20A current draw difference between the two motors? I also assume that 7300kW is the TOTAL mill power draw, or is it the power draw of EACH motor?

[More]The slurry level in AG/SAG and ball mills has an influence on their power draw, which in some instances can be profound This is particularly the case with so-called slurry pooling in AG/SAG mills which can result in significant lowering of power draw

[More]Figure 2 SAG mill simulator in Matlab-Simulink 31 Results Examples of the simulation results are presented in Figures 3 and 4 These figures respectively show the response of the power-draw and the fill level for the Magne approach [3] The results are the product of 10% flow change related to the nominal operation conditions (1200 t/h ) 4

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