calculate sag mill power draw

2021 6 6 · Feed rate was initially controlled by the SAG mill power draw with bearing pressure as override Integral with the grinding circuit is a 1500 cubic meter capacity agitated surge tank equipped with level sensors and variable speed pumps This acts as a buffer between the grinding circuit and the flow rate sensitive cycloning and thickening sections A mill power equation for SAG

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equivalently powered 42 ft SAG mill Newmont made the decision in 2021 to purchase a 42 ft SAG mill from and a 28 MW GMD from ABB THE MILL Needless to say reliability is a key word at every stage of the project Although mill structure failures have not occurred in large GMD SAG mills the mill design was not exempt from a reliability survey This survey or assessment was carried

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These heavy output SAG mills are usually powered by electricity As requirements and needs in grinding field are enhanced Improved SAG mills came in trend which gives highly rated production These mills are one of the most used and necessary equipment in grinding Image Source Working SAG mill make use of steel balls included with some large and hard rocks for grinding These mills

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Power Based Sag Mill Design Calculations ball mill power consumption formula SAG product will draw more power from the SAG Mill and less power from the Ball Mill Chat Online Choosing a SAG Mill to Achieve Design Performance Get Price Sag in Overhead Conductor Electrical4U tools tools Login Register tools Home Calculations Mill Critical Speed Calculation Estimates the critical speed of a

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The model output variables are power draw load level ball load mineral discharge rate and size distribution water discharge rate ball throughput bearing pressure pebble throughput and toe and shoulder angles of the internal load SAG mill model The particles fed to the mill are ground in the milling chamber and subsequently

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GROSS POWER CALCULATOR General slurry pool is predicted from mill design and slurry flow data and its impact on power draw is then predicted Slurry pooling causes the power draw in AG and SAG mills to be lower than a mill without a power draw of an AG SAG mill to drop can be gauged by switching the discharge mechanism choice in Application of Operating Work Indices in Autogenous SAG and the

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A 35% decrease in the SAG mill power draw from 3 908 HP to 2 526 HP 2 915 kW to 1 884 kW was recorded This equates to a 47% decrease in SAG unit energy consumption from kWh/ton to kWh/ton A 11% decrease in SAG mill speed was observed indicating optimized ball strikes

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In a semi autogenous grinding SAG mill and pebble crusher circuit the behaviour of the comminution process is non linear and time varying due to wear and variations in the feed material To describe such a complex system data driven models were introduced along with a case study of a SAG mill circuit in Copper Mountain British Columbia Canada This paper presented a mill power draw

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The presence of a sizable quantity of pebbles in the pulp lifter limits the space available and reduces the flow gradient through the grate thus increases the load inside the mill and hence the mill power draw This paper analyses all the problems associated in discharge of slurry and pebbles in SAG mills with pebble circuits The Outokumpu patented Turbo Pulp Lifter TPLTM aims at

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These heavy output SAG mills are usually powered by electricity As requirements and needs in grinding field are enhanced Improved SAG mills came in trend which gives highly rated production These mills are one of the most used and necessary equipment in grinding Image Source Working SAG mill make use of steel balls included with some large and hard rocks for grinding …

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up and load solid percent on the power draw of Miduk SAG mill In above formula speed sp and load are specific power draw kwh/t mill rotational speed Get Price THE DEVELOPMENT OF A DYNAMIC MODEL FOR AUTOGENOUS Jan 17 2021 For effective AG/SAG mill operation and control the measurement and control of The power model equation has the following form gin Get Price

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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 Ball Mill Design/Power Calculation 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

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The combined power draw of the SAG mill and ball mill was 8658 kW which caused partial over grinding From experience in processing plants outside of China the power rating of the ball mill should be higher than that of the SAG mill [5] The pebble crusher had an over powered configuration The installed power draw of 630 kW actual power draw of kW is over sized and therefore had a

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The power draw volumetric filling level and a size reduction percentage were the controlled variables while the fresh ore feed rate fresh water feed rate and the SAG rotation speed were the manipulated variables The controller response showed a suitable control behavior independent of the noisy multivariable modification KW Mill control

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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 variation in the mill ore charge volume and somewhat less than optimal power draw Online Chat calculating sag mill power The power draft is more or less symmetrical about the 50 value A simple equation for calculating net power draft

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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 From a predictive viewpoint there are currently no published models that explicitly describe the influence of slurry level on power draw and

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SAG mill ball charge determination and its influence on mill drive requirements Abstract In semi autogenous grinding SAG the grinding mill inventory volume of total charge volume of ball charge etc is important in determining the optimum operating condition for maximum production tph minimum specific energy kwh/t or lowest cost $/t

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Take mill power draw product throughput and conversion costs into consideration when converting a ball mill Grinding mills including SAG semi autogenous grinding mills and ball mills consume approximately 60 70% of the total energy cost of the entire mining operation The mills are installed with large motors up to 20 MW which impart the required energy to successfully process

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Both mills use two 9 000 hp variable frequency drives so the SAG mill will probably not draw the full nameplate horsepower It probably will only draw about 14 500 horsepower at the top end However we were able to keep capital costs down by only purchasing one spare motor New meets old again as the ore makes its way towards flotation cells in the regrind circuit where the design has

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A further explanation is required to explain the importance of designing the SAG mill chamber to draw required power at optimum operating conditions of 75% critical speed and less than 30% by volume load Recent studies in the three foot diameter SAG mill are instructive The following graph shows the relevant facts as Figure 2 GROSS POWER CALCULATOR SMC Testing slurry pool is predicted

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The aim of this paper was to investigate on the effect of different parameters such as rotational speed hold up and load solid percent on the power draw of Miduk SAG mill Miduk copper concentrator is located in Kerman Province Iran and its size reduction stage includes one gyratory crusher which feeds one SAG mill dia m length m following two parallel ball mills 5 dia m

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A 35% decrease in the SAG mill power draw from 3 908 HP to 2 526 HP 2 915 kW to 1 884 kW was recorded This equates to a 47% decrease in SAG unit energy consumption from kWh/ton to kWh/ton A 11% decrease in SAG mill speed was …

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up and load solid percent on the power draw of Miduk SAG mill In above formula speed sp and load are specific power draw kwh/t mill rotational speed Get Price THE DEVELOPMENT OF A DYNAMIC MODEL FOR AUTOGENOUS Jan 17 2021 For effective AG/SAG mill operation and control the measurement and control of The power model equation has the following form gin …

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Starkey SAG test grinding SAG milling ore hardness Bond Work Index mill design mill power draw Created Date 19971222120948Z

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By allowing the SAG mill to be operated safely at higher power draws the feed rate has increased by 15 tph Assuming a Zn price of $3 300 AUD per metric tonne and a head grade of 6% this equates to $70 000 AUD of extra metal entering the concentrator over 24 hours SAG Mill Power / Load Control Customer Glencore Mount Isa Mines Zinc Operations Location Mount Isa Australia Project

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The SAG mill had a 6 8% ball charge and the power consumption was 8 kWh/t which agreed well with the expected value Problems In an SAG mill the dimensions of the mill were m × m and the specific gravities of the mineral and that of the balls charged were and respectively

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The SAG and ball mills power draw is calculated using semiempirical equations as a function of mill geometry speed and load • The SAG Power Index SPI test was developed by Starkey and Get Price SAG Mill Official Feed The Beast Wiki 19102020 Power Use 80% means a recipe will only require 80% of its default energy cost to be processed However the SAG Mill always s at a set energy

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where two SAG mill power models are developed The first model calculates the mill power draw by combining several individual data driven algorithms The second model uses historical data to forecast the mill power draw in advance These data driven methods can make high accuracy predictions based on a specific plant dataset and find complex nonlinear relations between input variables and

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SAG power draw survey tabulation This LibreOffice spreadsheet contains the raw data used to create Table 1 and Table 2 of the paper An updated data set for SAG mill power model calibration presented at IMPC 2021 in Quebec City Canada in September 2021

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sag indonesia raymond mill power draw preschoolpresby Sep 15 2017For the mill with higher mill load and lower speed the power draw of the mill differed International Education Rocky Mountain the American Indonesian Maximizing media drop height to maximize impact grinding in AG/SAG mills Get Price ; bond equation for recirculating load on a ball mill ball mill power draw calculation

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The SAG mill power draw model of Austin using the calibration by Doll 2021 Inquire Now; TECHNICAL NOTES 8 GRINDING R P King TECHNICAL NOTES 8 GRINDING R P King 8 2 S Power draw of wet tumbling mills and its LG A mill power equation for SAG mills Inquire Now; SAG Mill Power Model Grinding & Classification Circuits Prediction of correct sag mill power consumption with

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SAG Mill power draw models are used in mill design and grinding circuit modelling to predict Ball charge is not explicitly used in the power formula but is considered in the mill charge density formula 1 3 EXAMPLE CALCULATION Read more UBC MINE331 Lecture Notes Oct 4 2021 SUBJECT SAG MILL More Calculation of Sag & Tension in Transmission Line for 26/05/2021

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