SAG Mill power draw models are used in mill design and grinding circuit modelling to predict how much power will be consumed by a particular mill geometry and operating configuration This paper will compare SAG mill models by Morrell, Loveday (using "Power Numbers" published by Barratt) and Austin against several published mill surveys

Get Price1, are used in AG/SAG mill modelling for predicting how rocks break inside the mill From this description the model can predict what the throughput, power draw and product size distribution will be Figure 4 – Drop-weight Tester The standard JK drop-weight test normally needs at least 75 kgs of raw material and hence

Get PriceDraw (MW) 103 109 109 110 125 120 Mill speed (%Nc) 68 71 70 70 78 78 Mill noise (dB) 49 50 51 51 60 57 • Remarks • The SAG mill operating with design 2 & 3 liner systems improved the overall performance • Design 2 liner package was the heaviest –which resulted in reduced operable charge volume • Increasing the likelihood of .

Get PriceSAG Mill ore hardness kWh/t: Energy required to grind an ore from F80 of 152 mm to T80 of 17 mm It is a resulting value from the SAGDesign test No other test accurately reports SAG hardness in kWh/t The required SAG energy is calculated using the Bond Wi to adjust , power draw (and throughput) with liner redesign is not realistic SAG .

Get PriceA line drawing of the Fort Knox SAG mill liner configuration and spare liners awaiting installation Five and one quarter inch steel grinding balls - cannon balls - occupy 8% of the mill volume and are consumed in the grinding action at the rate of 600,000 pounds per month

Get PriceSAG mill liner development draws primarily on practical experience from SAG milling operations supported by computer-based modeling of charge motion in SAG mills and on established good design practice Liner design needs to respond to the process aspects of mill liner action that are critical to good SAG mill performance, ie.

Get PriceDownload scientific diagram | SAG Mill Response to Changes in Feed Size as Stockpile is Drawn Down from publication: Influence of feed size on AG / SAG mill performance | Feeding | ResearchGate .

Get PriceSAG mill, 40 ft, 42 ft, gearless mill drive, GMD, SAG manufacture, reliability THE PROJECT The Conga Project is located in Peru adjacent to Newmont’s existing Yanacocha operations The Conga Project has been in various development stages for approximately the last 15 years In ,

Get PriceThe power draw to mill load relationship is affected by changes in the milling density as a result of changes in viscosity and charge fluidity Furthermore, slurry transfer through and out of the mill affects the size of the slurry 5 pool within the mill and the size of the slurry pool affects power draw , The SAG mill was installed with a .

Get PriceThe purpose of the primary crusher is to reduce the ROM ore to a size amenable for feeding the secondary crusher or the SAG mill grinding circuit The ratio of reduction through a primary crusher can be up to about 8:1 Feed: ROM up to 15 m; Product: -300mm (for transport) to -200mm (for SAG mill) Feed Rate: 160 to 13,000 tph

Get PriceYou must manually check the motor's tent diagram to confirm that the predicted power draw is actually within the motor's capability at the indicated speed Liner and grate design The design of mill liners and SAG mill discharge grates will have a large effect on how efficiently the mill operates and the circuit throughput

Get PriceGearless mill drive (GMD) technology has further expanded the use of large AG milling allowing Outotec to produce the world's largest SAG mill of 42’ in diameter drawing power at 28 MW Today, Outotec is the world leading supplier of gearless AG mills operating globally

Get PriceBrainWave SAG mill is a unique control package using patented model-based predictive adaptive control technology It is well known within the mining industry that effective grinding in a SAG mill depends largely on the loading of the mill A mill con - taining too much material does not allow for adequate movement of the ore and balls within .

Get PriceMay 24, 1990· In semi-autogenous grinding (SAG), the grinding mill inventory, (ie 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) A two-dimensional graphical method is presented for determining the actual ball charge within ,

Get PriceSAG mill energy required according to this statement, is 25 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 25 speciﬁ c gravity (SG) range, will require more energy to grind to the same transfer

Get Price(Morrell, S Power draw of wet tumbling mills and its relationship to charge dynamics - Part 2: An empirical approach to modeling of mill power draw Trans Instn Mining Metall (Sect C:Mineral Processing Extr Metall) 105, January-April 1996 ppC54-C62 Austin LG A mill power equation for SAG mills Minerals and Metallurgical Processing Feb .

Get PriceJun 06, 2016· As mill sizes increases, the required volumetric capacity of the pulp lifters grows proportionally to mill volume Since AG/SAG mill volume is roughly proportional to the mill radius cubed (at typical mill lengths) while the available cross-sectional area grows only as the radius squared, pulp lifters must become more efficient at transferring .

Get PriceMay 22, 2017· SAG mill A semi-autogenous grinding mill, or Sag mill, is responsible for grinding materials from large chunks into small, usable pieces for processing The Sag mill is usually part of the primary stage in the grinding process Pieces of raw or fairly reduced materials are ground into smaller pieces for further processing or sorting

Get PriceThe SAG mill agreement has come about as First Majestic ordered a complete new SAG mill package, which, Condor says, is now superfluous to its requirements The SAG mill has a mill diameter of 24 ft (73 m) and an effective grinding length of 185 ft and a structural charge mass of 315 t, Condor Gold sa

Get PriceSAG/ball mill circuit incorporating pebble crushers and a POLYCOM® high-pressure grinding roll SAG and ball mill for gold ore grinding One of three SAG mills with 975 m diameter and 2 x 4000 kW drive power These mills operate in conjunction with ball mills for ,

Get PricePower at the mill shell The mill power draw models used in SAGMILLINGCOM all reference power as drawn at the mill shell Most surveys report power values as they are measured in the plant distributed control system (DCS), which is usually relative to the motor input power

Get Pricethe mill has been ground out to confirm the actual filling SAG mill load versus power draw curves are presented in Figure 3 SAG Mill Speed The design operating speed of the SAG mill was 74% of critical speed (902rpm) Operating at this speed during commissioning led to ball breakage due to overthrow of the charge, resulting in direct ball-to .

Get PriceSAG Mill power draw models are used in mill design and grinding circuit modelling to predict how muc h pow er wi, [↓ read more ↓] Alex Doll: modelling: A simple estimation method of materials handling specific energy consumption ,

Get Priceany item on the list to start drawing the circuit There are six unit process that the user can add to their circuit They are as follows: 1 Feed 2 Ball Mill 3 Semi-Autogenous Mill (SAG Mill) 4 Hydrocyclone 5 Sump Pump 6 Screen Apart from these six unit processes, there are some added features that makes the simulator easy to use

Get Priceconvert the Katinniq Concentrator Mill to SAG had in fact commenced as early as 1999, but were halted owing to alternative process improvements which achieved up to 1Mtpa as early as 2000 Up until this time, , - Mill motor current draw and winding temperatur

Get PriceJun 17, 2021· Due to its strong lifting capacity and excellent grinding performance, the trapezoidal liner is widely used in the SAG mill The structure of the trapezoidal liner is shown in Fig 1, the main dimensions are: dip angle \(\tau\), length of the top edge \(L\) and height \(h\)Dip angle \(\tau\) determines the trajectory of the mediums in the SAG mill, which directly affects ,

Get PriceThe SAG mill has a trommel on the discharge end of it Oversize is returned to the mill by a bucket wheel and water jet Trommel undersize was pumped to a vibrating screen where the , This next picture is a scale drawing of one of the trommels The slurry discharges out of the mill from the grates in the slot between the grates and the head .

Get PriceSAG Mill Discharge Controlling the feed and discharge of a mill is mostly a stabilisation exercise – you need to be able to quickly and accurately control the mill feed rate If the mill feed setpoint is changed, then the actual feed rate needs to stabilise at the new target in a short period of time The feed rate setpoint can then be tied .

Get PriceGearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing Outotec to produce the world's largest SAG mill of 42’ in diameter drawing power at 28 MW Today, Outotec is the world leading supplier of gearless SAG mills operating globally Parts and services for SAG mills Contact experts

Get Pricepower 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 smctesting 4 Figure 1 – Measured vs Predicted Motor Input Power 0 2000 4000 6000 8000 10000 12000 14000

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