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sag mill power draw

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A Method of C alculating Autogenous/ Semi-Autogenous ,

of the energy required by a SAG mill Put another way, the SAG 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 ,..

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The Evolution of Grinding Mill Power Models | SpringerLink

Jan 30, 2019· Mill power models have been used in a variety of ways in industrial practice since power directly equates to throughput and fineness of ground product We first start with Hogg-Fuerstenau Power Model and show how this model successfully predicted the power draw of many grinding mills in several mining operations..

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Advanced Simulation for Semi-Autogenous Mill Systems: A ,

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 21 SAG mill model The particles fed to the mill are ground in the milling chamber and subsequently..

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APPLICATION OF THE MINNOVEX SAG POWER INDEX AT ,

APPLICATION OF THE MINNOVEX SAG POWER INDEX AT FIVE CANADIAN SAG PLANTS , (1300 to 6780 kW), power draw per tph (36 to 26 kWh/t), and SAG product size (P80 from 124 to 2570 µm) At all five SAG plants, belt samples were taken during periods in which , laboratory grind time as a function of plant SAG mill power consumption..

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7uccl

Component of the Total Mill Power Draw (Cell J14) contributed by the Ball Charge Component of the Total Mill Power Draw (Cell J14) contributed by the Rocks , The Mill Power_SAG Mills spreadsheet was designed to estimate the Net and Gross Power Demand (kW) of a semiautogenous mill, as a function of its known dimensions and basic operating ...

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Model Predictive Control for SAG Milling in Minerals ,

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..

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Improving Energy Efficiency Via Optimized Charge Motion ,

The slurry transport within the ball mill greatly influences the mill holdup, residence time, breakage rate, and hence the power draw and the particle size distribution of the mill product However, residence-time distribution and holdup in industrial mills could not be predicted a priori..

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Solved: 2 A SAG Mill Operates With A 10,000 Hp Motor Typ ,

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..

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Bond Mill Power Equation - YouTube

Apr 03, 2018· The slurry level in AG/SAG and ball mills has an ,fred bond ball mill power draw equations - farwestgreatorg fred bond ball mill power draw equations_fred bond ball mill power draw ,..

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Module3 - AppE - SAG Mill Power Draw | Mill (Grinding ,

Jul 18, 2007· reference and relative power draw formulas presented here will provide you the best overall characterization of the power draw of your SAG mill 1-1: The Basic or Reference SAG Mill Power Draw Formula The following formula can be used to calculate SAG mill power draw as a function of mill operating conditions..

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7uccl

Component of the Total Mill Power Draw (Cell J14) contributed by the Ball Charge Component of the Total Mill Power Draw (Cell J14) contributed by the Rocks , The Mill Power_SAG Mills spreadsheet was designed to estimate the Net and Gross Power Demand (kW) of a semiautogenous mill, as a function of its known dimensions and basic operating ...

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AMIT 135: Lesson 6 Grinding Circuit – Mining Mill Operator ,

AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill , Larger than Ball mills at same power draw Special Tumbling Mill Special tumbling mills [image: (135-6-14)] , AMIT 135: Lesson 6 Grinding Circuit;..

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KnowledgeScape

Kinross – Round Mountain SAG Mill Adaptive Control In summary, by using the KnowledgeScape SAG mill adaptive control system (GrindingExpert™), we were able to increase production, increase power draw through increasing the grinding efficiency of the mill These benefits easily justify the low cost of the system and system maintenance..

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Over 80 comminution and minerals processing publications ,

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..

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Choosing a SAG Mill to Achieve Design Performance

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..

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Orway Mineral Consultants Canada Ltd Mississauga, ON ,

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..

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Energy Consumption in Mining Comminution - ScienceDirect

Comminution alone can account for 60% of mine electrical power load and more than 35% of the operation’s greenhouse gas emissions [23] 61 Case 1 In this example, a company operates 26 mines with 19 of the 26 using SAG (semi-autogenous grinding) and Ball mills, with power capabilities of up to 12,000 kW [24]..

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Optimization of mill performance by using - SciELO

Mill power Usually, plant operators use mill power readings as an indicator of ball filling degree and, often, try to keep it at the maximum level It is well known that the mill absorbed power depends on operating parameters other than ball level, such as pulp density and liner configuration Figure 2 shows that there is no linear relation between..

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Grinding mills: how to accurately predict their power draw

Grinding mills: how to accurately predict their power draw , In total 76 data sets were generated covering the power draws of ball, SAG and AG mills in the range 7 - 7900 kW ...

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O I SKARIN N O TIKHONOV CALCULATION OF THE ,

circuit power requirements for autogenous and semiautogenous milling The method is widely used by RIVS in extended calcula-tions at early design stag The article is composed of sections successively informing on the existing techniques of sizing SAG mill power, Bond work in-dexes and their applicability to calculating autogenous/semiau-..

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ONLINE SAG MILL PULSE MEASUREMENT AND , - ostigov

The US mining industry operates approximately 80 semi-autogenesis grinding mills (SAG) throughout the United Stat Depending on the mill size the SAG mills draws between 2 MW and 17 MW The product from the SAG mill is further reduced in size using pebble crushers and ball mills..

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O I SKARIN N O TIKHONOV CALCULATION OF THE ,

circuit power requirements for autogenous and semiautogenous milling The method is widely used by RIVS in extended calcula-tions at early design stag The article is composed of sections successively informing on the existing techniques of sizing SAG mill power, Bond work in-dexes and their applicability to calculating autogenous/semiau-..

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AMIT 135: Lesson 7 Ball Mills & Circuits – Mining Mill ,

Mill Power Draw The motor power draw required to turn a mill from rest to the operating speed includes the energy required for the initial starting torque and mechanical arrangements to rotate the mill It is generally accepted that practical mill power (PM ) is a function of mill capacity and diameter, ie,P M = Mill Constant * (Mill ...

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Application of Operating Work Indices in Autogenous ,

work indices for the AG/SAG mill and ball mill can be re-organised as [7] and [8], where B’Wio and A’Wio are the corrected operating work indices and 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)...

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Optimizing Performance of SABC Comminution Circuit of ,

operating at 90% of its maximum power 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..

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The Evolution of Grinding Mill Power Models | SpringerLink

Jan 30, 2019· Mill power models have been used in a variety of ways in industrial practice since power directly equates to throughput and fineness of ground product We first start with Hogg-Fuerstenau Power Model and show how this model successfully predicted the power draw of many grinding mills in several mining operations..

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Mill (grinding) - Wikipedia

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 ...

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Alex Doll - Principal Consultant - Alex G Doll Consulting ,

Oct 24, 2018· 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..

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Bond Mill Power Equation - YouTube

Apr 04, 2018· The slurry level in AG/SAG and ball mills has an ,fred bond ball mill power draw equations - farwestgreatorg fred bond ball mill power draw equations_fred bond ball mill power draw equations ...

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INCREASING SAG MILL CAPACITY AT THE COPPER ,

INCREASING SAG MILL CAPACITY AT THE COPPER MOUNTAIN MINE THROUGH THE ADDITION OF A PRE-CRUSHING CIRCUIT , SAG Power Draw, kW Date SAG Power Draw - kW (Daily) , Figure 10 - Ball Mill power draw Plant throughput rates were not much improved into 2012, so it was decided to collect a larger number of..

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