### SAGDesign Test Starkey and Associates Inc.

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 motor power in industrial applications.

Chat Online### AG millsMetso Outotec

Gearless 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.

Chat Online### SAG Mill Grinding Circuit Design

Jun 06 2016 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.

Chat Online### Talk Mill grinding Wikipedia

If someone could expand on the SAG mill section of this article it would be great Wipware 17 59 14 May 2009 UTC ball mill discription What is this reference in the discription of a ball mill that says drawing approximately 0.0011 of the total world s power see List

Chat Online### SINGLE STAGE SAG/AG MILLING DESIGN

SAG mill 4 ball charge 90 Nc A cross between AG and SAG for average competency abrasive ores Typically operated in RSA on Witwatersrand Gold Ore Driefontein Underground Kloof Jacobina 6 SAG mill with recycle crusher 815 ball charge Competent ores better suited to coarse grind sizes High aspect mills are recommended to

Chat Online### SAG mill ArchivesInternational Mining

The 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 7.3 m and an effective grinding length of 18.5 ft and a structural charge mass of 315 t

Chat Online### SAGMILLING

Model types mill power draw Austin SAG model hybrid phenomenological and empirical model Morrell C model for SAG ball mills phenomenological model with empirical fitting Sub divided into a simplified model with typical defaults and a full model with all parameters editable.

Chat Online### A comparison of SAG mill power models

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.

Chat Online### PDF SINGLE STAGE SAG/AG MILLING DESIGN SINGLE STAGE SAG

The 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

Chat Online### Application of Operating Work Indices in Autogenous

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

Chat Online### A comparison of SAG mill power modelsCEEC Coalition

SAG mill power draw models are used in mill design and grinding circuit modeling 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.

Chat Online### The engineering and process effects of choosing a motor

The SAG mill power draw model of Austin using the cali bration by Doll 2013 is used to predict the process power draw at the mill shell Pshell and the efficiency losses for the drive s mechanical components based on Doll 2012 are used to determine the motor output power P The effect of varying the mill speed as a fraction of the critical

Chat Online### SAG MILL DISCHARGE SCREENS TROMMEL vs VIBRATING

The 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

Chat Online### ONLINE SAG MILL PULSE MEASUREMENT AND OPTIMIZATION

Jun 24 2006 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 8.98 kWh/ton to 4.74 kWh/ton A 11 decrease in SAG mill speed was

Chat Online### Kinross provides update on Tasiast mill fireKinross

Kinross is drawing on resources from across the Company to expedite actions to reduce the SAG mill s downtime and to review all potential strategies to mitigate the expected production deferral With mining activities continuing at Tasiast Kinross expects to process stockpiles of higher grade ore when the mill

Chat Online### Mill grinding Wikipedia

SAG mill SAG is an acronym for semi autogenous grinding SAG mills are autogenous mills that also use grinding balls like a ball mill A SAG mill is usually a primary or first stage grinder SAG mills use a ball charge of 8 to 21 The largest SAG mill is 42 12.8m in diameter powered by a

Chat Online### Mill power draw modelsSAGMILLING

You 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

Chat Online### Optimizing your SAG mill operationInternational Mining

Mar 21 2007 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.

Chat Online### Taking Control of the Mill Feed R2Orway Mineral

performance This necessitated increasing the power available to the SAG mill and reconfiguring the ball mill to a grate discharge unit to draw full motor power Manipulation of the proportion of secondary crushed feed allowed balancing of the duty between the SAG and ball mill.

Chat Online### SAG Ball Mill Rubber Lining SupplierEB Castworld

Size According to customer drawings Introduction The SAG Ball Mill Rubber Lining series mainly consist of shell lifter bars shell plates feed end plates discharge end grate plates discharger and so on A complete set of ball mill rubber liner consists of end liner grid type is lattice liner ends lifter bar the center ring grid type

Chat Online### SAGMILLING Articles

SAG 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 in HPGR circuits

Chat Online### A Method of C alculating Autogenous Semi Autogenous

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 gravity SG range

Chat Online### Optimization of a SAG Mill Energy System Integrating Rock

Jul 01 2019 The SAG mill will draw from one of the two stockpiles at will to minimize the energy cost If one of the stocks is emptied the ore from the other stockpile is used Stockpiles are modeled using a first in first out approach In our application a simplified heuristic is used to feed hard rock during the day and soft rock during the night.

Chat Online### SAG Mill Liner Plate in AS2074 L2AEB Castworld SAG

Special Features for SAG Mill Liner Plate in AS2074 L2A The material of SAG mill liners are low C or high C Cr Mo Alloy steel which depends on the specific working condition of the SAG mill The hardness of AS2074 L2B is HB310 HB380 We can make big size SAG mill liner castings with Sodium Silicate Sand Process Resin Sand Process.

Chat Online### SAG mill 3D CAD Model Library GrabCAD

May 22 2017 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 These machines are typically electrically powered but have been modified from

Chat Online### Kinross provides update on Tasiast mill fireMarketWatch

Jun 21 2021 Kinross is drawing on resources from across the Company to expedite actions to reduce the SAG mill s downtime and to review all potential strategies to mitigate the

Chat Online### MIRL Mill Simulator

any 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.

Chat Online### OSTI.GOV Technical Report Improving Energy Efficiency Via

Jul 21 2006 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 Hence typical gold or copper ore requires between 2.0 and 7.5 kWh per ton of energy to reduce the particle size Considering a typical mining operation processes 10 000 to 100 000

Chat Online### Grinding Circuitan overview ScienceDirect Topics

The SAG mill was designed to treat 2 065 t h −1 of ore at a ball charge of 8 volume total filling of 25 volume and an operating mill speed of 74 of critical The mill is fitted with 80 mm grates with total grate open area of 7.66 m 2 Hart et al 2001 .

Chat Online### Evolution of SAG Mill Process Control at the Xstrata

convert 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 temperatures.

Chat Online### SAGMILLING Articles

SAG 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 in HPGR circuits

Chat Online### Throughput optimisation in milling circuits

SAG Mill Discharge Controlling the feed and discharge of a mill is mostly a stabilisation exerciseyou 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

Chat Online### PDF SAG mill circuit optimisation at Ernest Henry Mining

The SAG mill power draw is dependent on the charge specific gravity and the total charge vo lume The target charge volume ranges from 25

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