### SAG Mill Operation at Cortez Evolution of Liner Design

123 PAPER 9 SAG Mill Operation at Cortez Evolution of Liner Design from Current to Future Operations Julius Stieger1 Process Superintendent Dave Plummer2 Process Maintenance Planner Sanjeeva Latchireddi3 Chief Process Engineer Raj K. Rajamani4 ProfessorMetallurgical Engineering 1BarrickCortez Gold Mines Star HC66 Box 1250

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It is the sound of rising costs by the hour both from the downtime itself and from maintenance costs. Optimising the capacity of your SAG mill is crucial to avoiding downtime and liner wear and damage. With variances in mill ore feed rate mill speed and slurry density critical impacts can occur in your SAG mill.

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size while maximizing throughput or when the circuit is SAG mill limited achieve the ﬁnest grind size possible thus increasing mineral liberation and recovery. GrindingExpert™ has been shown to typically increase throughput by 3-6 GrindingExpert™. More Tonnage. Better Grinding

Get Price### Benchmarking SAG Mill Power Draw ModelsSAGMILLING

Benchmarking SAG Mill Power DrawMeadowbank Muteb P. Allaire J. Meadowbank Mine Process Plant Throughput Increase Proceedings of the Canadian Mineral Processors Annual General Meeting Ottawa Canada January 2013.

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SAG Mill Power. SAG milling can be optimised to achieve maximum breakage and throughput (or any other number of objectives). The relationships between the key variables are highly non-linear and shift as the ore hardness steel load and liner conditions change.

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and is one of the reasons why SAG mills and some ball mills utilize variable-speed drives (VSDs). It is this "actuator" — i.e. varying mill speed — that is exploited by SmartMill™ to increase grinding efficiency reduce energy consumption increase throughput decrease particle size variation reduce overgrinding improve product

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Grinding mill process design. Choosing an appropriate grinding circuit configuration depends on your ore characteristics and mine plan. Outotec has extensive knowledge of comminution technologies and processes to ensure we provide the optimal solution for your needs.

Get Price### Implementation of a SAG grinding expert system at Barrick

IMPLEMENTATION OF A SAG GRINDING EXPERT SYSTEM AT BARRICK NORTH MARA 19 (SAG) mill. The primary objective was to maintain an on spec and stable grinding product to leaching while maximizing throughput. This was achieved by optimization of the mill power draw and load through the manipulation of appropriate variables. The SGS expert

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When people think of mineral processing and comminution they tend to focus on equipment like the SAG mill. To get optimal performance from your rock crusher ball mill and all oth A single-minded focus by any of these groups to maximize throughput may come at the expense of other units and ultimately at the expense of overall throughput.

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Leveraging unique expertise to maximize mill performance. SAG mill maintenance and relining is a field where finding and employing expertise pays dividends. With the step up in mill throughput and power there has been a corresponding increase in mill liner size.

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Blast fragmentation for maximizing the SAG mill throughput at. Blast fragmentation for maximizing the SAG mill throughput at Porgera GoldmineABSTRACT The Porgera joint venture and Dyno Noble have commissioned a joint . .da Usina do Sossego Optimization of the Sossego SAG mill . circuito.brSossego was the first Vale SAG mill operation to process

Get Price### Blast fragmentation for maximizing the SAG mill throughput

In favour of fines to benefit the SAG (Semi Autogenous grinding) mill throughput Grundstrom et al. (2001) state that the blast fragmentation affects mill throughput and finer ROM (Run of Mine

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Maximising SAG mill throughput at Porgera gold mine by optimising blast fragmentation

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control the weight in the SAG mill to promote optimum grinding. This strategy has been demonstrated to improve mill throughput by as much as 3 . When copper prices are high producers look to increase production by eliminating process bottlenecks. At Minera Los Pelambres as at many mines SAG mill throughput limits overall production.

Get Price### Leveraging unique expertise to maximize mill performance

Leveraging unique expertise to maximize mill performance. SAG mill maintenance and relining is a field where finding and employing expertise pays dividends. With the step up in mill throughput and power there has been a corresponding increase in mill liner size.

Get Price### (PDF) Maximising SAG mill throughput at Porgera gold mine

Maximising SAG mill throughput at Porgera gold mine by optimising blast fragmentation

Get Price### Throughput optimisation in milling circuits

SAG Mill Power. SAG milling can be optimised to achieve maximum breakage and throughput (or any other number of objectives). The relationships between the key variables are highly non-linear and shift as the ore hardness steel load and liner conditions change.

Get Price### GrindingExpert™WordPress

size while maximizing throughput or when the circuit is SAG mill limited achieve the ﬁnest grind size possible thus increasing mineral liberation and recovery. GrindingExpert™ has been shown to typically increase throughput by 3-6 GrindingExpert™. More Tonnage. Better Grinding

Get Price### Blast fragmentation for maximizing the SAG mill throughput

In favour of fines to benefit the SAG (Semi Autogenous grinding) mill throughput Grundstrom et al. (2001) state that the blast fragmentation affects mill throughput and finer ROM (Run of Mine

Get Price### ARE SAG MILLS LOSING MARKET CONFIDENCE

AG or SAG mills have been in use in comminution circuits since the 1950 s and are considered a mature technology in most countries. However a reasonable number of recent SAG mill based projects have under-performed and not achieved throughput targets under their design conditions. This has resulted

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1 IMPROVEMENTS IN SAG MILL THROUGHPUT FROM FINER FEED SIZE AT THE NEWMONT AHAFO OPERATION Adrian Dance1 Sonny Mwansa2 Walter Valery 2 George Amonoo3 and Bryon Bisiaux3 1SRK Consulting (Canada) Inc 22nd Floor 1066 West

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As an example Lam et al (2001) used to "mine to mill" concept to maximise the throughput of a SAG mill by adjusting the blast fragmentation. In general the approach entails changing powder

Get Price### Increase throughput and capacity in SAG mills

It is the sound of rising costs by the hour both from the downtime itself and from maintenance costs. Optimising the capacity of your SAG mill is crucial to avoiding downtime and liner wear and damage. With variances in mill ore feed rate mill speed and slurry density critical impacts can occur in your SAG mill.

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Optimization of mill performance by using online ball and pulp measurements Soon after a stop a mill is a dangerous place to enter for the personnel tasked with taking measurements or samples. Crash stops are difficult to handle. The mill and all feed streams should be stopped simultaneously but often they are stopped around about the same time.

Get Price### SAG Milling in Australia -Revised Submission

increasing throughput are assessed. Finally future developments are anticipated in mill design and control and competing processes are identified. INTRODUCTION This is the third review of SAG milling practice in Australia previous surveys were presented in 1991 (Siddall and White) and in 1997 (Siddall).

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Maximizing Throughput On Sag Mill we Ltd. is a large-sized joint-stock enterprise integrated with the scientific research production and sales of heavy mining machinery. It is located in high and new technology industrial development zone Zhengzhou with an area of 200 000 m².

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Grinding mill process design. Choosing an appropriate grinding circuit configuration depends on your ore characteristics and mine plan. Outotec has extensive knowledge of comminution technologies and processes to ensure we provide the optimal solution for your needs.

Get Price### AMIT 135 Lesson 7 Ball Mills CircuitsMining Mill

Ball Mill Design. A survey of Australian processing plants revealed a maximum ball mill diameter of 5.24 meters and length of 8.84 meters (Morrell 1996). Autogenous mills range up to 12 meters in diameter. The length-to-diameter ratios in the previous table are for normal applications. For primary grinding the ratio could vary between 1 1and

Get Price### Optimization of mill performance by using

Optimization of mill performance by using online ball and pulp measurements Soon after a stop a mill is a dangerous place to enter for the personnel tasked with taking measurements or samples. Crash stops are difficult to handle. The mill and all feed streams should be stopped simultaneously but often they are stopped around about the same time.

Get Price### Blast fragmentation for maximizing the SAG mill throughput

Blast fragmentation for maximizing the SAG mill throughput at Porgera Goldmine

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and ore quality to maintain mill weight and maximize production. As the weight controller adjusts the set point for fresh ore feed a second BrainWave controller adjusts Los Pelambres as at many mines SAG mill throughput was limiting overall production. Antofagasta s wanted to • Maintain the desired mill load ensuring optimal mill

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Oct 12 2017 · SAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilize the balls in making the large fragments of materials broken into pieces. The ball charge of a SAG mill is about 9 to 20 .This process takes place inside the large rotating drum of SAG mill which is filled with balls partially.

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• MAXIMIZE MILL THROUGHPUT Controlling the mill fill level rather than bearing pressure increases has been introduced to the minerals and mining industry for optimal SAG mill control using vibration and digital signal processing techniques in Australia through a joint

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of SAG mill performance through 1. Changes in liner/lifter design to maximize throughput while maintaining acceptable wear levels. 2. Changes in ball size to maximize particle breakage without producing exceptionally high impact forces. 3. Changes in grate and pan lifter designs to decrease internal mill recycle and increase throughput.

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Mill Operators Conference 2018 Paper Number 13 SAG Mill Optimisation and Increasing Throughput at the Phu Kham Copper-Gold OperationA Success Story Rajiv Chandramohan1 Robert Braun2 Greg Lane3 Kirsty Hollis4 Johnson Le5 Dirk Baas6 1. MAusIMM Principal Consultant Ausenco rajiv andramohan ausenco 2.

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Blast fragmentation for maximizing the SAG mill throughput at. Blast fragmentation for maximizing the SAG mill throughput at Porgera GoldmineABSTRACT The Porgera joint venture and Dyno Noble have commissioned a joint . .da Usina do Sossego Optimization of the Sossego SAG mill . circuito.brSossego was the first Vale SAG mill operation to process

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