### Outotec Grinding MillsOutotec

Outotec has extensive knowledge of comminution technologies and processes to ensure we provide the optimal solution for your needs. We offer autogenous (AG) semi-autogenous (SAG) ball rod and pebble mills in sizes ranging from kWs up to 30 MW.

### Autogenous and Semi-Autogenous MillsScienceDirect

Some dry autogenous mills operating in Canada are 8.5 m in diameter and 1.5 m in length. These are known as Aerofall mills. The Cadia Hill (Australia) wet SAG mill is 12.2 m in diameter with a 20 MW motor and in 2004 was the largest diameter mill in operation in the world.

### Autogenous and Semi-Autogenous Mills FL

Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28 000 kW.

### AMIT 135 Lesson 6 Grinding CircuitMining 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. Because of the range of mill sizes available AG/SAG milling can often be accomplished with fewer lines than in a conventional rod mill/ball mill

### AN OVERVIEW OF SINGLE STAGE AUTOGENOUS AND

5 Low ball charge SAG mill high mill speed. (4 ball charge 90 Nc) A cross between AG and SAG for competent abrasive ores. As typically operated in RSA. 6 SAG mill (configurations 3 and 5 ) with recycle crusher Competent ores better suited to coarse grind sizes as circulating loads can be high 7 SAG mills treating partially or fully

### Phoenix Big mill and latest tech keep long-lived mine

Jun 06 2019 · The semi-autogenous grinding (SAG) mill at the Phoenix Mine is the largest SAG mill in the United States. "This is a low-grade deposit so volume is

### SAG mills (semi-autogenous grinding mills)

SAG milling extends itself to many applications due to the range of mill sizes available. They 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 done by a ball mill. SAG mills are also an optimum solution for wet grinding since crushing and screening in these

### Design SAG mill production when you need it most In day 1

Transfer Size T80 Is the 80 passing size of ore as it passes from the SAG mill to the ball mill. It is typically about 1/3 the size of the screen opening but can be coarser than 1/3 especially when a pebble crusher is used. Screening at 5 mm ensures that the T80 will be about 10

### Gearless Mill DrivesABB Group

Antamina Compania Minera Antamina S.A. Peru Project One SAG Mill and 3 Ball Mill Drive Systems Capacity SAG Mill 1000 t/h Ball Mills 1000 t/h Consultant Bechtel USA Mill Builder FFE Minerals USA Mill Size SAG Mill 38 feet/11 58 m Ball Mills 24 feet/7 32 m Ore processed Copper/Zinc Drive Rating SAG Mill 20 1 MW 9 23 rpm Ball Mills 11 2 MW 11 38 rpm

### Ball millWikipedia

A ball mill is a type of grinder used to grind blend and sometimes for mixing of materials for use in mineral dressing processes paints pyrotechnics ceramics and selective laser sintering works on the principle of impact and attrition size reduction is done by impact as the balls drop from near the top of the shell. A ball mill consists of a hollow cylindrical shell rotati

### AMIT 135 Lesson 8 Rod MillsMining Mill Operator Training

Under given load and particle size requirement capacity is a function of mill length and diameter Q = kLD 2 N. N is related to mill diameter which decreases with larger diameters k a constant equal to π /4. A chart showing rod mill capacity vs. mill diameter image (135-8-5) A chart showing rod mill capacity vs. mill

### SAGMILLING . . Home

Sagmilling is home to a collection of both free and subscription-based calculation tools to aid metallurgical process engineers perform comminution calculations. Grinding circuit design tools including for SAG mill-ball mill circuits and geometallurgy energy models are available to subscribers.

### Choosing a SAG Mill to Achieve Design Performance

Choosing a SAG Mill To Achieve Design Performance John Starkey1 Principal Consulting Engineer Sami Hindstrom2 Manager Grinding Travis Orser2 Project Manager Grinding 1 Starkey Associates Grinding Design and Process Engineering 336268 Lakeshore Rd. E. Oakville Ontario L6J 7S4

### Design SAG mill production when you need it most In day 1

Transfer Size T80 Is the 80 passing size of ore as it passes from the SAG mill to the ball mill. It is typically about 1/3 the size of the screen opening but can be coarser than 1/3 especially when a pebble crusher is used. Screening at 5 mm ensures that the T80 will be about 10

### Mill (grinding)Wikipedia

Overview### Autogenous and Semi-Autogenous MillsScienceDirect

Some dry autogenous mills operating in Canada are 8.5 m in diameter and 1.5 m in length. These are known as Aerofall mills. The Cadia Hill (Australia) wet SAG mill is 12.2 m in diameter with a 20 MW motor and in 2004 was the largest diameter mill in operation in the world.

### AMIT 135 Lesson 6 Grinding CircuitMining 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. Because of the range of mill sizes available AG/SAG milling can often be accomplished with fewer lines than in a conventional rod mill/ball mill

### Minding the Grind Maintenance Options to Keep SAG Mills

The company said it has supplied trommel screens for almost four decades and has the capability to size SAG mill trommel screens with diameters up to 5.5 m. It designs the trommel screens to suit each customer s unique requirements with capacities ranging up to more than 3 500 tons per hour (t/h) solids.

### Bond Work Indexan overview ScienceDirect Topics

Ball mill design requires a Bond work index BWi for ball mills at the correct passing size SAG mill design requires an appropriate SAG test for example SPI (Chapter 5). Flotation design needs a valid measure of kinetics for each sample including the maximum attainable recovery and rate constants for each mineral ( Chapter 12 ).

### New Used Sag Mills for Sale Semi-Autogenous Grinding

24 x 8 Boliden Allis (Allis Chalmers) Sag Mill for Sale Boliden Allis (Allis Chalmers) SAG semi-autogenous grinding mill. Size 24 ft. dia. x 8 ft. long (7.3m x 2.74m). Steel liners 3000 hp s ID 50186 Quote 17 Foot dia. X 5 foot Aerofall Sag mills. 17 Foot dia. X 5 foot Aerofall Sag mills

### The appropriateness of the transfer size in AG and SAG

The appropriateness of the transfer size in AG and SAG Mill Circuit Design Article (PDF Available) · January 2011 with 665 Reads How we measure reads

### (PDF) Influence of feed size on AG / SAG mill performance

Build-up in critical size It is well established from the earliest use of AG and SAG mills that the build-up of competent critical size material can drop throughput to half (Morrell and Valery

### SAGMILLING . . Home

Sagmilling is home to a collection of both free and subscription-based calculation tools to aid metallurgical process engineers perform comminution calculations. Grinding circuit design tools including for SAG mill-ball mill circuits and geometallurgy energy models are available to subscribers.

### AMIT 135 Lesson 8 Rod MillsMining Mill Operator Training

Under given load and particle size requirement capacity is a function of mill length and diameter Q = kLD 2 N. N is related to mill diameter which decreases with larger diameters k a constant equal to π /4. A chart showing rod mill capacity vs. mill diameter image (135-8-5) A chart showing rod mill capacity vs. mill length

### Modelling Transfer size limitsSAGMILLING

The software uses the particular power model (Bond/Barratt Morrell Mi etc.) to determine what is the transfer size where the ratio of E SAG to E ball matches the ratio of mill power (1 1.5 in this example). This is the maximum efficiency transfer size where the mills will both operate at

### Modelling SAG milling power and specific energy

the SAG mill critical speed Pc = SAG mill power consumption (kW) 600 100 = of the fresh feed in the size range 152 25 mm. M. Silva A. Casali/Minerals Engineering 70 (2015) 156–161 157 In fact the later can be modelled as a function of the others.

### Selection of Comminution Circuits for Improved Efficiency

primary mill may be operated in open circuit or closed by a classifier such as a screen or a hydrocyclone. Closing the primary mill may result in an improvement in operating efficiency for some operations or may facilitate a reduction in the primary mill product size. 1

### Used Sag Mills for sale. Hardinge equipment more Machinio

18′ X 30′ OUTOTEC SAG MILL. Manufacturer Outotec Size 5.5 m dia. X 9.15 m EGL 4500 kW WEG wound rotor motor1000 RPM 11 000 volt 3 phase 50 Hz 2 Piece welded steel shell Cast steel feed and discharge heads Alloy steel liners Hydrostatic multi pad trun

### PAI SAG Mill TrainingYouTube

Click to view1 20Jan 08 2016 · Ore that s crushed in a primary crusher is usually fed into a SAG mill where it is reduced in size so that it can be fed into a second stage of grinding in one or more ball mills.

Author Performance Associates International### Bond Work Indexan overview ScienceDirect Topics

Ball mill design requires a Bond work index BWi for ball mills at the correct passing size SAG mill design requires an appropriate SAG test for example SPI (Chapter 5). Flotation design needs a valid measure of kinetics for each sample including the maximum attainable recovery and rate constants for each mineral ( Chapter 12 ).

### Minding the Grind Maintenance Options to Keep SAG Mills

The company said it has supplied trommel screens for almost four decades and has the capability to size SAG mill trommel screens with diameters up to 5.5 m. It designs the trommel screens to suit each customer s unique requirements with capacities ranging up to more than 3 500 tons per hour (t/h) solids.

### Modelling Transfer size limitsSAGMILLING

The software uses the particular power model (Bond/Barratt Morrell Mi etc.) to determine what is the transfer size where the ratio of E SAG to E ball matches the ratio of mill power (1 1.5 in this example). This is the maximum efficiency transfer size where the mills will both operate at full power.

### Difference Between Sag Mill vs Ball Millmech4study

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.

### Grinding millsfor mining and minerals processingMetso

has experience of over 8 000 grinding mills globally including manufacturing and delivering the largest SAG/AG mills in the world. Our experts welcome the opportunity to assist you with circuit and circuit control design as well as start-up operation and optimization of your mill.

### Modelling Transfer size limitsSAGMILLING

The software uses the particular power model (Bond/Barratt Morrell Mi etc.) to determine what is the transfer size where the ratio of E SAG to E ball matches the ratio of mill power (1 1.5 in this example). This is the maximum efficiency transfer size where the mills will both operate at full power.

### A Method of C alculating Autogenous/ Semi-Autogenous

SAG mills mimic the same shortcoming. It follows that in order to obtain the speciﬁ c energy (SE) to achieve a certain transfer size based on the 80 per cent passing value an inefﬁ ciency factor must be applied to the SE of single stage ball mills rod mills or AG/SAG mills when calculating power according to the Bond Third Theory method.