Grinding Millsan overview ScienceDirect Topics

The ball mills are operated at a ball charge volume of 30–32 and 78.5 critical speed The SAG mill trommel undersize is combined with the ball mills discharge and pumped to two parallel packs clusters of twelve 660 mm diameter cyclones The cyclone underflow from each line reports to a ball mill while the cyclone overflow is directed

Sag Mill Advantages

The ball mill accepts the SAG or AG mill product Ball mills give a controlled final grind and produce flotation feed of a uniform size Ball mills tumble iron or steel balls with the ore The balls are initially 5–10 cm diameter but gradually wear away as grinding of the ore proceeds.

ball mill and sag mill from chinbitvaudomazlic

Nov 26 2019 The biggest characteristic of the sag mill is that the crushing ratio is large The particle size of the materials to be ground is 300 400mm sometimes even larger and the minimum particle size of the materials to be discharged can reach 0.1 mm The calculation shows that the crushing ratio can reach 3000 4000 while the ball mill

A Method to Determine the Ball Filling in Miduk Copper

autogenous SAG Mill via an utilized method Miduk copper concentrator is located in Kerman Province Iran and its size reduction stage includes one gyratory crusher which feeds one SAG mill 9.75 dia m 3.88 length m following two parallel ball mills 5dia m 7lenght m After SAG mill a

ball mill foundations designtutajfilm

These mills typically grind ROM ore in a single stage A large example of such a mill was converted from a single stage milling application to a semi autogenous ball mill crushing circuit and the application is well described This refers to high aspect AG/SAG mills Ball Charge Motion inside a SAG Mill With a higher density mill

Charge Motion inside a SAG Mill911metallurgist

The mill is a scaled down replica of a commercial Koppers 6.1 m x 2.13 m 20 ft x 7 ft SAG mill see Fig 1 The original design was developed by Vanderbeek and Herbst and was constructed by the Scale Model Makers of Cleveland Tennessee It is built of plexiglas and therefore allows the observation of the action inside the mill The

PDF Maximising SAG mill throughput at Porgera gold

Summary of Mill Survey Results 80 survey 1 SAG 2 70 Survey 1 2 2 3 60 Blast # SAG 1 Muck Load vol 26.3 22.826.9 50 Ball Load vol 11.0 13.8 13.8 13.2 40 Ball Size mm 150 125 125 125 30 Power KW 4550 4650 3970 4310 20 Bearing Pressure 3900 3740 3720 3927 10 kpa 0 Mill Speed rpm 11.42 11.42 10.79 11.50

PARAMETER OPTIMIZATION OF LARGE SAG MILL LINER

The semi autogenous SAG mill grinds materials with steel balls as the grinding media and is the main grinding equipment in industrial production Liners are equipped in the internal of the SAG mills which have the function of protecting the barrel and adjusting the trajectory of the medium.

Ball mill/SAG mill drive lubrication system IEEE

Abstract This paper describes the function and operation of lubrication systems for Ball Mill and SAG Mill Drives Provided within this paper are hydraulic schematics functional description and a general overview of system layout as well as some of the important features and factors relevant to improving the reliability of this very critical part of the grinding mill drive system.

RoM BALL MILLSA COMPARISON WITH AG/SAG

Table 3 A summary of RoM ball and SAG mill test conditions Test AG T1 AG T2 RoM ball T3 RoM ball T4 Plant feed rate tph 675 683 712 799 F80 mm 44.8 42.9 18.9 47.8 Mill filling volumetric 47

Autogenous mills semi autogenous mills and ball mills

SAG and ball mill for gold ore grinding One of three SAG mills with 9.75 m diameter and 2 x 4000 kW drive power These mills operate in conjunction with ball mills for iron ore grinding in Iran Ball mill for grinding lime stone for a flue gas desulphuri sation system in a Korean

Φ6.0m x 3.0m SAG Mill and Φ7.3m x 4.27m Ball Mill Liners

They have a set of Φ6.0m x 3.0m SAG Mill a set of Φ7.3m x 4.27m Ball Mill and a set of Fx 500 hydrocyclone group After one year s operation the mill liners of the semi autogenous mill must be replaced after 4 months of service and the liner of the ball mill must be replaced after 7

Gearless Mill DrivesABB

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

SAG and Ball Mill LinerEB Castworld SAG and Ball Mill

SAG and Ball Mill Liner system serves two purposes Protect the mill shell from wear caused by the impact and abrasion of the mill charge and to elevate and tumble the mill contents in the necessary manner to create a grinding action To achieve this the mill liner profile must be constructed from high wear resistant materials and incorporate correct geometry to help determine the elevation

What s the difference of Ball mill SAG mill AG mill

The ball mill contains materials meant for crushing and grinding such as balls of ceramic small rocks or balls made from stainless steel The internal device of the ball mill grinds material into powder like substances and can rotate continuously for optimal grinding and refinery production.

A mill power equation for SAG mills SpringerLink

where m p is in kW D is internal mill diameter meters L is internal mill length meters J is total fractional charge loading of the mill J B is the fractional mill filling by balls ε B is the effective porosity of the charge taken as 0.3 ρ s and ρ b are true densities of rock and balls tons per cubic meter respectively w c is the weight fraction of rock in water and rock in

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Optimizing your SAG mill operationInternational Mining

The mill discharge from these mills consists of slurry which goes to the ball mills for further grinding and coarse pebbles/rocks which are crushed and sent back to the mill To maximize the capacity of these circuits the general practice is to use grates with pebble ports reaching 100 mm instead of normal grate openings to increase the

Sag Mill Liners on salesQuality Sag Mill Liners supplier

Sag Cement Mill Liners 1.8 tons Pulp Inner Lifter For SAG Mills Detailed Description Pearlitic Cr Mo Alloy Steel Casting Liners For dia.36 SAG mills with AS2074 L2B 1 Hardness difference from surface to

What s the Difference Between SAG Mill and Ball Mill

The working principle of the self grinding machine is basically the same as the ball mill the biggest difference is that the sag grinding machine uses the crushed material inside the cylinder as the grinding medium the material constantly impacts and grinding to gradually pulverize.

Sag Mill Vs Ball Milldroemer architekten

Difference Between Sag Mill vs Ball Mill mech4study Oct 12 2017 Today we will learn about difference between sag mill vs ball mill A mill is a machine by which solid or hard materials are broken into smaller pieces by means of grinding crushing or cutting This commutation is an essential part of many process Autogenous and Semi Autogenous Mills

ZiBo Maohua Industry Co Ltd.

ZiBo Maohua Industry Co Ltd ZIBO MAOHUA INDUSTRY CO LTD is a project engineering company that has contracted agreements with carefully selected ISO accredited foundries and machining works based in China We manage the manufacturing of whole set equipments and components used in the mining and metallurgy industry Specializing on the ball mill SAG mill AG mill

SAGMolycop

The Molycop range of SAG grinding balls is prepared for impact Through an innovative manufacturing process we ve produced a ball with greater impact resistance and reduced spalling compared to the standard SAG ball ready to perform in the highest impact SAG milling environments.

SAG Ball Mill Rubber Lining SupplierEB Castworld

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 is

Ball mill/SAG mill drive lubrication system IEEE

Abstract This paper describes the function and operation of lubrication systems for Ball Mill and SAG Mill Drives Provided within this paper are hydraulic schematics functional description and a general overview of system layout as well as some of the important features and factors relevant to improving the reliability of this very critical part of the grinding mill drive system.

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.

What s the Difference Between Ball Mill Rod Mill and SAG

Ball mill Ball mills are the most widely used one Rod mill The rod mill has the highest efficiency when the feed size is <30mm and the discharge size is about 3mm with uniform particle size and light overcrushing phenomenon SAG mill When the weight of the SAG mill is more than 75 the output is high and the energy consumption is low

Difference Between Sag Mill vs Ball Millmech4study

Ball mill is a fine grinder A horizontal or vertical rotating cylinder which is filled partially with the balls of ceramics small rocks and balls made from stainless steel The ball charge of a SAG mill is about 29 to 30 By friction and influence of tumbling balls inside rotating cylinder grinds the raw material to the required fineness.

SAG mill grinding ballCrushers Ball Mills Flotation

The sag mill grinding ball produced by ZJH minerals is high tech wear resistant products for different mines Our grinding balls are researched relies on the scientific research team composed of experts and scholars in the field of wear resistance sag mill grinding ball has the characteristics of high toughness high strength high wear resistance high corrosion resistance strong impact

Ball Mill Sag Mill PartsPRODUCTSShanghai Bogvik

Ball Mill Sag Mill Parts Mill Liner Roller Tire Raymond Roller Tire Willams Steel Ball Heavy Machinery Parts Bucket Tooth Sprocket Chocolate Bar Track Shoes Wear Plate Metal Shredder Parts Hammers Grates Breakers and Cutter Bars Anvils Side Liners Caps and Hammer Pins Pin Protectors Feeder Wear Parts Apron Feeder Pans

SAG millsMetso Outotec

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.

What is the difference between a SAG mill and ball 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 28 MW 38 000 HP motor.

AG Mill and SAG Millball mills supplier

The working principle of the SAG mill and AG mill is basically the same as the ball mill machine but the barrel diameter of the SAG mill and AG mill is larger The raw ore enters the AG mill through the feeding inlet and the material is brought to a high place under the rotation of the barrel and then falls.