sag and ag mill

The AG Mill or SAG grinds primary crusher product and prepares it for final grinding in a ball mill Its product is usually passed over a large vibrating screen to separate oversize ‘pebbles’ from correctsize particles The correctsize material is sent forward to a ball mill for final grinding

AGSAG is short for autogenous mill and semiautogenous mill it combines with two functions of crushing and grinding uses the ground material itself as the grinding media through the mutual impact and grinding action to gradually reduce the material size

Gearless mill drive GMD technology has further expanded the use of large AG milling allowing Metso to produce the worlds largest SAG mill of 42’ in diameter drawing power at 28 MW Today Metso is the world leading supplier of gearless AG mills operating globally

Jan 01 2016 · AGSAG Mill Power In designing crushing–grinding flow sheets correct estimations of mill power draw are important as it serves as one of the deciding factors for selecting an option between AGSAG mills In most cases the circuit with the least or optimal power consumption is

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 20This process takes place inside the large rotating drum of SAG mill which is filled with balls partially

AGSAG Mill Liner Material Selection Different crushed material different working conditions need different material liners to suit In order to meet the requirements for customer AG or SAG mill liners the materials of large mill liners are mainly high manganese steel high alloy white cast iron high carbon chromiummolybdenum steel medium carbon chromiummolybdenum steel etc

SAG mill AG mill milling HPGR work index pilot plant INTRODUCTION The resistance of ore samples to breakage or hardness is measured through grindability testing Several grindability tests have been developed over the years for different applications and each test has its own strengths and

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

AGSAG Mill Liners We have supplied rubber pulp lifters for SAG mills up to 40 ft in diameter We are pioneers in the design of both radial and curved pulp lifters also design and manufacture Rubber PolyStl grates and discharge systems

SAG SemiAutogenous Grinding Mill Liner and AG Autogenous Grinding Mill Liner from HG use CrMo materials AS2074 Standard SAG SemiAutogenous Grinding Mill Liner and AG Autogenous Grinding Mill Liner provides superior impact and wear resistance in all semiautogenous milling applications To choose the right material for the right application is our mission we are always working

SAGDesign testing provides SAG pinion energy grindability in kWht to within 5 from 152 to 17 mm and Bond Ball Mill Work Index on SAG ground ore from the SAG test on the same sample Starkey Associates uses the patented SAGDesign technology to calculate accurate mill sizes from measurements on a client’s own ore samples

The SAG mill AG mill has both crushing and grinding two functions The grinding mode can be divided into dry type and wet type also known as aerofall type SAG mill and dump type SAG mill The SAG mill AG mill needs less auxiliary equipment is easy to realize production automation and the product granularity is relatively stable

AGSAG 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 AGSAG milling can often be accomplished Grinding Circuit Design AGSAG milling can be accomplished with a variety of flowsheets

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 8 – 15 ball charge Competent ores better suited to coarse grind sizes High aspect mills are recommended to

AGSAG mill surfaces are covered with steel or rubber liners which have two essential functions The first is to protect the structural outer shell from the aggressive environment inside the mill The aggressive environment required for size

AGSAG mill based circuits and this has impacted on the ability of companies to obtain funding Bailey et al 2009 published guidelines on the use of typical SAG millbased circuit design methods with particular focus on the use and misuse of JKSimMet A follow up paper by Lane et al in

Outotec SAG and ball mill Outotec highperformance grinding mills use advanced simulation tools for the best possible process efficiency mechanical reliability and maintainability SAG and AG mills typically have grate discharge arrangements which can be either with or without trommel screens SAG and AG

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

SAG mill is an investment that can produce handsome returns if extra production is needed or simply to give the mine the option to mill the hardest ores at design throughput rates Typical tests required to define a hardness variability function are given below in Figure 1

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

SAGDesign testing provides SAG pinion energy grindability in kWht to within 5 from 152 to 17 mm and Bond Ball Mill Work Index on SAG ground ore from the SAG test on the same sample Starkey Associates uses the patented SAGDesign technology to calculate accurate mill sizes from measurements on a client’s own ore samples

Inventory ID 6CHM03 UNUSED FLSMIDTH 36’ x 24 Dual Pinion SAG Mill with 2 ABB 9000 kW 12069 HP Motors for Total Power of 18000 kW 24138 HP

Karageorgos J Genovese P Baas D 2006 Current trends in SAG and AG Mill Operability and Control SAG 2006 Ketcham V J O’Reilly J F and Vardill W D 1993 The Lihir Gold project Process plant design Minerals Engineering 68101037 NapierMunn TJ 2009

Our AGSAG mill liners are manufactured to the highest industry standard for Autogenous GrindingAG SemiAutogenous GrindingSAG Primary Secondary and regrind rod or ball mills MGS Casting mill lining system designed by our highly trained and dedicated team throughout the world has taken your entire comminution circuit into consideration

AGSAG and ball mill circuit data is also very poor Use of equation 2 shows a very different picture the results being illustrated in Figure 7 This shows that on average the “M” operating work indices of AGSAG and ball mill circuits are very similar and hence energy utilisation efficiencies are similar Also

AGSAG 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 AGSAG milling can often be accomplished Grinding Circuit Design AGSAG milling can be accomplished with a variety of flowsheets

AGSAG mills accomplish the same size reduction work as 2 or 3 stages of crushing and screening AddThis Sharing Buttons Share to Facebook Share to TwitterShare to LinkedInShare to More Features The feed size for these mills is limited to the maximum size that can be practically conveyed and introduced into the large mill feed chutes And the product of the large AGSAG grinding is either a

The thesis has provided improvements to the previous AGSAG mill discharge understanding in terms of discharge rates and grate classification in relation to mill load and operating parameters Page iii Declaration by Author This thesis is composed of my original work

AGSAG mill specific energ y from the total circuit specific e nergy The app roach has been validated using 100 full scale c ircuits the a ccuracy being a s shown in Figu re 9

CITIC HIC SAGAG mills range in size below 12m diameter They feature hydrostatic lubrication and can accommodate either a geared or gearless drive arrangement and are typically grate discharge and use metal liners Semiautogenous SAG Mills Description of autogenous mill AG mill

Ball mill critical speed mineral processing metallurgyA ball mill critical speed actually ball rod ag or sag is the speed at which the centrifugal forces equal gravitational forces at the mill shells inside surface and no balls will fall from its position onto the shell the imagery below helps explain what goes on inside a mill as speed varies use our online formula the mill speed is

Rubber Metal Composite Liners for AGSAG Mills Polycorp has a long successful heritage in the mining industry and is recognized as one of the leading mill liner manufacturers in the world Polycorp has installed liners in mills up to 32ft98m and has supplied Mill Liners for more than 300 mills worldwide

Similar to the impeller design affecting pump capacity the pulp lifter design affects the discharge capacity or mill throughput of AG and SAG grinding mills Generally the discharge from AGSAG mills consists of one or both of the following components slurry water and finer particles and pebbles 20100 mm

AGSAG inef ciency varies according to the transfer size fi T80 whereby the ner sizes have less ineffi ciency than the fi coarser sizes This means a closed circuit single stage AG SAG mill can operate at a reasonable ef ciency if the fi nal fi product is in the 75 μm range Burgess 1991 stated that the AGSAG ineffi ciency factors

For example the SAG mill may have 10 MW of power draw available and the two ball mills each of 75 MW of power draw available for a total of ratio of 1015 115 The software uses the particular power model BondBarratt Morrell Mi etc to determine what is the transfer size where the ratio of E SAG to E ball matches the ratio of mill

SAGAG SCU SAGAG Sentinel Camera Unit SCU Concept of System The SCU uses the latest technology in highdefinition imagery within a custom designed housing permanently affixed to the feed chute to provide a live audio and temperature feed in a running SAG mill and video feed from inside a stationary SAG mill

SAG mill is an investment that can produce handsome returns if extra production is needed or simply to give the mine the option to mill the hardest ores at design throughput rates Typical tests required to define a hardness variability function are given below in Figure 1

Page 1 CURRENT TRENDS IN SAG AND AG MILL OPERABILITY AND CONTROL By John Karageorgos1 Paul Genovese2 and Dirk Baas3 1Principal Process Control Engineer Manta Controls Pty Ltd South Australia

approach the total specific energy of the entire AGSAG circuit is firstly predicted using the SAG mill feed F80 and the ball mill cyclone overflow P80 Morrell’s model Morrell 2011 relates the feed mill geometry and operating conditions to the specific energy of the circuit However the F80 is not enough to represent properly