The original grinding mill supply has now been revised to be two SAG mills (Fig) of 40 ft (122 m) in diameter and four ball mills of 26 ft (79 m) in diameter This change is the consequence of a more detailed throughput modeling conducted as part of the Basic Engineering phase and will provide a reasonable design margin over the nominal ,

Chat OnlineAug 25, 2004· Hi List: We have an application in a SAG Mill where we have installed an electronic ear in order to listen the noise produced by the balls falling to the bottom of the mill Our idea is to convert the amplitude and frequency of noise to a 4-20mA signal (or something else) in order to,

Chat OnlineSAG feed 80% passing (F80) size is a product of , Batu Hijau general Crushing and Milling process facility is presented in Figure 1 Further , • 2 x 36’ x 19’ ABB Svedala Gearless Motor Drive 134MW SAG Mills • 4 x 20’ x 335’ Svedala 7,400 kW Ball Mills

Chat OnlineAug 17, 2018· Well, the answer essentially lies in the feed size and the required product size Semi-Autogenous Mills/ SAG Mills (primary grinding mill) — these mills use grinding balls with forces of ,

Chat Onlinefor SAG and FAG mills, and gives the results of recent investigations of the , A GENERAL MODEL FOR SAG AND FAG MILLING 107 because the residence time is determined by the rates of breakage of feed material to less than the grate size, so it is a complex function of the feed size distribution and specific rates of breakage ,

Chat OnlineRod Mills Rod mills (see Fig 17) follow the general dimensions of tube mills with diameters from 3 to 6 ft and lengths from two to three times their diameter They differ from ball mills in that steel rods 3 or 4 in shorter than the mill length inside the liners are used as grinding media

Chat OnlineEvery mining operation has a unique grinding process 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

Chat OnlineApr 01, 2001· The dry grinding plant has a daily capacity of 12,000 tons and an availability record of 90% It consists of a single Svedala 500-hp gyratory crusher, an 8-ft by 24-ft Simplicity vibrating screen, a 800-hp cone crusher, and two Krupp-Polysius double-rotator grinding mills Each one is 19-ft-diam by 29-ft-long and has a variable-speed ,

Chat OnlineAutogenous and Semiautogenous Mills Datasheet Agsag mills are often the optimum solution for wet grinding achieved in a slurry to percent solids agsag mills can accomplish the same size reduction work as two or stages of crushing and screening, a rod mill, and some or all of the work done by a ball mill all because of the range of mill sizes available, agsag milling extends

Chat OnlineWe offer autogenous (AG), semi-autogenous (SAG), ball, rod, and pebble mills in sizes ranging from kWs up to 30+ MW Our product range also includes a number of unique solutions, including the world’s largest acid-resistant grinding mills, which can operate with extremely corrosive slurry

Chat OnlineAG/SAG mills accomplish the same size reduction work as 2 or 3 stages of crushing and screening Featur The feed size for these mills is limited to the maximum size that can be practically conveyed and introduced into the large mill feed chut And the product of the large AG/SAG grinding is either a finished size ready of processing, or an ,

Chat OnlineJan 01, 2016· Some dry autogenous mills operating in Canada are 85 m in diameter and 15 m in length These are known as Aerofall mills The Cadia Hill (Australia) wet SAG mill is 122 m in diameter with a 20 MW motor and in 2004 was the largest diameter mill in operation in the world

Chat OnlineTECHNICAL FIELD The invention relates to a sand wheel seal (or slurry return system) for a grinding mill BACKGROUND Prior art design of grinding mill sand wheel seals, which include Sag, Ag, Ball and Rod mills, see the “sand wheel” as a fabricated bucket design which is mounted or combined with the feed trunion insert

Chat OnlineWhen ore becomes rounded in most AG/SAG mills, comminution rates may be reduced in proportion to the relative size and quantity of rounded edg Recycle crushers not only minimize critical size fractions but also place edges on rock to promote comminution in AG and SAG mills Mill design and PBM models must account for this condition

Chat OnlineAG/SAG mill is inefficient in grinding particles of a certain size, typically in the range of 25-55 mm, ie, pebbl Therefore, cone crushers are often used as pebble crushers and integrated into AG/SAG mill circuits to break the critical size particles that accumulate in the mill and to increase the performance of the primary grinding circuits

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Chat OnlineSingle 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 43m through 122m in diameter with powers as high as 28,000 kW

Chat OnlineChoosing 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 336 – 268 Lakeshore Rd E Oakville, Ontario L6J 7S4

Chat OnlineFuller-Traylor SAG/AG Mills range in size from 43m through 122m in diameter with powers as high as 28,000 kW Our team of product engineers continually improves SAG/AG Mill designs in order to provide the most robust, safe, and efficient grinding mills available

Chat OnlineOct 12, 2017· The SAG mills are generally used in pre-processing of any type of material in grinding process SAG mills are also known as first stage grinders These heavy output SAG mills are usually powered by electricity As requirements and needs in grinding field are enhanced Improved SAG mills came in trend, which gives highly rated production

Chat OnlineSAG 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' (128m) in diameter, powered by a 28 MW (38,000 HP) motor

Chat OnlineKnowing the size distribution of ore, thanks to a split engineering image analysis system, the mill optimizes feed size and grinding efficiency Each grinding line has an 11-m diameter by 514-m variable-speed Svedala SAG mill Slurry is discharged to a cyclone feed ,

Chat OnlineSvedala Krupp 11 MW drive 60" x 89" 104m x 51 m , the SAG mills were fitted and the fit to the data was very good , Comparison between maximum mill throughput and SAG mill feed size

Chat OnlineAG/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 circuit A diagram of types of AG/SAG ,

Chat OnlineSimilar 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 AG/SAG mills consists of one or both of the following components: slurry (water and finer particles) and pebbles (20-100 mm) Single stage AG/SAG mills ,

Chat OnlineVertimill® is a unique product offered exclusively by Grind efficiency, reduced media consumption, lower installation cost, minimal maintenance, and minimal liner wear make Vertimill® the lowest total cost of ownership in many applications, substantially improving the profitability of concentrators

Chat Online36 ft x 19 ft (111 m x 58 m) SAG mills and three 20 ft x 30 ft (61 Two 22 ft (67 m) diameter Svedala Ball Mills A simulation from small scale pilot plant testing and laboratory testing on mill applications for over 30 years, and recently on most large,

Chat Onlineof the work e ciency of large-scale SAG mills 2 The Current Wear of the Cylinder Liner Structure The data of this research comes from the SAG mill (853 m 396 m) used in the SABC grinding process of a concentrator in Anhui, China This SAG mill adopts two L-shaped high and low liners arranged back to back, as shown in Figure1 Figure 1

Chat OnlineImpact and attrition size-reduction methods include air classifying mills, pin mills, hammer mills and jet mills Shear, impact and compression methods are used in media or ball mills The five types of milling technologies discussed in this article cover more than 90 percent of size-reduction applications in major chemical, food ,

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