Jun 24 2006 Depending on the mill size the SAG mills draws between 2 MW and 17 MW The product from the SAG mill is further reduced in size using pebble crushers and ball mills Hence typical gold or copper ore requires between 20 and 75 kWh per ton of energy to reduce the particle size...We serves many industries, including construction crushing: jaw crusher, sand making machine; Industrial milling: ultrafine grinding mill, Raymond mill; Ore beneficiation: ball mill, magnetic separator; Green building materials: rotary dryer, dust collector; Tails treatment: briquette machine.
Configuration:Lime kiln, coal mill, cooling machine, jaw crusher, vibrating feeder, etc.
DetailsLimestone is mainly composed of calcium carbonate (CaCO3), MO's Hardness 3 degrees. The limestone particles or powders can be used in building materials, road construction, metallurgy, chemical and other industries after crushing or grinding.
DetailsMain Equipment:Jaw crusher, impact crusher, hammer crusher, vibrating screen, classifier, ball mill, etc.
DetailsThe SAG mill agreement has come about as First Majestic ordered a complete new SAG mill package which Condor says is now superfluous to its requirements The SAG mill has a mill diameter of 24 ft 73 m and an effective grinding length of 185 ft and a structural charge mass of 315 t
Get PriceImage of a Classical 3stage ore crushing prior to rod mill image 13551 Diagram of Typical 12 stage ore crushing prior to AGSAG mill image 13552 Calculation of Reduction Ratio in Crushing
Get PriceWith a complete range of mill liner components from lifter bars and shell plates to centre cones and trunnion liners we use a range of engineering tools including MillTraj modelling software Inventor 3D and AutoCAD to develop customised mill and scrubber liners to your requirements
Get PriceMH Series Grinding Mills A standard range of SAG ball and rod mills with spherical Designed according to the requirements of the European Machinery Directive and fully compliant with the ISO 15442 ISO 20332 and ISO 1384912 Mill drives We offer both highspeed induction and lowspeed synchronous motors Highspeed motors require an
Get PriceJan 11 2021 A further explanation is required to explain the importance of designing the SAG mill chamber to draw required power at optimum operating conditions of 75 critical speed and less than 30 by volume load
Get Pricerequirements while operating under extreme environmental conditions Focus on the future 28 MW GMD for a 40 SAG mill 28 MW GMD for 42 SAG mill The GMD can run the mill with variable speed in both directions of rotation This means the
Get PriceJan 01 2015 The ball charge is a function of the bulk fraction of the SAG mill volume Jb occupied by balls the ore retained in the mill is the result of the volumetric filling which depends on the ore size distribution specially the 6 and the 6 1 on the rotational speed NNc and on the solid concentration by weight fraction inside
Get PriceRPM with a range of 50 10 Single or dual pinions driving the ring gear Mill or Kiln type inching system The amount of space available at the required mill speed in conjunction with open gear set ratio and main drive gear reducer ratio where applicable
Get PriceThe design of mill liners and SAG mill discharge grates will have a large effect on how efficiently the mill operates and the circuit throughput All models generally assume that a mill is fitted with efficient liners and that the grate design neither limits passage of pebbles and pulp nor permits recirculation of pulp back into the mill
Get PriceMar 01 2000 The largest ringmotor driven mill in the world is a 36ft diam 16000hp SAG mill that processes up to 2000 tons of ore per hour Located at Kennecott Utah Copper near Salt Lake this mill
Get PriceModern large SAG mills are major capitalcost items with price tags reaching well into the eightfigure dollar range They stand at the entry point to a variety of comminution circuit setups and when they stop for whatever reason the revenue losses per circuit mount quickly
Get PriceSAG mills see Figure 1 are presently one of the most widely used models based on data from a wide range of fullscale plants are helpful and can significantly I is the fraction of the cr itical speed of the mill D is the mill diameter m Q M is the volume flow rate through the grinding media zone m 3h
Get PriceGear sizes can range up to 14 meters 46 feet in diameter with face widths approaching 12 meters 50 inches tion of the mill Unfortunately to get what is required this information needs and is the mill speed rpm Mill diameter is the nominal inside
Get PriceThe torque required to turn the mill is given by Torque T Mcgdc T f 89 The effect of varying mill speed on the power drawn by the mill is shown graphically in Figure 84 LG A mill power equation for SAG mills Minerals and Metallurgical Processing Feb 1990 pp5762
Get PriceMill Speed Critical Speed Mill Speed No matter how large or small a mill ball mill ceramic lined mill pebble mill jar mill or laboratory jar rolling mill its rotational speed is important to proper and efficient mill operation
Get Pricepredicted the required SAG mill specific energy and were likely to not reach design throughput limitations in SAG mill speed due to severe breakage of mill liners at higher speeds 6 P a g e and highly competent ore with DWI values in the range of 82 99 kWhm3 equivalent to
Get PriceSAG mills are the main workhorses in the majority of comminution circuits globally They need to be fed and kept working round the clock But challenges can arise when capacity is not optimised causing unnecessary downtime and liner wear leading to the one sound operators do not want to hear the sound of the mills standing still
Get PriceConstant speed Low speed synchronous motors Synchronous motors are widely used in mill driving systems at a constant speed using an air clutch between the motor shaft and mill p
Get PriceMill application features Frozen charge protection Detects frozen charge in the mill minimizing equipment wear and liner replacements Coupling supervision Detects if a failure or slippage occurs in the couplings and stops the system in case preventing major damages Standstill detection Prevents the motors from restarting if the mill is still rocking or moving after a stop
Get PriceThe mill critical speed will be calculated based on the diameter above less twice this shell liner width Mill Actual RPM Enter the measured mill rotation in revolutions per minute Result 1 This mill would need to spin at RPM to be at 100 critical speed
Get Pricethe 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 CasaliMinerals Engineering 70 2015 156161 157 In fact the later can be modelled as a function of the others
Get PriceAccording to available literature the operating speeds of AG mills are much higher than conventional tumbling mills and are in the range of 8085 of the critical speed SAG mills of comparable size but containing say 10 ball charge in addition to the rocks normally operate between 70 and 75 of
Get PriceMW It has been the industry standard for SAG mills above 13 MW capacity However pinion systems to 8 MW per pinion and dual motor systems with quadruple pinions extend the range of gear driven mills to a theoretical limit of 32 MW The Ernest Henry SAG mill 11 MW is currently the largest twin pinion single drive mill installed in Australia
Get PriceAGSAG 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 with fewer lines than in a conventional rod millball mill
Get Priceat the kiln or mill shell at normal operating speed when the main drive is operating Full load running torque required at the kiln or mill shell at inching operating speed Typically this is set at 120 of main drive operating torque The desired output speed at the shell Usually this is targeted at 01 RPM with a range of 50 10
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