Optimization of the Design of SAG Mill Internals Using High Fidelity Simulation by John A Herbst Svedala Optimization Services and Lawrence Nordell Conveyor Dynamics, Inc September, 2001 ABSTRACT High Fidelity Simulation of SAG milling is a technique, which uses DEM, CFD and FEM to

Get PriceMill speed can be adapted to upstream and downstream processes – avoids overgrinding, and optimizes load distribution between SAG and ball mill (Mular, Halbe & Barratt, 2002) Power consumption is influenced by load respectively torque and mill speed This means that further energy can be saved if a mill speed below the rate speed is re-

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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 Casali/Minerals Engineering 70 (2015) 156–161 157 In fact the later can be modelled as a function of the others

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Get PriceConveyor lift height, used to estimate the specific energy consumption of the conveyors, Formulae The method is superficially similar to Bond (among other models), but with a variable exponent on size defined by: Where x is the particle 80% passing size in µm

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Get PriceMilling - energy intensive and high maintenance, overcoming the challenges using frequency converters (English - pdf - Article) Ring-geared mills operated with frequency converter (much more than just variable speed) (English - pdf - Article) Use of the latest technology to overcome the demands of mill operation (English - pdf - Article)

Get PriceBall mill conveyor discharge chute sag mill conveyor discharge chute 43 ft long 84 wide sag mill feed the to 2bc keeping these conveyors running is a major factor in variable speed, weightometer, camera on sag feed , ball mill feed chute design, ball, at,

Get PriceIn this issue we will continue our series on feed mill design considerations The article will focus on ingredient receiving and suggestions for receiving system equipment Ingredients may be received in several ways, including bulk, bag, tote and liquids Non-liquid ingredients are unloaded through dump systems, bag and tote off-loading to a warehouse location, while liquids are received in ,

Get Pricemill grinding media is also added to the SAG mill feed conveyor via a rotary feeder and hopper arrangement The grinding circuit consists of a single semi-autogenous grinding (SAG) mill followed by a single ball mill operating in , a single 185 MW variable-speed cyclone feed ,

Get Priceto the SAG mill feed conveyor A 736 Allis Chalmers pebble crusher (110 kW) performed this duty A Process Flow Diagram is presented in Figure 2 The 853 m Ø x 392 m EGL (28 x 128-ft) SAG mill is fitted with two 1850 kW motors An operating ball charge in the range of 4 to 10% is used The mill currently operates at a fixed speed

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Get Pricevariable-speed driv Variable Speed Applications | 2 l High uptime , l Increases output and performance of SAG mill – improved process control and longer lifetime of equipment (more flexibility) , Conveyors ,

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Get Pricevariable speed apron feeders onto a SAG mill feed conveyor SAG mill grinding media is added to the ore feed conveyor via a spillage return hopper Primary grinding is achieved in a dual pinion 13 MW variable speed slip energy recovery/ hyper-synchronous drive 34 ft × 20 ft SAG mill ,

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Get PriceThe variable speed RMD solutions offer the ability to minimize the wear of mechanical components of the mill As an example, the impact of the balls on the liners of the mill can be avoided by reducing the rotation speed

Get PriceWhile many mills today are mounted on load cells, others employ bearing oil pressure as a proxy measurement of mill load A control strategy recently implemented on a large variable-speed SAG mill at MMG’s Century Zinc operation in Australia is shown in the chart (found on pg 32)

Get PriceVariable speed drives improve metering accuracy and can provide a wide range of feed rat Screw feeders are available in a variety of sizes, lengths, configurations and materials of construction The inlet of a screw feeder is always flood loaded (100-percent)

Get Price"vary P80" is for fixed-speed or variable-speed ball mills The extra secondary stage power is consumed by over-grinding the ore "vary speed" is only for variable-speed ball mills The ball mill speed is reduced so that the secondary power draw is exactly what is necessary to achieve the target circuit P 80 Secondary mill limited condition

Get PriceDec 09, 2019· In the second case, a processing plant uses two high-speed belt conveyors for two different servic The first one has a speed of 76 m/s, a 2,800-mm width and a length of about 4 km The power rating and capacity are 12 MW and 37,000 t/h, respectively This conveyor features a steel cable belt of 5,000 N/mm

Get Pricedriven by two constant torque variable speed Siemens electric motors , measurement of the ore size di stribution on conveyor , The new practice of applying full pre-crushing of SAG mill feed ,

Get PriceThe camera was installed 3 mts away from the commercial sizer over the feed conveyor of the SAG Mill [PDF] , Morrell and Morrison (1996) modelled the effect of ball charge, mill filling, feed size distribution and mill speed on each breakage rate The resulting 5 empirical equations are embedded in the current JKSimMet Variable Rates AG/SAG ,

Get PriceThe breakage rate function shape of the SAG mill is largely governed by the mill load particle size distribution and mill speed The feed in the mill contains fractions of ore that serves as the grinding media Larger ore fractions break the smaller particles but also breakdown themselves and exit the mill ,

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Get PriceThe feed end of the 13000 hp Fort Knox SAG mill The mill is driven by two GE horizontal synchronous variable speed motors, one of which is depicted on the bottom right

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