• AG/SAG Mill Circuit Grinding Energy Requirement

    AG/SAG 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 AG/SAG and ball mill circuits are very similar and hence energy utilisation efficiencies are similar Also the AG/SAG and ball mill

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  • How A Sag Mill Works

    How A Sag Mill Worksondawireless how does a sag mill work CMS Crusher Machine Sale In The how does ball mill works youtube 20 may 2013 how does a

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  • mode of operationof sag and ball mills

    how does a sag mill work where does the material discharge Ball millWikipedia The ball mill is a key piece of equipment for grinding crushed materials and it is widely used in production lines for powders such as cement silicates refractory material fertilizer glass ceramics etc as well as for ore dressing of both ferrous and non ferrous metals

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  • Design of the 40 foot SAG Mill Installed at the Cadia

    determined that the SAG mill and recycle crusher design would need to be flexible to cope with these fluctuations This necessitated including use of both a variable speed SAG mill drive and the ability to handle variations in the pebble crusher feed rate Monzonite Bond ball mill work indices Wi averaged 17 1kWh/t with a

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  • SAG mill wear optimization using DEM simulation

    2018 3 13 Video 1 Mill Showing Surface Wear Modification Case scenario Consider a large SAG mill with a diameter of 10 97 m as shown in Figure 1a The mill has a high definition line design with alternating lines of high and low elevators Figure 1b The mill processes rocks from 200 mm to 300 mm using 350 mm steel balls as the grinding medium

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  • How Does A Sag Mill Work

    a Sag Mill Introduction Vertical milling machine is to solve the industrial mill output low energy consumption and higher technical problems absorb European advanced technology combined with my years of state of the art mill design and manufacturing philosophy and market demand after years of painstaking design improved largegrinding equipment

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  • SAG Mill

    2005 6 1 I work at a copper mine that has a SAG mill with 5 balls When we go in the mill for liner inspections you can feel balls exploding underneath your feet Last year my boss got cut in the ear by one I always thought that the balls exploded due to the internal stress generated by the outside cooling and shrinking faster than the inside If

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  • What s the Difference Between SAG Mill and Ball Mill

    2019 11 26 SAG mills grinding media includes some large and hard rocks filled rate of 9 20 SAG mill grind ores through impact attrition abrasion forces In practice for a given ore and equal processing conditions the AG milling has a finer grind than SAG mills How does a sag mill work

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  • SAG Mill

    SAG Mill Grinding Solutions offers the following tests for SAG mill testing and/or sizing JKTech Drop Weight The JKTech Drop Weight Test measures the breakage characteristics of an ore for five size fractions in the range of 13 to 63 mm at various energy inputs 0 1 to 2 5 kWh/t

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  • Ball Mill

    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 The feed to ball mills dry basis is typically 75 vol

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  • PDF Real Time Simulation and Control of a SAG Mill

    data of an industrial SAG mill having a diameter of 36 f t and a length of 16 f t The main operational variables are ore feed rate 1500 1600 tph mineral density 3000 kg/m 3 pulp density

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  • SAG Mill Grinding Circuit Design

    2016 6 6 By combining with SAG discharge and screening on the SAG discharge screens top size control to the ball mill circuit feed is maintained while still unloading the SAG circuit Mosher et al 2006 A variant of this method is to direct pebble crushing circuit product to the ball mill sump for secondary milling while convenient this has the

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  • A comparison of SAG mill power models

    SAG Mill power draw models are used in mill design and grinding circuit modelling to predict published method works out to 0 17 an additional 507 kW for a total of 3 472 kW power draw at the mill shell The measured power is 3 190 kW at mill shell so the model predicts high by 298 kW

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  • how a sag mill in macedonia

    2021 10 22 SAG mills semiautogenous grinding mills 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 SAG mills are also an optimum solution for wet grinding since crushing and screening in these

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  • SAG mill Archives

    2021 10 30 The 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 7 3 m and an effective grinding length of 18 5 ft and a structural charge mass of 315 t Condor Gold said

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  • SAG Mill Success Start with the Basics

    2007 3 29 SAG Mill Success Start with the Basics SAG mills are often flexible enough to accomplish the same size reduction provided by two or three stages of crushing and screening a rod mill and some or all of the work of a ball mill With units available in

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  • Changing sag mill liners type from Hi Low to Hi Hi at

    2021 9 14 of the SAG mill is transferred onto a vibrating screen The oversize material is crushed in a pebble crusher and the undersize is combined with the ball mill 6 71 9 91 m discharge and sent to the cyclones The SAG mill in phase 1 uses two 4100 kW synchronous motors and works with a constant 10 5 rpm rotational speed in two

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  • How To Calculate Mill Charge Level

    SLURRY POOLING AND TRANSPORT ISSUES IN SAG MILLS In essence the slurry level should be just below the charge level after a crash stop A crash stop is conducted to measure mill filling and slurry level and the How Rod Mills Work The limits on charge level are 1 keeping the feed end trunnion open so that feed will get into the

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  • Performance enhancement tools for grinding mills

    2009 8 26 In recognition of ore variability many current SAG mills are installed with variable speed drives capable of operating the mill through a wide and continuous range of speed values Mill speed and liner profile determine grinding media trajectories as shown in Figure 1 By increasing mill speed or the steepness of liner attack angle

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  • Changing sag mill liners type from Hi Low to Hi Hi at

    2021 9 14 of the SAG mill is transferred onto a vibrating screen The oversize material is crushed in a pebble crusher and the undersize is combined with the ball mill 6 71 9 91 m discharge and sent to the cyclones The SAG mill in phase 1 uses two 4100 kW synchronous motors and works with a constant 10 5 rpm rotational speed in two

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  • Ball Mill

    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 The feed to ball mills dry basis is typically 75 vol

    Get Price
  • Performance enhancement tools for grinding mills

    2009 8 26 In recognition of ore variability many current SAG mills are installed with variable speed drives capable of operating the mill through a wide and continuous range of speed values Mill speed and liner profile determine grinding media trajectories as shown in Figure 1 By increasing mill speed or the steepness of liner attack angle

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  • SAG Mills and spares

    SAG Mills and spares 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 Attrition between grinding balls and ore particles causes grinding of finer particles SAG mills are characterized by their large diameter and

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  • Gearless mill drives

    2021 2 16 28 MW GMD for a 40 SAG mill 28 MW GMD for 42 SAG mill Whether it is size or an installation at the highest altitude 4600 m a s l ABB s GMDs are well positioned to contribute to the building of larger and ever more powerful mills Leading the gearless mill drive evolution The ABB gearless mill drive GMD is the most powerful

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  • sag mill gmd how does it work

    2012 11 7 SAG mill grinding process Gearless mill drives systems Gold GMD system SAG mill For a SAG mill with 15 MW of power a difference of 2 in drive Inching is used to position the mill for maintenance work such as More detailed

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  • can sag mill and ball mill have the same dimensions

    2013 2 26 Mill grinding Wikipedia the free encyclopedia Industrial ball mills can but utilize grinding balls to aid in grinding like in a ball mill A SAG consists out of two rollers with the same dimensions More detailed

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  • can sag mill and ball mill have the same dimensions

    2013 2 26 Mill grinding Wikipedia the free encyclopedia Industrial ball mills can but utilize grinding balls to aid in grinding like in a ball mill A SAG consists out of two rollers with the same dimensions More detailed

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  • Optimization and Performance of Grinding Circuits The

    Semi Autogenous Grinding SAG mill and a ball mill The SAG mill circuit also includes a single deck screen and a cone crusher while the ball mill circuit utilizes hydrocyclones Currently the grinding circuits are inefficient in achieving the aspired product fineness work index obtained for the current ore ranges between 17 2018 70

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  • THE COMMINUTION CIRCUIT DESIGN FOR THE

    2018 2 20 mill work index 11 4 kWh/t and an average RQD of 44 RQD values of 25 resulted in a SAG mill feed size F80 between 55 and 60 mm and throughputs of 6200 t/h RQD values of 55 resulted in SAG mill feed size F80 of over 70 mm and a SAG mill throughput of 5200 t/h The Batu Hijau SAG mill specific energy was a function of point load test and

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  • How grinding mill design changed over the last 30 years

    2020 6 3 Grinding mills are some of the most important equipment in mines processing over a few thousand tons of ore every hour It is not uncommon to see these days that a single line of a grinding circuit consisting of a Semi Autogenous Grinding SAG mill followed typically by two ball mills generating over USD 1 million of revenues per day

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  • 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 6 7 The largest SAG mill is 42′ 12 8m in diameter powered by a 28 MW 38 000 HP motor 8 A SAG mill with a 44

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  • SAG Mill Trommel Screens

    The SAG mill trommel screen provides a simple mechanism to classify large volumes of mill product Many designers and mill operators believe that the benefits of simplicity and the ability to handle throughputs in excess of 5 000 tph of solids make trommels the preferred equipment for this application

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  • How Does A Sag Mill Work

    Bond Ball Mill Work Index kWh/t SAG kWh/t from 152mm to T80 1 7mm Up to 2007 2008 Data SAG Mill 75 32 00 986 4 17 0 1838 13 12 9 916 7 394 10 000 32 13 1 Modifying the sag mill feed size distribution Secondary

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  • Optimization and Performance of Grinding Circuits The

    Semi Autogenous Grinding SAG mill and a ball mill The SAG mill circuit also includes a single deck screen and a cone crusher while the ball mill circuit utilizes hydrocyclones Currently the grinding circuits are inefficient in achieving the aspired product fineness work index obtained for the current ore ranges between 17 2018 70

    Get Price
  • SAG mill wear optimization using DEM simulation

    2018 3 13 Video 1 Mill Showing Surface Wear Modification Case scenario Consider a large SAG mill with a diameter of 10 97 m as shown in Figure 1a The mill has a high definition line design with alternating lines of high and low elevators Figure 1b The mill processes rocks from 200 mm to 300 mm using 350 mm steel balls as the grinding medium

    Get Price
  • how does a sag mill work

    AG/SAG 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 AG/SAG milling extends itself to many applications how does the sag mill workssmoothfab

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  • Operation Analysis of a SAG Mill under Different

    As one of the machines widely used in mining a semi autogenous grinding SAG mill can significantly improve the roughing efficiency of rock But the SAG mill still faces the obstacles of significant energy consumption and empirical operation parameters In order to obtain the optimal operation parameters of a SAG mill in this paper the discrete element method DEM is used to simulate the

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  • SAG mills

    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 SAG mills are also an optimum solution for wet grinding since crushing and screening in these

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  • INFERENTIAL MEASUREMENT OF SAG MILL

    2021 8 4 Authors final version of paper published in Minerals Engineering 22 12 1032 1044 Oct 2009 INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV INFERENTIAL MODEL VALIDATION T A APELT § and N F THORNHILL§ § Centre for Process Systems Engineering Imperial College SW7 2BY Email thomasapelt yahoo

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  • SAG Mill

    SAG Mill Grinding Solutions offers the following tests for SAG mill testing and/or sizing JKTech Drop Weight The JKTech Drop Weight Test measures the breakage characteristics of an ore for five size fractions in the range of 13 to 63 mm at various energy inputs 0 1 to 2 5 kWh/t

    Get Price