The Morrell CModel is a generalised tumbling mill model and is not specific to SAG mills The model was adopted for use in the JK SimMet software package and this paper is based on the description in a JK Mineral Research Centre publication NapierMunn et al 1996...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.
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DetailsThe power draft of a SAG mill and its consequences are illustrated in Figure 2 wherein 5 days of operating data in a 32u14ft SAG mill is plotted The power draft of the mill is held between 6 and 7 MW whereas tons per hour tph of ore feed to the mill shows wide variations between 1000 and 1600 tph
Get PriceDec 19 2014 Advantages of SER drives for SAG mills Advantages of SER drives for SAG mills So for a fixed torque and higher speed the power obtained from the motor is higher than the motor nameplate rating I expect that this type of drive would be the most common large mill variable speed mill drive in the worlds minerals processing industry for
Get PriceThe mill power draw models are used to predict how much power will be consumed by a particular type of mill mill geometry and set of mill operating conditions This power is transferred to the ore and used to predict the throughput when combined with the specific energy consumption models
Get PriceLarger ball and SAG mills with higher installed power ratings relative to the mill diameter offer higher efficiency and throughput roundthe to grind ABB has delivered some of the worlds largest GMDs 22 MW GMD for 28 ball mill 28 MW GMD for a 40 SAG mill 28 MW GMD for 42 SAG mill Whether it is size or an installation
Get PriceApr 17 2018 Mill Sizing After laboratory and pilot plant testing confirm the feasibility of autogenous or semiautogenous grinding it can be used to establish the exact grinding circuit and mill sizeIn the pilot plant tests the tare power of the pilot plant mills should be determined before and after each test run The tare power should be for the empty mill
Get PricePredicting SAGAG Mill and HPGR Specific Energy Requirements Using the SMC Rock Characterisation Test power draw and product size distribution will be Figure 4 Dropweight Tester power draw of AGSAG mills modelling and
Get PriceControl solutions for SAG mills 02 The solution Measure BrainWave SAG mill is a unique control package using patented modelbased predictive adaptive control technology It is well known within the mining industry that effective grinding in a SAG mill depends large amount of power is used just to keep the mill and its ball charge
Get PriceBarratt developed a chart of Power Numbers for SAG mills that was published in Barratt DJ amp Sherman M Selection and Sizing of Autogenous and SemiAutogenous Mills Mineral Processing Plant Design Practice and Control
Get PriceApr 18 2018 SAG Mill Components and trunnion bearing sizes required to carry the load and to give the required openings for feeding and discharging the mills Mill heads are key structural components of any grinding mill They must carry the load of the shell assembly liners media and material in process and transmit it evenly to the trunnion
Get PriceMill power models have been used in a variety of ways in industrial practice since power directly equates to throughput and fineness of ground product We first start with HoggFuerstenau Power Model and show how this model successfully predicted the power draw of many grinding mills
Get PriceThe traditional operation of SAG mills relies on the operator to adjust the manipulated variables to maintain the target mill load and power draw Changes to the ore hardness feed size or ore specific gravity require an alert operator to adjust the variables while
Get PriceThe mill product can either be finished size ready for processing or an intermediate size ready for final grinding in a rod mill ball mill or pebble mill 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
Get PriceJan 30 2019 Mill power models have been used in a variety of ways in industrial practice since power directly equates to throughput and fineness of ground product We first start with HoggFuerstenau Power Model and show how this model successfully predicted the power draw of many grinding mills in several mining operations Then we show how this model was on the verge of being able to predict
Get PriceGearless mill drives are a well established solution for grinding applications in the minerals and mining industries The paper describes the functionality and technical features of such drive systems as well as their advantages compared to other drive solutions Due to the variable speed operation the grinding process can be optimized for ores with varying grinding properties
Get PriceDec 31 1995 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
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 PricePower model on data of four SAG mills treating sulphide copper ores in Chile In these circuits the SAG mill is the largest energy consumer In many engineering projects either a power equation andor a specific energy equation are used for the designing of these mills but not always with acceptable results In general these equations are
Get PriceFigure 1 History and Development of Large Mill Power and Mill Sizes for Primary Mills in SABC Circuits for DL whether for wet or dry operation At the time SAG mill is rated at 29 MW and 78 CS with a 42 ft dia mill built but not yet operational The more recent option
Get PriceAGSAG 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
Get PriceGrinding Solutions offers an extensive range of comminution services ranging from SAG mill testing to fine and ultrafine grinding Tests range from industry standards such as Bond Work Index Testing to cuttingedge techniques such as pulp chemistry monitoring to help optimise comminution circuits
Get PriceThe hours days or weeks needed to get a mill back on line are often filled with tense periods of troubleshooting and scrambling to locate and acquire needed parts and the characteristics that make SAG mills such robust performers powerful drives massive components and capacity to carry a thousand tons or more of ore and grinding balls
Get PriceJan 20 2020 The Simple SAG Mill is a machine added by Ender IO It uses Micro Infinity I to grind or mill items into their crushed variants like Ores into Dusts The Simple SAG Mill has four output slots recipes can have 14 different outputs with different chances of obtaining those outputs Similar to Ender IOs other Simple machines capacitors cannot be used in the Simple SAG Mill so its
Get PriceAttrition mill is a type of grinding mill by kinds of media to crush lump to powderlike substances The impact can be rock on rock such as in an Autogenous Grinding AG mill rock and a small ball charge 10 used in Semi Autogenous Grinding SAG mills balls of various sizes in Ball Mills and less commonly these days steel rods in Rod Mills
Get PriceOperation of large SAG mills requires a change in the conceptual approach to grinding processes The traditional energy consumption criteria are now enhanced with new criteria derived from the mechanical dynamics of the mill load
Get PriceNov 03 2016 Then in the late 1980s when the price of copper rose quickly from a low of 062lb to a high of 162lb this substantial increase in price further fuelled the industry demand for larger diameter SAG mills with mill power quickly doubling from 15000hp to 30000hp 1100022000kW
Get PriceWe are essentially providing up to twice the power transmission of a conventional dual pinion drive Gearless mill drive GMD technology has further expanded the use of large SAG milling allowing Metso Outotec to produce the worlds largest SAG mill of 42 in diameter drawing power at 28 MW
Get PriceSingle 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 FullerTraylor SAGAG Mills range in size from 43m through 122m in diameter with powers as high as 28000 kW
Get PriceSAG mill power draw models are used in mill design and grinding circuit modelling to predict predictions made by two published mill power draw models for SAG mills Austins SAG model and Morrells Cmodel A third model Hogg and Fuerstenau is fit to each survey and the principal fitting
Get PriceOct 19 2020 The SAG Mill is a machine added by Ender IO It uses Micro Infinity I to grind or mill items into their crushed variants like Ores into Dusts The SAG Mill has four output slots recipes can have 14 different outputs with different chances of obtaining those outputs
Get PriceThe Fimiston 1097 m 36 ft SAG mill uses twin wound rotorgearbox pinion drives with variable speed achieved through CCV systems The CCV ring motor gearless drive is used at Cadia 20 MW and Olympic Dam 18
Get PriceSAG mill has a much larger diameter compared to its length Yet the SAG mill of Newmonts Yanacocha mine in Peru is a single stage mill no ball mill after the SAG mill and The figure shows the power density figure for SAG and ball mills over the past 15 years during which ABB was supplying the GMD
Get PriceCrusher is METSO C200 product size 300 mm closed side setting 200 mm and power 400 KWH SAG mill size is 28 ft dia x 16 ft lenth ore density 34 WI 130
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