The FAG mill feed conveyor delivers ore into the feed hopper the hopper also receives mill dilution water at a measured and controlled rate The mass load and power consumption of the mill is measured by mill bearing back pressure as well as an online acoustic device SAG analyser The mill is equipped with 70mm pebble ports and discharges SAG mill feed is not at its maximum SAG Mill Water Rul Each decision cycle the expert system calculates a change in the SAG mill water set point This change is applied added to or subtracted from the current set point A negative set point change will be applied if the SAG mill density is low

مزيد من المعلوماتFor comminution of finer particle size ranges 20mm >P 80 >30 μm machines like the ball mill vertical roller mill hammer mill roller press or high compression roller mill vibration mill jet mill and others are used For yet finer grind sizes sometimes referred to as ultrafine grinding specialist mills such as the IsaMill are usedThe PTI study focussed on ball mill limited material from the Apensu open pit Following a benchmarking study of all blasting crushing and grinding practices in January PTI recommended changes in both blasting and crushing conditions in order to generate a finer feed size to the SAG mill

مزيد من المعلوماتSAG is an acronym for Semi Autogenous Grinding SAG mills are autogenous mills but 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 motorI 203 INFLUENCE OF FEED SIZE ON AG/SAG MILL PERFORMANCE SMorrell1 WValery 1 1JKMRC Isles Road Indooroopilly Qld Australia e mail smorrell mailboxuqeduau

مزيد من المعلوماتModel Predictive Control on a SAG Mill and Ball Mills The solution for the SAG Mill is an adaptive controller which controls mill load using direct mill weight measurement or indirectly from bearing oil pressure The solution automatically controls ore master feed rate and water addition to increaseFor comminution of finer particle size ranges 20mm >P 80 >30 μm machines like the ball mill vertical roller mill hammer mill roller press or high compression roller mill vibration mill jet mill and others are used For yet finer grind sizes sometimes referred to as ultrafine grinding specialist mills such as the IsaMill are used

مزيد من المعلوماتThis sensitivity is due to the reliance of ag/sag mills on the feed ore for their grinding media competence and size Autogenous ag mills are the most sensitive in this respect with semi autogenous sag mills being increasingly less so as the ball charge is increasedModel Predictive Control on a SAG Mill and Ball Mills The solution for the SAG Mill is an adaptive controller which controls mill load using direct mill weight measurement or indirectly from bearing oil pressure The solution automatically controls ore master feed rate and water addition to increase

مزيد من المعلوماتOct 10 32 Although it is well known and easily experienced that the feed size distribution influences the throughput and stability of operation of a semi autogenous grinding SAG mill the details are poorly understood since it is often only the input and output measurements that are used to identify unfavourable in mill conditionsThe SAG Mill is a machine added by Ender IO It uses Redstone Flux RF to grind or mill items into their crushed variants like Ores into Dusts The SAG Mill has four output slots recipes can have 1 4 different outputs with different chances of obtaining those outputs

مزيد من المعلوماتOptimization and Control of a Primary SAG Mill Using Real time Grind Measurement CW Steyn K Keet W Breytenbach the primary mill product in an attempt to control and possibly reduce flotation feed size variability The objectives of this study were to employs a φ73 m x 82 m EGL SAG mills with 2 x kW motors in primary I 203 INFLUENCE OF FEED SIZE ON AG/SAG MILL PERFORMANCE SMorrell1 WValery 1 1JKMRC Isles Road Indooroopilly Qld Australia e mail smorrell mailboxuqeduau

مزيد من المعلوماتPredicting SAG/AG Mill and HPGR Specific Energy Predicting SAG/AG Mill and HPGR Specific Energy Requirements Using the SMC Rock Characterisation Test SMorrell SMCC Pty Ltd E mail email protected both in terms of quantity and particle size and to be versatile so as to make as much significantly influence AG/SAG mill feed size read moreSINGLE STAGE SAG/AG MILLING DESIGN ABSTRACT Single stage semi autogenous / autogenous S/AG milling has become a common design for a variety of ore The feed size must be realistic as an inappropriate particle size distribution PSD The SAG mill model in the JKSimMet software has not been shown to accurately reproduce the performance

مزيد من المعلوماتOct 12 32 SAG mill make use of steel balls included with some large and hard rocks for grinding These mills utilize the balls in making the large fragments of materials broken into piec The ball charge of a SAG mill is about 9 to 20 This process takes place inside the large rotating drum of SAG mill which is filled with balls partiallymill feed The cyclone overflow gravitated to the first leach tank via a trash screen Ball mill discharge combined with SAG mill discharge to form the feed to the screen See Figure 1 Screen oversize pebbles were conveyed to a recycle crusher where they were crushed and returned to the SAG mill feed

مزيد من المعلوماتThe 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 immediate size for further grinding in a ball mill pebble mill VERTIMILL or a stirred media detritor The discharge from the SAG mill is screened by a trommel screen mounted at the discharge end of the mill The oversize material is recycled to the SAG mill feed via conveyors and the undersize material is combined in the cyclone feed sump with the ball mill discharge and feed to the ball mill

مزيد من المعلوماتA two phased expansion of the mill facilitated the increased throughput Phase 1 added a new secondary crushing and screening circuit to decrease feed particle size to the SAG mill Phase 2 expanded the grinding rougher flotation and tailings deslime areas increasing capacity in the existing grinding cyclones and the deslime cyclones and Two new SAG milling models are developed in this work able to predict power or specific energy consumption including the usual design variables such as mill size balls charge level solids concentration in the SAG mill feed and of critical speed but adding a variable that represents the feed size

مزيد من المعلوماتThe feed size distribution together with the ore characteristics hardness lithology alterations etc are the most important factors affecting the SAG mills performanceSAG specific power range of about 3 to 9 kWh/t for this site The design of the ore stockpiling and conveying system contributes to fluctuating size distribution with significant short term segregation occurring under certain operating situations Depending on ore type and feed size distribution each SAG mill will process between 700 and tph

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