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sag mill control fl

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SAG Mill Control: It Shouldn’t be that Hard | E & MJ A control strategy recently implemented on a large variablespeed SAG mill at MMG’s Century Zinc operat

sag mill control fl

  • SAG Mill Control: It Shouldn’t be that Hard | E & MJ

    A control strategy recently implemented on a large variablespeed SAG mill at MMG’s Century Zinc operation in Australia is shown in the chart (found on pg 32) In this case, mill speed is the primary manipulated variable used to control mill load While there is no generic control strategy for SAG milling there is a considerable amount of reusable engineeringSAG and AG Mills operate by lifting ore/grinding media and dropping it on the operating bed of the mill charge High impacts from lifting ore and media promote impact breakage which is the primary mechanism for size reduction in the mill Via the use of sophisticated instruments and software, we closely monitor the mill impact location to boost the grinding efficiency of your operationAutogenous and SemiAutogenous Mills | SAGwise uses acoustic sensors and proprietary process control software to predict and adjust the SAG mill operation according to impacts on your mill and other main process variables The acoustic sensors ensure regular and accurate adjustments to mill loading This digital solution is inspired by experienced plant operators’ ability to listen to the mill load for critical steelonsteelOptimise SAG mill capacity and avoid

  • OPTIMAL SAG MILL CONTROL USING VIBRATION & DIGITAL

    Gainesville, Florida USA 32609 (*Corresponding author: [email protected]) VANCOUVER 2015 2 | P a g e 2/23/2017 OPTIMAL SAG MILL CONTROL USING VIBRATION & DIGITAL SIGNAL PROCESSING TECHNIQUES ABSTRACT Recent developments in low power wireless and Digital Signal Processing (DSP) technologies have given rise to a new system that canTo participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Grinding OR Select a Topic that Interests you Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent) Using Add Reply allows you to Attach Images or PDF files and provide a more complete input Use Add Comment = to comment on someone else’sSAG Mill Process Control Grinding & ClassificationHowever, SAG mill weight is difficult to control as the dynamic response changes as the mill approaches maximum capacity Near maximum capacity, the weight response exhibits integrating behavior, and the mill can overload quickly This situation is complicated by the transport delays in the feed system, so it is important that the control system can detect the imminent overload and adjustSAG Mill Optimization using Model Predictive Control

  • Evolution of SAG Mill Process Control at the Xstrata

    Evolution of SAG Mill Process Control at the Xstrata Nickel Raglan Operation Erik Bartsch1, Chief Engineer Guy Comeau2, Senior Metallurgist Colin Hardie3, Former Chief Metallurgist 1 Process Control Group, Xstrata Process Support 6 Edison Rd, Falconbridge, Ontario P0M 1S0 PH: (705) 693 2761 X 3438 Email: 2 Raglan Mine, Xstrata Nickel PH: (819) 762 7800Fuzzy Sag mill federate rules SPEED CONTROL RULES In general, a high speed is preferred since more grinding occurs when the rocks experience more and harder impacts However, a high speed may throw grinding balls too far so as to impact the liner and not rock, thereby increasing liner wear These ballonliner impacts cause a lot of noise, so sound is often used to control the mill speedUsing Fuzzy Control to Optimize SAG Mill ProductionGrinding mill machine is an essential part of many industrial processes, there are mainly five types of mills to cover more than 90% materials sizereduction applications Do you the difference between the ball mill, rod mills, SAG mill, tube mill, pebble mill? In the previous article, I made a comparison of ball mill and rod mill Today, weWhat's the Difference Between SAG Mill and Ball Mill

  • Optimum SAG Mill Discharge Density Grinding

    To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Grinding OR Select a Topic that Interests you Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent) Using Add Reply allows you to Attach Images or PDF files and provide a more complete input Use Add Comment = to comment on someone else’sSAG mill optimisation Take control of your SAG mill process Reducing downtime through data Downtime is the most inefficient thing of all for a processing plant, costing hundreds of thousands of dollars each hour Mill loading is key to running the mill more efficiently and at lower expense If a load is too full, inefficient ore reduction leads to high energy consumption If the load is tooSAGwise™ total process control The key to efficient SAGAutogenous and semiautogenous grinding have experienced renewed interest as efforts to reduce operating and capital costs have increased As a result, the mill operator is faced with new equipment perhaps ten times as large as was common in the sixties and new circuit designs with different operating characteristics No longer can he grab a handful of mill discharge to estimate the sizeHow to Control a SAG Grinding Mill Circuit

  • (PDF) SAG mill circuit optimisation at Ernest Henry

    ARM, OMC and FDW have all recommended a fl owsheet consisting of SAG milling in closed circuit with a vibrating screen followed by a ball mill in closed circuit with hydrocyclones There wasPrior to the SAG mill control system being implemented the control room operator used to run the SAG mill manually The benefit of this control system is two fold The first is an increase in(PDF) SAG milling at the Fimiston plant (KCGM)SAG Mill Control January 1, 2011 SAG Mill Control Download Project Profile Customer Global Mining Company Location Western Africa Plant Details Gold processing plant Control System Wonderware Project Overview A gold mine in Western Africa wanted to expand the plant in order to double capacity To increase and optimise production, Mipac was commissioned to improveSAG Mill Control Mipac

  • Optimizing your SAG mill operation International Mining

    Similar to the impeller design affecting pump capacity, the pulp lifter design affects the discharge capacity (or mill throughput) of AG and SAG grinding mills Generally, the discharge from AG/SAG mills consists of one or both of the following components: slurry (water and finer particles) and pebbles (20100 mm) Single stage AG/SAG mills have to handle large amounts of slurry as they areSAG mill discharge control is quite involved due to few interactive variables, such as mill discharge sump level, classification hydrocyclone variables (feed density, flow and pressure) and water feed rate to the sump Model predictive control (MPC), which is a multiinput multioutput (MIMO) controller, is very suitable for this purpose If a particle size analyser is installed it can beThroughput optimisation in milling circuitsThe Manta Cube ® system can be used to control various processing units and has been successfully used for SAG Mill Control, Ball Mill Control, Flotation Control, Thickener Control, CCD Control and more The Manta Cube ® utilises advanced control fundamentals, including constraint control, feed forward control, expert system control, gain scheduling, object oriented control, decouplingWelcome to Manta Controls Manta Controls

  • Difference Between Sag Mill vs Ball Mill mech4study

    · 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 pieces 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 partially Interior of the drum uses the lifting plates These plates· Examinamos los principios del rompimiento de mineral en un molino SAG e identificamos los parámetros que gobiernan el quebrado de la roca y el rendimiento Smill scanner (optimización para molinos SAG)· 24 Multivariable predictive control In the present work, a threeinputthreeoutput scheme of control was performed The total water feed to the mill (the feed water flow rate was added to the dilution water flow rate, so they could be specified separately, but for the SAG mill model, the total water content was the variable of interest), the fresh ore feed rate, and the mill rotation speedModel predictive control of semiautogenous mills (sag

  • Control optimization for a SAG mill at the Raglan Mine |

    Made up of metallurgists, advanced control experts, programmers, technicians and automation engineers, the BBA team proposed using fuzzy logic to stabilize SAG mill behaviour for the nickel mine It’s a technique used in artificial intelligence that requires finesse, knowhow and exhaustive analyses A followup performed a year later showed that the mill had excellent stability BBA’sThis is excellent for good SAG mill control There are three major sources of disturbances that produce instability in the grinding circuit These are, 1 Coarse ore stock pile feeder trips 2 Large variability in ore competency in the mill feed 3 Recycle Crusher Operation Controlling a SAG mill utilising older control techniques will give adequate control, however in order to provide control2 0 0 6 Welcome to Manta Controls Manta ControlsSAG Mill Control: it shouldn't be that hard An economically appealing method for improving operations is available without the capital expense — get more out of a mill by applying the advanced control capabilities in the existing plant control systemSAG Mill Control: it shouldn't be that hard CEEC

  • A Neural Network Model for SAG Mill Control

    feed size distribution, each SAG mill will process between 700 and 3000 tph The budgeted average total throughput is 88,000 tpd THE OK TEDI ADVANCED CONTROL SYSTEM IMPLEMENTATION The SAG expert system at Ok Tedi was completed in 1999, described previously by McCaffery, Katom, and Craven (2001) It runs within the MET (MinnovEX ExpertSAG Mill Control Instability: Causes and Solutions Oscillatory unstable behaviour in a SAG mill is characterised by the mill constantly cycling between an overload condition and recovery from that condition by a substantial reduction in feed rate tonnes Such behaviour is commonplace with SAG mills and gives rise to a significant overall reduction in average throughput which might be as highSAG Mill Control Instability: Causes and Solutions CEECSAG mill discharge control is quite involved due to few interactive variables, such as mill discharge sump level, classification hydrocyclone variables (feed density, flow and pressure) and water feed rate to the sump Model predictive control (MPC), which is a multiinput multioutput (MIMO) controller, is very suitable for this purpose If a particle size analyser is installed it can beThroughput optimisation in milling circuits

  • Optimizing your SAG mill operation International Mining

    Similar to the impeller design affecting pump capacity, the pulp lifter design affects the discharge capacity (or mill throughput) of AG and SAG grinding mills Generally, the discharge from AG/SAG mills consists of one or both of the following components: slurry (water and finer particles) and pebbles (20100 mm) Single stage AG/SAG mills have to handle large amounts of slurry as they areThe Manta Cube ® system can be used to control various processing units and has been successfully used for SAG Mill Control, Ball Mill Control, Flotation Control, Thickener Control, CCD Control and more The Manta Cube ® utilises advanced control fundamentals, including constraint control, feed forward control, expert system control, gain scheduling, object oriented control, decouplingWelcome to Manta Controls Manta Controls· 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 pieces 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 partially Interior of the drum uses the lifting plates These platesDifference Between Sag Mill vs Ball Mill mech4study