• Optimizing your SAG mill operation - International Mining

    Optimizing your SAG mill operation. Posted by Matrix on 21st March 2007 Sanjeev Latchireddi, Chief Process Engineer – Grinding Americas, Outokumpu Technology, looks at the shift from ball mills to SAG mills. Nowadays, the more successful plants are those that have adopted effective and efficient strategies to optimize their plant operation.

  • SAG Mill Grinding Circuit Design

    Semi Autogenous Design FactorsSag Mill Operation ExampleProcess Plant DescriptionSag Mill Design and SpecificationOperating Problems Since CommissioningDesign Changes and Future Operating StrategiesThe design of large mills has become increasingly more complicated as the size has increased and there is little doubt that without sophisticated design procedures such as the use of the Finite Element method the required factors of safety would make large mills prohibitively expensive.In the past the design of small mills, up to +/- 2,5 metres diameter, was carried out using empirical formulae with relatively large factors of safety. As the diameter and length of mills increased several crit...
  • SAG/Ball Mill Optimization KnowledgeScape

    The results in SAG-Mill line 2 are even more dramatic. Because of segregation on the coarse feed stockpile, SAG-mill 2 receives a higher percentage of coarse material. The KnowledgeScape strategy’s ability to maintain smooth and stable operation of the mill was more apparent when contrasted to the DCS control on the “difficult” line.

  • Optimization of mill performance by using

    mill under steady state then cutting off all feed streams to the mill as it is being stopped. Sufficient time is required to obtain all the important measurements correctly during the crash stop. The mill filling should be measured at a minimum of 3 points along the mill. Excess of slurry could also be estimated. To get rid of pulp and rocks in ...

  • Minerals Free Full-Text Optimizing Performance of SABC ...

    The discharge grates of the SAG mill were identified as a key component in the SABC circuit, and their design is a crucial factor in the mill’s performance [17,18,19,20,21]. The initial design of the grate section caused a serious accumulation of pebbles within the SAG mill

  • Cited by: 2
  • (PDF) Optimisation of the Cadia Hill SAG mill circuit

    The discharge grates of the SAG mill were identified as a key component in the SABC circuit, and their design is a crucial factor in the mill's performance [17][18][19] [20] [21]. The initial ...

  • (PDF) Maximising SAG mill throughput at Porgera gold mine ...

    Maximising SAG mill throughput at Porgera gold mine by optimising blast fragmentation

  • Increased production and energy efficiency for optimized ...

    Apr 24, 2014  These higher energy intensity blasts produced even finer Run-of-Mine (ROM) fragmentation and subsequently finer feed to the SAG mill. The SAG feed F80 (the size that 80% of the feed material is smaller than) was reduced to around 50-60 mm compared to 100–120 mm previously, and the percentage of fines (-10mm material) was increased from 25% to ...

  • optimising a sag mill - pastoriezelem.be

    Optimising SAG mill throughput A case study in tuning Presented by 1 000 000 ounces At 425 US per ounce that was 63.75 million US increase per year Not possible without increasing SAG mill throughput Extra energy used 7 The difference in energy usage between the unstable zone and the stable zone is the unstable zone averages 25 more .

  • C0031_Pictures_Text

    Optimising SAG mill throughput: A case study in tuning Presented by: Paul Wilson Technology Manager Calibre Automation, Communications Technology Group * * * * * * * * * * * * * * * * * * * * * * * * * * Two SAG mills 1 Porgera Mine, PNG 4.5 Megawatt, variable speed drive About 500 tonnes per hour per mill Highly variable lithology with ...

  • STEPPING FORWARD: USING VARIABLE SPEED DRIVES FOR ...

    The 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

  • Optimising the Drill and Blast cycle with FRAGTrack™

    - SAG mill throughput improvements by optimising primary crusher settings - increased explosive energy trials with Fortis™ Extra - increasing powder factors - pattern expansion trials in waste - Electronic Blasting Systems (EBS) trials with i-kon™ Unlike dig rates or crusher throughput which may be influenced by external factors, fragmentation,

  • Optimising Western Australia Magnetite Circuit Design

    Fig. 6: Levin test for the ball mill The Levin test for fine ball mill product predicts a net specific energy requirement of 52.5 kWh/t to grind from an F80 of ~400 µm (AG mill/magnetic separator product) to a P80 of 34 µm. An additional 2.3 kWh/t would be needed to reduce the plant feed P80 of 770 µm to the test feed P80 of 420 µm,

  • Increase throughput and capacity in SAG mills

    Optimising the capacity of your SAG mill is crucial to avoiding downtime and liner wear and damage. With variances in mill ore feed rate, mill speed and slurry density, critical impacts can occur in your SAG mill. The speed at which these variances are adjusted for is thus crucial for minimizing damage and optimizing liner life.

  • MILLING CONTROL OPTIMISATION - MINTEK

    By optimising the mill power usage and preventing mill overloads, significantly increases in throughput from 6 to 16% have been achieved. ... Figures 8 and 9 on the right show results from a gold plant’s SAG mill achieved with MillStar’s Segregated Ore Feed Controller combined with the Power Optimiser:

  • Comparing metal cap and steel lining systems in Philsaga ...

    May 28, 2020  Comparing metal cap and steel lining systems in Philsaga Mining Corporation’s SAG mill Our white paper showcases how composite mill linings improved gold recovery by 2%, increased SAG mill throughput by 20% and improved service life by 40% at Philsaga.

  • Optimising your SAG mill operation - ResearchGate

    Download Citation Optimising your SAG mill operation The optimal performance of AG/SAG mills is the key to successful plant operation. All AG/SAG mills using radial or curved pulp lifters ...

  • Solving Site Challenges from the Home Office Ausenco

    May 19, 2020  We helped increase competent-ore throughput by 27% by modifying the SAG mill internals, optimising SAG mill control and providing on-site training at the Phu Kham Gold-copper Mine in Laos We helped increase throughput by 25% by optimising the comminution circuit for different ore types and maximising asset utilisation, at a large gold mine in PNG.

  • SAGwise™ to revolutionise mill liner protection ...

    The new solution also saw a production increase of 6% and reduced process variability up to 30%. The SAGwise™ total process control solution employs state of the art process control technologies to reduce critical impacts to the desired targets, stabilising and then optimising the operation of the SAG mill.

  • Autogenous and Semi-Autogenous Mills

    Single 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. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

  • How HPGR compares to conventional milling

    Aug 19, 2019  Whether you’re designing a brand-new mill circuit or optimising an existing site for long-term efficiency, High Pressure Grinding Rolls offer a range of advantages over conventional milling techniques, including ball mills, SAG mills and rod mills.

  • Optimising your SAG mill operation - ResearchGate

    Download Citation Optimising your SAG mill operation The optimal performance of AG/SAG mills is the key to successful plant operation. All AG/SAG mills using radial or curved pulp lifters ...

  • Solving Site Challenges from the Home Office Ausenco

    May 19, 2020  We helped increase competent-ore throughput by 27% by modifying the SAG mill internals, optimising SAG mill control and providing on-site training at the Phu Kham Gold-copper Mine in Laos We helped increase throughput by 25% by optimising the comminution circuit for different ore types and maximising asset utilisation, at a large gold mine in PNG.

  • SAGwise™ to revolutionise mill liner protection ...

    The new solution also saw a production increase of 6% and reduced process variability up to 30%. The SAGwise™ total process control solution employs state of the art process control technologies to reduce critical impacts to the desired targets, stabilising and then optimising the operation of the SAG mill.

  • Autogenous and Semi-Autogenous Mills

    Single 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. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

  • How HPGR compares to conventional milling

    Aug 19, 2019  Whether you’re designing a brand-new mill circuit or optimising an existing site for long-term efficiency, High Pressure Grinding Rolls offer a range of advantages over conventional milling techniques, including ball mills, SAG mills and rod mills.

  • ball mills and sag mill problem

    A typical SAG-HPGR-Ball mill circuit suggested by Patzelt et al. [6] is shown in Figure 9.6, where the pebbles from the SAG mill are crushed in the high-pressure grinding rolls. It is a general observation that SAG mills are helpful for grinding where wide variations in the grindability of ores are experienced.

  • Selection of Comminution Circuits for Improved Efficiency

    In general, optimising fixed costs, such as labour costs, is most leveraging for low tonnage plants whilst optimising variable costs, such as energy consumption and ... Typically, a SAG mill based circuit (P80 of 106 to 150 um) has media costs of around A$1/t. Providing the ore is amenable, the use of primary autogenous milling can ...

  • Optimization and Control of a Primary SAG Mill Using Real ...

    Each Module at Waterval Concentrator (WvalC) employs a φ7.3 m x 8.2 m EGL SAG mills with 2 x 5200 kW motors in primary milling duty. Two silos containing Merensky and UG2 ore respectively feed the mill that operates at a fixed 75% of the critical speed. The circuit is closed with a 600 µm aperture classification screen with

  • Optimizing your SAG Mill Mining Surplus

    Mar 02, 2010  Optimizing your SAG Mill. Sanjeeva Latchireddi March 2,2010. As the ‘heart of the plant’ could be viewed as the milling/grinding area, one of the key steps in plant optimisation is, therefore, ensuring the mill is operating properly.

  • sag mill optimisation - denarrenkoning.be

    Optimizing your SAG mill operation. Optimizing your SAG mill operation Posted by Matrix on 21st March 2007 , As a result, mines have shifted their emphasis in optimization from ball mills to SAG mills...

  • Optimizing performance of AG/SAG mills – A design approach

    Jan 01, 2005  The SAG mill is usually followed by a ball mill to finish the size reduction prior to the concentration step. In the past when primary, secondary and tertiary crushers fed material directly to large ball mills, the energy efficiency of the concentrator was determined for the most part by the ball mill operation, whereas now the energy ...

  • Sag Mill Discharge Slurry Pump

    Mill discharge pumps MD500 SAG mill system animation - YouTube. Modern Semi-Autogenous (SAG) Grinding Mills can be up to 12 metres in diameter (absorbing up to 20 MW of power) and need to discharge over 2500 tonnes per hour of solids via pulp lifters. Pulp lifters take the form of a radial array of "box-section" channels mounted inside the ...

  • Mills - FLANDERS

    Optimizing stand-alone and coordinated systems. If you want to improve the productivity, reliability, efficiency, and safety of your milling operations, our mill control systems experts optimize and develop integrated control systems on the industry-leading platforms. Our mill control system expertise includes:

  • sag mill optimisation - jjgconstruction.co.za

    GrindingExpert™ is a true turnkey solution for optimizing SAG and Ball mill circuits, and our technical abilities implementing it are second-to-none. The KnowledgeScape adaptive control solutions work together to see, listen, and think about the best way to increase tonnage and optimize SAG and ball mills at all times and for all conditions.

  • sag mill optimisation - denarrenkoning.be

    Optimizing your SAG mill operation. Optimizing your SAG mill operation Posted by Matrix on 21st March 2007 , As a result, mines have shifted their emphasis in optimization from ball mills to SAG mills...

  • ball mills and sag mill problem

    A typical SAG-HPGR-Ball mill circuit suggested by Patzelt et al. [6] is shown in Figure 9.6, where the pebbles from the SAG mill are crushed in the high-pressure grinding rolls. It is a general observation that SAG mills are helpful for grinding where wide variations in the grindability of ores are experienced.

  • Optimizing your SAG Mill Mining Surplus

    Mar 02, 2010  Optimizing your SAG Mill. Sanjeeva Latchireddi March 2,2010. As the ‘heart of the plant’ could be viewed as the milling/grinding area, one of the key steps in plant optimisation is, therefore, ensuring the mill is operating properly.

  • Selection of Comminution Circuits for Improved Efficiency

    In general, optimising fixed costs, such as labour costs, is most leveraging for low tonnage plants whilst optimising variable costs, such as energy consumption and ... Typically, a SAG mill based circuit (P80 of 106 to 150 um) has media costs of around A$1/t. Providing the ore is amenable, the use of primary autogenous milling can ...

  • Optimization and Control of a Primary SAG Mill Using Real ...

    Each Module at Waterval Concentrator (WvalC) employs a φ7.3 m x 8.2 m EGL SAG mills with 2 x 5200 kW motors in primary milling duty. Two silos containing Merensky and UG2 ore respectively feed the mill that operates at a fixed 75% of the critical speed. The circuit is closed with a 600 µm aperture classification screen with

  • Sag Mill Discharge Slurry Pump

    Mill discharge pumps MD500 SAG mill system animation - YouTube. Modern Semi-Autogenous (SAG) Grinding Mills can be up to 12 metres in diameter (absorbing up to 20 MW of power) and need to discharge over 2500 tonnes per hour of solids via pulp lifters. Pulp lifters take the form of a radial array of "box-section" channels mounted inside the ...

  • Autogenous and Semi-Autogenous Mills

    Single 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. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

  • Mills - FLANDERS

    Optimizing stand-alone and coordinated systems. If you want to improve the productivity, reliability, efficiency, and safety of your milling operations, our mill control systems experts optimize and develop integrated control systems on the industry-leading platforms. Our mill control system expertise includes:

  • Optimizing performance of AG/SAG mills – A design approach

    Jan 01, 2005  The SAG mill is usually followed by a ball mill to finish the size reduction prior to the concentration step. In the past when primary, secondary and tertiary crushers fed material directly to large ball mills, the energy efficiency of the concentrator was determined for the most part by the ball mill operation, whereas now the energy ...

  • sag mill optimisation - jjgconstruction.co.za

    GrindingExpert™ is a true turnkey solution for optimizing SAG and Ball mill circuits, and our technical abilities implementing it are second-to-none. The KnowledgeScape adaptive control solutions work together to see, listen, and think about the best way to increase tonnage and optimize SAG and ball mills at all times and for all conditions.

  • Performance Characteristics and Optimisation of the ...

    by the installation of a 12MW SAG mill with a diameter of 10.97m (36ft). The mill, when built, was the largest SAG mill operating at any existing Australian mine. To aid in commissioning and optimising the mill, the Julius Krutt- schnitt Mineral Research Centre (JKMRC) and plant staff con- ducted extensive surveys of the grinding circuit.

  • Raj Mathiravedu and Angelo Labriola, Orica, Australia ...

    35.4% to 39.0%. Fines content in the SAG feed also increased by 8%. Furthermore, improved and consistent fragmentation has led to a better particle size distribution in the SAG mill feed, and the throughput consequently increased by 2.3%. This led to a decrease of 1.8% in SAG energy consumption and significant financial savings for the mine.

  • SAG Mill - Feed The Beast Wiki

    The SAG Mill is a block added by the EnderIO mod. A machine similar to a Pulverizer or a Macerator.It is used to process resources to produce dust. It accepts energy in the form of Redstone Flux or Minecraft Joule, with an internal buffer of 100,000 RF and consumption of 20 RF per tick.The energy storage capacity and processing speed can be increased by adding one of 3 tier of Capacitor into ...

  • Calibre Mill Optimisation Case Study Mill (Grinding ...

    Presentation to The Mill Optimisation Summit 2011. Optimising SAG mill throughput: A case study in tuning. Presented by: Paul Wilson Technology Manager Calibre Automation, Communications Technology Group Two SAG mills The mills Porgera Mine, PNG 4.5 Megawatt, variable speed drive About 500 tonnes per hour per mill Highly variable lithology with grinding factors from 6 to 18 kilowatt