Sag Mill Example To illustrate the power of fuzzy logic we will next look at its application in controlling a typical sag mill circuit as is shown in Figure 2 Figure 2 Typical Sag Mill Configuration as Defined in KnowledgeScape An example of controlling SAG mill speed will be ,
Get PriceIf the SAG mill is not intended to be the rate-limiting step in a process plant, then it is best to adjust the SAG load (and power) to hold a constant tonnage to satisfy another constraint elsewhere Underground mines are an example: the hoisting capacity of the mine shaft is the rate-limiting step in the process, and the SAG mill must adapt to .
Get PriceThe SAG Mill is a machine added by Ender IOIt uses Micro Infinity (µI) to grind (or mill) items into their crushed variants, like Ores into DustsThe SAG Mill has four output slots; recipes can have 1-4 different outputs, with different chances of obtaining those outputs Uniquely, the SAG Mill can use Grinding Balls made from various materials to increase energy efficiency (resulting in .
Get PriceThe 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 .
Get PriceWith improved SAG mill control stability, the mill load can be optimized to increase crushing performance and produc - tion capacity Along with the potential for greater produc - tion, BrainWave also allows you to operate your mill at maximum efficiency Because a large amount of power is used just to keep the mill and its ball charge moving .
Get PriceSAG 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′ (128m) in diameter, powered by a 28 MW (38,000 HP) motor [8] A SAG mill with a 44 .
Get PriceWhen the feed size of a SAG mill becomes coarser, ie α r increases, the energy required to break the ore increases, ie φ r and φ f increases (Morrell et al, 1996; Morrell and Valery, 2001 .
Get PriceIn 2012, Raglan Mine encountered instability issues with one of its semi-autogenous shredders because of variations in ore composition Unfortunately, this instability led to a drop in productivity, equipment breakage, premature wear of mill cladding, increased energy costs and, finally, a marked reduction in the volume of processed ore
Get PriceACOUSTIC EMISSIONS MONITORING OF SAG MILL PERFORMANCE SJ Spencer, JJ Campbell, KR Weller and Y Liu CSIRO Minerals, PO Box 883, Kenmore, QLD 4069, Australia ABSTRACT Particle grinding .
Get PriceNov 20, 2008· St Ives Gold Mine recently implemented an 11 m semi-autogenous grinding (SAG) mill to its gold processing mill Developed in conjunction with ,
Get PriceApr 29, 2002· Fig 3 compares the regulatory response of two robust SAG mill controllers to a number of step changes in the disturbance variable F 80At t=5 h, F 80 was stepped up from 615 to 633 mm (ie the feed particle size distribution was increased), while at t=36 h, F 80 was stepped down from 633 to 577 mm (ie the feed particle size distribution was decreased)
Get Pricehistorically, Mine-to-Mill has – focussed on blasting alone – generation of more fines • pass through SAG mill onto ball mill circuits • higher throughput (eg 10% to 30%) • coarser grind size (possibly) fine
Get PriceAug 25, 2004· We have an application in a SAG Mill where we have installed an electronic ear in order to listen the noise produced by the balls falling to the bottom of the mill Our idea is to convert the amplitude and frequency of noise to a 4-20mA signal (or something else) in order to determine if the ball is crushing the mineral or the mill lining
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 Fuller-Traylor SAG/AG Mills range in size from 43m through 122m in diameter with powers as high as 28,000 kW
Get PriceNov 26, 2019· The biggest characteristic of the sag mill is that the crushing ratio is large The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 01 mm The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill’s .
Get PriceThe results showed that the HPGR-ball mill circuit achieved a 21% reduction in energy consumption over the existing SAG-ball mill circuit at the same P80 grind size of 160 mircons (μm) At a grind of 80% passing 75 μm, the HPGR-stirred mill circuit showed a 34% reduction in ,
Get PriceSAG mill control fundamentally means managing the load in the mill by adjusting the feed rate of ore to the mill and/or manipulating the rotational speed of the mill The best way to measure load is to mount the mill on load cells The load cells are calibrated to measure the total weight of water, grinding media (balls) and ore in the mill .
Get PriceAug 29, 2018· The evolution of the Cadia 40’ SAG mill to treat the Cadia East orebody – a case study of incremental change leading to operational stability Watch Glencore Mount Isa lead zinc flotation circuit – experiences from the implementation of model predictive control Watch
Get PriceOct 10, 2016· "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 conditions
Get PriceSAG 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% The largest SAG mill is 42' (128m) in diameter, powered by a ,
Get PriceSAG mill can be applied as the first stage grinding equipment It can effectively avoid the occurrence of sliming phenomenon, and avoid further grinding of fine particl It can play a good role in controlling granularity and energy saving Advantage of SAG Mill Infrastructure investment and equipment cost is lower than common process;
Get Priceadequately control the mill; resulting in poor stability, frequent operator interventions and less than optimum performance This paper describes the successful integration of advanced field systems such as mill feed image analysis (Wipfrag) and crusher gap controller (ASRi), into a multi-variable fuzzy logic SAG mill controller
Get PriceThe 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
Get PriceJun 06, 2016· SAG Mill Design and Specification The Kidston plant was designed to process 7500 tpd fresh ore of average hardness; but to optimise profit during the first two years of operation when softer oxide ore will be treated, the process equipment was sized to handle a throughput of up to 14 000 tpd Some of the equipment, therefore, will become .
Get PriceJan 01, 2013· A cone crusher reduces the SAG’s discharge screen’s oversize material A 14 foot diameter ball mill ensures final grinding before the flotation stageMany control strategies were used at the SAG over the past few years Fuzzy Logic was first used in 2007 in order to control tonnage feed to the SAG
Get PriceControl of -SemiAutogenous Grinding(SAG) mill weight is an example of an important process that exhibits many of these aspects Maintaining the SAG mill weight at the optimum value is critical for achieving maximum grind rate efficiency and mill production (Powell, MS, van der Westhuizen, AP, & Mainza, AN 2009)
Get Pricemechanism of sag mill_Mill (grinding) WikipediaSAG is an acronym for Semi-Autogenous Grinding SAG mills are autogenous mills but use grinding balls like a ball mill A SAG mill ,
Get PriceIn the typical grinding mill circuit that deploys a SAG mill, the mill is accompanied by a sump and a process recycle loop that includes a hydrocyclone (Figure 1) Mill input material consists of ore, recycled grind product and water The mill content forms slurry that exits as mill ,
Get PriceThe paper is illustrated by trend plots taken from a SAG mill in a major gold mine The paper goes on to explain the practical causes of the instability ranging from inappropriate type 2 control strategies to poor control loop tuning and to inappropriate operator intervention caused by lack of operator training
Get PriceAug 16, 2021· Outotec will deliver a high-capacity, high-powered Premier™ SAG mill to Northern Star Resources Limited’s Thunderbox gold mine expansion located in Yandal Belt, north of Kalgoorlie in Western Australia The typical value of such a delivery is approximately EUR 15 million depending on the final scope The order has been booked in .
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