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the mining industry. Conventional grinding technologies were inefficient and had high specific energy demands. Even when the target size was achieved, flotation response was inadequate - primarily due to the impact of steel grinding media on surface chemistry. Faced with this challenge, MIM was forced to
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Grinding media types Until 2005, all IsaMill installations have taken advantage of the technology's ability to use low cost, but relatively low quality grinding media such as silica sand, river pebble, smelter slag or fine primary mill scats (autogenous milling). Whilst the IsaMill produces high energy efficiencies
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The primary metric for measuring the grinding efficiency of the IsaMill™ is the specific energy (kWh/t) required to achieve a certain grind size (generally the 80% and/or 98% passing size of the discharge, P 80, P 98). For each condition tested in 2.2 Pilot-scale testwork, 2.3 Full-Scale (M1000 IsaMill™) testwork, surveys of the IsaMill ...
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These IsaMill™ with sizes from 0.005 up to 20 m 3 is a horizontal stirred media mill with a perforated disc geometry and a classifier wheel at the product outlet. The IsaMill™ keeps the grinding media away from the discharge with its internal classifier and implies a counteracting current to the drag forces caused by the suspension flow.
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The IsaMill is primarily known for its ultrafine grinding applications in the mining industry, but is also being used as a more efficient means of coarse grinding. By the end of 2008, over 70% of the IsaMill's installed capacity was for conventional regrinding or mainstream grinding applications (as opposed to ultrafine grinding), with target ...
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Cleaning. Concentrate IsaMill McArthur River IsaMill M10,000 treating screened SAG discharge F80 300um to P80 45um Open circuit operation 45 micron Tower Mill and cyclones removed Rougher. Prefloat <1mm P80 300 microns SAG Mill 4MW. 7 micron grind. Cleaning + 1mm. Concentrate IsaMill BHPB Leinster 3.5 unit increase in Ni …
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Grinding Mechanism The IsaMill™ is a horizontally stirred mill consisting of a series of 8 discs rotating around a shaft driven through a motor and gearbox. The discs operate at tip speeds of 21-23m/s resulting in high energy intensities of up to 300kW/m3. Figure 2 illustrates the layout of the IsaMill™.
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The high efficiency of the IsaMill™ comes from its ability to use small media, with high surface area and high media/ particle collision frequency. Small media can still grind …
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grinding rolls (HPGR) and high speed stirred mill, have been developed and adopted in the hard-rock mining operation in order to reduce the energy consumption and improve the process performance. ... operating data. Mr. Amit Kumar and Mr. Javier Perez assisted with the IsaMill™ testing. Mr.
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The IsaMill (a horizontal stirred mill with a 3,000-L net chamber volume and a rated motor power of 1,120 kW) has successfully adopted a novel product-separator design, which has led to a major ...
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Grinding in the IsaMill TM with fully inert media is the next step to improved flotation recovery – improved liberation without detrimental effects on flotation chemistry resulting in good flotation performance across all size ranges. Improving flotation performance with inert grinding. A new tool to apply old principles.
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Products & Solutions Wet Grinding IsaMill. The patented IsaMill is a transformation in grinding technology based on high intensity stirred milling. The IsaMill was …
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The horizontal disk mills Discus are improved, continuous working laboratory and production machines for wide variety of applications. The disk agitator shaft activates the grinding media with high intensity …
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The scaleup procedures developed for the IsaMill were then compared against the full scale Century - SMD's. The IsaMill M4 procedure accurately predicted the full scale Century performance on a P 80 basis. This is intuitively correct though the mills have different designs (horizontal versus vertical), essentially –
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This paper will examine the use of IsaMill™ technology in fine grinding (P80 below 15 micron), and examine the use of the technology in conventional grinding applications …
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The IsaMill is a fine grinding technology developed through the collaboration of Mount Isa Mines Limited and NETZCH-Feinmahltechnik in 1990 [2]. The IsaMill is a horizontal, high speed stirred mill that operates with high power intensities and uses fine, inert grinding media such as river sand, smelter slag or ceramic beads.
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Open circuit batch ball mill compared with laboratory IsaMill to grind a feed of top size around 1 mm to a product P 80 less than 100 μm (Burns, 2007). • Full scale regrind ball mill in closed circuit compared with full scale IsaMill in open circuit to grind a feed of top size around 150 μm to a product P 80 less than 65 μm (Pease et al ...
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IsaMill™ at a glance > Real-world success in 130 metalliferous installations across 21 countries since launching in 1994 > World's only horizontal fine grinding mill, it avoids short-circuits and gives the highest availability > Most efficient fine grinding mill in the world > Strongest performance guarantee in the world > Most consistent product size
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IsaMill™ es una tecnología de molienda a gran escala y con alta e˜ciencia energética, desarrollada y probada en aplicaciones metalíferas muy exigentes. » Acerca de IsaMill™ El IsaMill™ utiliza más potencia por unidad de volumen que los molinos de bolas y los molinos de torre. Esto signi˜ca que ocupa poco espacio, se puede instalar
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Fig. 16 shows an M10 000 IsaMill TM at Minsur's San Rafael tin mine in Peru. The mill is used there for the B2 project for reprocessing tailings. Minsur is planning to produce around 51 000 t tin over a project duration of 9 years. The so far largest size of the IsaMill TM is an M15 000 with a drive power of 3.7 MW. Such a machine is in ...
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The IsaMill is a horizontal stirred mill with sizes up to 3 m3 chamber net volume and 1120 kW installed motor. It was jointly invented by Mount Isa Mines of Australia and Netzsch …
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cleaning, to produce a smeltable concentrate grade. IsaMill technology was selected to regrind rougher concentrate to 90 per cent passing 25 µm. Due to the scale of the WLTRP, the regrind power requirement was significant at 2.2 MW absorbed. For this duty, Anglo Platinum and Xstrata developed a larger IsaMill; the M10,000.
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Paul Telford, general manager at Glencore Technology, said: "The remoteness of the site means high energy efficiency and low installation cost is needed, which makes the horizontal IsaMill with its high energy efficiency and small footprint ideal for this application to reduce cost while achieving the grinding duty, We have had a long …
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The IsaMill™ addressed the two major issues of energy efficiency and the resultant downstream metallurgy, primarily through the use of stirred, small, inert grinding media. The first 1.1 MW IsaMill™ using inert media was commissioned at Mt Isa in 1994 and four 1.1 MW IsaMills™ became the enabling technology for the McArthur River project ...
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Comparing with the conventional grinding mills such as ball mills and tower mills, IsaMill can significantly reduce comminution circuit energy cost and grind mineral particles to as fine as 7 μm [2], [3]. As a result, it can be applied to base metal operations such as lead and zinc mines, and also for the liberation of gold particles from ...
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The grinding experiments were executed in two different types and sizes of mills to consider mill specific effects: One was the LM4 IsaMill TM from Netzsch, the other one the PM-1 from Drais. The LM4 has an internal deflector wheel and its volume is around 4.5 L. Six perforated discs have been used with a distance of 35 mm.
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the fine grind size, and produced finer product when it was operated at the same stress level of ... mill is then sent to the cleaning stage. Minerals 2023, 13, 315 4 of 16 ... The IsaMill tests ...
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In April, 2013 the Phu Kham Increased Recovery Project was commissioned to maximise performance by de-bottlenecking the plant IsaMill™ regrind and cleaning capacity.
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Table 2. The milling environment of HIGMill and IsaMill. HIGMill IsaMill Agitator configuration 10 castellated + 6 non-castellated 6 discs Specific gravity of grinding media 3.7 3.7 Bead size (mm) 3–4 2 Bead filling (%) 64 70 HIGMill survey was held at varied solids content and tip speed. IsaMill tests, on the
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The IsaMillTM is an energyefficient mineral industry grinding mill that was jointly developed in the 1990s by Mount Isa Mines Limited (MIM, a subsidiary of MIM Holdings Limited and now part of the Glencore Xstrata group of companies) and Netzsch Feinmahltechnik (Netzsch), a German manufacturer ... IsaMill. Updated on Nov 10, …
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