(PDF) Acoustic Emissions in M10000 IsaMill Monitoring
Consequently, the velocity of grinding media passing through the progressively ground mineral II ore feed slurry should be substantially larger than that through FIG 11 -IsaMill acoustic emission (AE) analyser grinding compartment AE power output for compartment 1 (ten second averaging) superimposed with total flow rate.
IsaMill Ultrafine Grinding for a Sulphide Leach Process
variable speed peristaltic pump from a feed tank to the IsaMill feed port. Slurry exited the mill through a separator located before the mill mechanical seal, which allowed slurry to pass but retained media within the mill. Ground slurry was discharged from the mill through a slurry discharge port and was collected in a sealed product tank.
Effect of media size and mechanical properties on milling efficiency
During comparison tests between ceramics A and C, the initial feed slurry P 80 was ≈130 ... Grinding of feed with ≈1000 μm top size in a M10,000 IsaMill™ will require ≈5.5 mm media of the highest density and ≈6.5 ...
Schematic of ISAMILL | Download Scientific Diagram
The grinding media density impacts the power draw and determines the maximum slurry density that can be fed into the stirred media milling chamber (Brissette 2010;Celep et al. 2011;Ellis 2003 ...
IsaMill Technology Used in Effecient Grinding Circuits
High intensity stirred milling is now an industry accepted method to efficiently grind fine and coarse particles. In particular, the IsaMillTM, which was invented for, and transformed the fine …
How it works
The IsaMill™ is a closed mill. Slurry travels through the mill in a 'plug' flow pattern through consecutive grinding discs. Media recirculates between the rotating discs distributing grinding action throughout the IsaMill™.
Flowsheet improvements for the real world
particles in the feed, causing breakage. The media is ceramic and avoids the passivation of particles common with metallic media, improving the product for fl otation and leaching. The IsaMill™ delivers an even blend of attrition and abrasion of particles throughout the mill. At the discharge end, slurry and media reach a patented
Horizontal layout
Slurry plug flow. Plug flow is characteristic of the horizontal IsaMill™ design which when combined with the IsaMill™'s short residence time and product separator results in a product size distribution that is always much sharper than the feed and considerably sharper than alternative technologies. Horizontal layout for simple mill access
IsaMill™
In short, IsaMill™ reduces the energy cost, media cost and capital cost of fine-grinding. The IsaMill™ is used extensively in base metals, PGM, gold processing and magnetite grinding applications. And the power capacity of an IsaMill™ ranges from 75kW to 3.8mW. IsaMill™ is the real-world specification of choice in: mainstream grinding
Significant Potential of an IsaMill in Secondary Grinding …
the market, this has been reflected through media suppliers investing in the development of larger rolled ceramic media (up to 24 mm) and equipment suppliers releasing large stirred-mill designs (up to 12.5 MW). When the IsaMill™ was first introduced to the market in the late 1990s, the target grind size was in
IsaMill
The IsaMill is an energy-efficient 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 of bead mills. [1] The IsaMill is primarily known for its ultrafine grinding …
Improving IsaMill™ energy efficiency through shaft spacer …
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 in 1995. ... For each stage of testwork, top-up grinding media was added by addition into the feed pump box to be pumped into the IsaMill™ with the feed slurry. Adding the ...
IsaMill™ uses horizontal milling to secure better energy …
particles in the feed, causing breakage. The media is ceramic and avoids the passivation of particles common with metallic media, improving the product for fl otation and leaching. The IsaMill™ delivers an even blend of attrition and abrasion of particles throughout the mill. At the discharge end, slurry and media reach a patented
COARSE GRINDING ON A ISAMILL?
Since ceramic media has the potential to be optimised further (sub 1-millimetre feed), it begs to question the efficiency gains that could be seen with ceramic media in secondary/tertiary grinding opportunities. In recent years, ceramic media suppliers now produce 3.7 S.G. media up to 16 millimetres. When GT last
Prediction of the disc wear in a model IsaMill and its effect …
The Isamill is a horizontal stirred media mill used for fine and ultrafine grinding of slurry transported rock particles. The charge motion is analysed using two different approaches, (1) a fluid only model, and (2) a 1-way coupled DEM + SPH model. The flow pattern when the classifier is closed is regular with a pair of oppositely oriented ...
IsaMill
high speed, small, circulating media. At the discharge end of the IsaMill™, slurry and media reach the patented product separator. Media is centrifuged out to the shell and is pumped back with …
IsaMill™ Design Improvements and Operational …
compression is generated towards the feed end of the IsaMillTM. Slurry feed into the mill counteracts this back pressure to provide a net positive flow through the mill. Conventional PI level control in the IsaMillTM feed tank cascades the change in feed tank level onto a flow rate set point for the feed pump. A reduction in
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gravity fed to a feed hopper. Grinding media is added via a screw-feeder to the feed hopper. The slurry in the feed hopper feeds the IsaMill. In normal operating conditions when using river sand media, the new feed throughput is about 10-10.5 t/h. The IsaMill operates with a power draw set point of 950 kilowatts (kW). Generally
IsaMill
The IsaMill significantly reduces the energy requirement, and media and capital costs of fine grinding. Just as importantly, the processing advantages of inert grinding greatly improve metallurgical performance compared with …
Fine grinding—Developments in ceramic media …
In cooperation with Xstrata Technology, the performance and cost effectiveness of the Keramax® - MT1TM grinding media has been tested and verified using laboratory, pilot and full-scale …
Stirred Mill Optimisation Am I Getting the Most Out of My
Power is the rate at which the IsaMill™ motor applies energy to the charge (slurry and media), measured in kW. Throughput, a function of circuit fresh feed flow rate (m 3 /h) and density (kg/m 3 ), is the rate at which the feed
Isa mill …
The key findings of the trial were IsaMill™ has reduced the feed from F80 of 130µm to 150µm to P80 of 60µm to 65µm Size reduction has been undertaken by finer media than used in the testwork Media consumption has …
A Blueprint for Getting Top Performance from …
Key areas covered by the paper include: how to survey an IsaMill correctly; optimize media selection and operating density; how to benchmark a mill to design; and typical strategies to minimize wear within the IsaMill.
sbm/sbm isamill grinding discs manufacturer.md at master
sbm / sbm isamill grinding discs manufacturer.md. maekesi a6025507b6 s. 16:58:18 +08:00. 28 KiB Raw ...
Computational prediction of performance for a full scale Isamill…
The Isamill is a horizontal stirred media mill used for fine and ultrafine grinding of slurry transported rock particles. The charge motion is analysed using two different approaches, (1) a fluid only model, and (2) a 1-way coupled DEM + SPH model. The flow pattern when the classifier is closed is regular with a pair of oppositely oriented vortices between each pair of grinding …
From sand to ceramics
The IsaMill TM Ceramic Media project is a key example of Mount Isa Mines' innovation in the industry. The project included the design and installation of an improved quick charging system, the new IsaCharger TM, together with new media recovery and slurry feed distribution systems.
The Influence of Media Size and Density on Stirred Mill …
media grinding test s. The mine uses the IsaMill to regrind rougher flotation product to a target P 80 of 25 µm for subsequent cleaning flotation. In total, 700 L of IsaMill feed slurry with 45 w/w% solid was received from the mine . The sample was oven-dried at low temperature and then split into representative subsamples for the grinding ...
Netzch mill results with different media sizes: …
Download scientific diagram | Netzch mill results with different media sizes: slurry feed F 80 $ 20 and 10.3 lm. from publication: Variables Affecting the Fine Grinding of Minerals Using Stirred ...
Use of temperature for diagnosing mixing in the IsaMill
The IsaMill can operate with pressures to a maximum of 450 KPa. A UG2 ore slurry of solids fraction 38% (w/w) at an F80 = 77 μm from a wet ball mill discharge was pumped to the IsaMill slurry feed tank which was well-mixed and monitored to ensure appropriate level of the slurry. A peristaltic pump was used to deliver the required slurry flow ...
A Blueprint for Getting Top Performance from Stirred Mills
According to a technical paper recently made available by Glencore Technology, the practice of optimizing media selection, understanding how density and viscosity impact an IsaMill's efficiency, and following simple troubleshooting guidelines outlined in the paper can serve as a dependable blueprint for auditing IsaMill performance in any application.