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The mill operates 70–80% full of small (1.5–6mm) grinding media. The discs agitate this media to grind the feed slurry. The patented product separator retains media in the IsaMill™ by ˜rst centrifuging it and then pumping it back towards the feed end of the mill. Feed particles have to pass through consecutive grinding. Click Here
Use of temperature for diagnosing mixing in the IsaMill. Abstract This paper describes a methodology to monitor axial mixing in an IsaMill as a function of mill feed flow rate, mill tip speed and media load. Steady state temperature measurements (profiles) along the mill length were used to quantify the degree of mixing during the comminution ...
media types of similar size, shape factors and SG. In fact, grinding efficiency was better than could be predicted with stress intensity calculations. Of significance was the power trend that occurred during test work under the conditions of media-water and media-slurry. In all other media types ever tested by Xstrata Technology (including
The IsaMill usually consists of a series of eight disks mounted on a rotating shaft inside a cylindrical shell (see Figure 2). The mill is 70–80% filled with the grinding medium, and is operated under a pressure of 100 to 200 kilopascals. The disks contain slots to allow the ore slurry to pass from the feed end to the discharge end (see Figure 3).
Jun 15, 2019· Little radial movement of both media and slurry is observed in the bulk of the charge. The tangential (swirl) velocity of the charge (media and slurry) is low (0.3 m/s) at the mill wall and at all heights, and increases radially inwards with the highest swirl speeds found near the .
The ratio of the size to the number of the media and feed ore particles is important for the efficiency of grinding. The usual feed size of particles would normally be a ball mill product and lie between 300 and 500 μm. The product size is usually less than 20 μm. The feed slurry carries between 30 .
The high-speed discs fluidize the media and the slurry that is continuously fed into the feed port. A patented product separator keeps the media inside the mill, allowing only the product to exit. The grinding media can include granulated slag, river sand, ceramic beads or a sized portion of the ore itself.
IsaMill™, is installed in more than two-thirds of the world's metalliferrous ultrafine grinding applications. The grinding media size for the IsaMill™ is within the size range 1.5 – 3.5 mm. Media can come from various sources, such as an autogenous media screened from the feed .
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 [.]
Grinding media are loaded into an IsaMill™ intermittently . ... feed slurry should be substantially larger than that through ... the manufacturer did not know the relationship between filling up ...
The feed slurry enters through a feed spout in the top cover which directs the feed into the bottom of the vortex (bottom of the mill) without any inlet head. Grinding media is added either by the automatic Media Addition System through one of the unused feed ports, or manually through the media feed chute.
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FEED SLURRY WITH MEDIA Grinding Discs SHELL SLIDES AWAY FOR MAINTENANCE Motor DISCHARGE Gearbox Shaft Bearings Product Separator FEED SLURRY WITH MEDIA Shell Typical Configurations : • M10000 - 2.6-3.0 MW motor • M3000 - 1.1-1.5 MW motor • M1000 – 355-500 kW motor Inside shell are rotating grinding discs mounted on shaft which is ...
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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 some of the slurry to the feed end of the mill. This action retains media in the IsaMill™ without the need for fine screens while the ground discharge slurry exits the centre of the ...
media-water and media-slurry. In all other media types ever tested by Xstrata Technology (including ceramics), an IsaMill will draw more power when operating with a media-water system than with a media-slurry system (i.e. motor power would always decrease when slurry was introduced to a mill operating with grinding media and
The net flow of slurry in the IsaMill is plug flow with superimposed axial mixing. Abstract. This paper describes a methodology to monitor axial mixing in an IsaMill as a function of mill feed flow rate, mill tip speed and media load. Steady state temperature measurements (profiles) along the mill length were used to quantify the degree of ...
Vertimill® is a unique product offered exclusively by . Grind efficiency, reduced media consumption, lower installation cost, minimal maintenance, and minimal liner wear make Vertimill® the lowest total cost of ownership in many applications, substantially improving .
impossible. There is a very high probability of media-particle collision as a result of the high energy intensity and the 8 chambers in series. Media The key to the efficiency of the IsaMill™ is the ability to use fine media. While tower mills are typically limited to 10-12mm fresh media sizing, the IsaMill™ can use media as small as 1mm. This
and slurry out of the gland area. The IsaMill™ discs reach a tip speed of 19–22m/s depending on the application. The mill operates 70–80% full of small (1.5–6mm) grinding media. The discs agitate this media to grind the feed slurry. The patented product separator retains media in the IsaMill™ by ˜rst centrifuging it and then pumping ...
The IsaMill™ can be scaled up directly from small scale laboratory tests. Glencore Technology will provide the IsaMill™ as a packaged Grinding Plant, consisting of the mill, slurry feed and discharge systems, media handling system, all instrumentation and control and all structural steel and platforms.
IsaMill (1.5–6mm) grinding media. The discs agitate this media to grind the feed slurry. The patented product separator retains media in the IsaMill™ by ˜rst centrifuging it and then pumping it back towards the feed end of the mill. Chat Online »
IsaMill™ test procedures use the same continuous feed and classification as full scale, and specifically confirm that steady state has been reached. The media size and type: For any given ore, grinding energy efficiency is determined primarily by media size and type. Glencore Technology's procedures use the same size media as the full scale ...
Maintenance of the IsaMill™ is as simple as routine maintenance for a slurry pump. The internal rotating shaft is counter-levered at the feed inlet end so the discharge end flange and grinding chamber can be simply unbolted and slid off (using hydraulic rams). The grinding discs can be removed by undoing the locking nuts at the end of the shaft.
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