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Trommel''s Dimension Slot Size ... Pulp Lifters and Cone Discharge of SAG Mills • Size of SAG Grate: 64 mm • The short directors is near to medium directors • Strangulation of 95 mm 697 mm 307 mm 674 mm 350 mm Cone discharge of SAG 1011 95 mm 298 .
The initial design of the grate section caused a serious accumulation of pebbles within the SAG mill which contributed to a decreased grinding efficiency. The grates were designed with 18 inner sections, with a 25 mm grate slot width, and 18 outer sections, with only four sections having pebble ports (slot width of 60 mm).
The software uses the particular power model (Bond/Barratt, Morrell Mi, etc.) to determine what is the transfer size where the ratio of E SAG to E ball matches the ratio of mill power (1: in this example). This is the ''maximum efficiency'' transfer size where the mills will both operate at full power.
SLURRY POOLING AND TRANSPO RT ISSUES IN SAG MILLS ... representative of the whole grate. [slot] all slots mill ... This effect can also be observed when the feed to a mill changes in size
Overflow Versus Grate Discharge Ball Mills: An Experimental Investigation It has been widely accepted to go for grate discharge ball milling when a coarse product is preferred or to avoid production of extreme fines, but overflow discharge mills are preferred .
Jan 08, 2016· In this training module, we''ll cover the workings of a semiautogenous grinding mill, or SAG mill, that''s designed to be the first stage of a grinding circuit. Ore that''s crushed in a primary ...
Many grates in operation are pegged by grinding media to varying degrees of severity. This paper introduces a comprehensive, accurate and rapid method to measure and track the size and pegging status of each and all grate holes in situ, and therefore provides tracking information on the Open Area of a SAG mill.
design is customised to suit your mill size, application and operating conditions. The Vortex design can be fully retrofitted into an existing mill or supplied for new mills. The Bradken Vortex Discharge System: • Provides superior discharge performance for SAG and AG mills • Is ideally suited to high throughput, high solids discharge mills
The mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a rod mill, ball mill or pebble mill. AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill.
Turbo Pulp Lifter (TPLTM) An Efficient Discharger to Improve SAG Mill Performance Sanjeeva Latchireddi Chief Process Engineer Outokumpu Technology Inc. Centennial Co 80112, USA Phone +1 303 792 3110 x224 Fax +1 303 799 6892 Email: Key Words: SAG, Grate, Pulp lifter, pebbles, flowback, carryover
McNICHOLS ® Plank Grating, Interlocking Plank, GRATELOCK ®, Galvanized Steel, ASTM A653, Mill Finish, 14 Gauge (.0785" Thick), RoundEnd Slot (12" Width), 3" Channel Depth, Two Male Channel Flanges, Male Channel Flange Profiles Interlock with Adjacent Channel Flange Profiles, SlipResistant Surface, Long way of Opening (LWO) Parallel to Width of Interlocking Plank, Slots Sheared ...
of grate/pulp lifter design in AG/SAG mill discharge. The current understanding from literature lacks knowledge of mill content size distribution and its effect on discharge through the grate at various aperture sizes and radial positions. It also indicates that in order to advance the understanding in a meaningful way, a more mechanistic ...
Apr 14, 2016· In 2010 Codelco El Teniente''s problems with grate piece breakage in their SAG mill resulted in low mill availability and operational instability. Codelco El Teniente worked in close cooperation with to solve the problem. As a result, the next level of PolyMet discharge grates were taken into use in a SAG mill for the first time.
The load in such a mill typically contains 250,000450,000 particles larger than 6 mm, allowing correct representation of more than 90% of the charge in Discrete Element Method (DEM) simulations. Most AG/SAG mills use discharge grate slots which are 15 mm or more in width. The mass in each size fraction usually decreases rapidly below grate size.
The discharge end of the Grate Discharge Ball Mill has at least ten times the discharge opening area, through the grate slots, compared to the common trunnion overflow type mill. The discharge grates are designed to run clean and free of any blinding or choking. The pulp level in the mill may be varied by merely changing the pulp dilution.
The rubber grates have tapered slots to minimize the plugging with near size particles. Rubber / PolyStl™ grates are extensively used in AG / SAG and Primary ball mills. Polycorp regularly supplies rubber and PolyStl™ grates for mills up to 40 ft in diameter. PolyStl™ Grates. PolyStl™ Grates are suitable for AG / SAG mill applications ...
Discharge grates are designed to retain oversize material and balls in the mill, while allowing slurry and pebbles to move on. In 2015, El Teniente claimed record commercial production of more than 71,000 tons of fine copper at one of the industry''s lowest cost levels. An increase in slot size and operational stability increased throughput by 7%.
description of the holdup and mass transport in grate discharge AG/SAG mills and the slurry discharge mechanism is still not well ... function of grate configuration. Slot size, position, and ...
The load in such a mill typically contains 250,000–450,000 particles larger than 6 mm, allowing correct representation of more than 90% of the charge in Discrete Element Method (DEM) simulations. Most AG/SAG mills use discharge grate slots which are 15 mm or more in width. The mass in each size fraction usually decreases rapidly below grate size.
Outokumpu Technology''s new design, TPLTM is a result of these material transport problems. As the internal design of the TPLTM approximates a grate, peripheral discharge or a grate, openended discharge, it keeps the slurry/pebbles away from the grate once they enter the pulp lifter chamber, thus completely eliminating flowback and carryover problems.
SINGLE STAGE SAG/AG MILLING DESIGN Brian Putland 1, Fred Kock Leigh Siddall1 ... xLoad stability with large rock size and a small mill volume. xPebble extraction rates and discharge designs in the pilot mills. ... first based on the required slurry flow with typical grate and pulp lifter performance and the Effective Grinding Length. 1.
Sep 06, 2017· Mill lining optimization increases wear life by 36% at TISCO. Special ore properties have made it very difficult for TISCO Yuanjiacun Iron Mine to find a mill lining that lasts. ''s optimized metallic mill lining solution puts an end to years of application testing. Nevertheless, is continuing to improve the solution even further.
Our grates are made of our special H79 highstrength steel which is tougher and harder than commonly used chromemoly steels. Our grates made of H79 experience very little slot peening so mill throughput is not compromised. Proven high volume vendor Columbia Steel can provide all the castings required for a complete grinding mill reline.
grates opening in sag mill,grates opening in sag mill grate slot size liner design,with the advent of large diameter sag mills,the mill technology hammer . Contact Us ball mill grate discharge . for ball and SAG mill applications, Ball mill grates limitation on the smallest ball size is the discharge grate slot .
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