The patented IsaMill is a transformation in grinding technology based on high intensity stirred milling. The IsaMill was developed for fine grained orebodies that needed a step change in processing efficiency to be economic. The IsaMill significantly reduces the energy requirement, and media and capital costs of fine grinding.
Jul 18, 2019 Tests in an IsaMill processing pyrite concentrate for gold recovery showed they reduced the specific energy requirement by 12.7% to 21.5% depending on the P80 requirements. The greater the fine grinding duty the greater the savings recorded.
Jan 01, 2014 Therefore, the aim of this work is to extract the exact influence of pyrite content on the chalcopyrite recovery, grade, and selectivity after regrinding using an IsaMill with fully inert ceramic medium. Model mineral systems comprising of pyrite and chalcopyrite in different proportions (20–80 wt.%) are used for the study. Surface species ...
Jul 23, 2019 According to Glencore Technology, the spacers are designed to be used with its IsaMill range of grinding technology. They have shown significant energy reduction in pyrite …
coefficient as a new tool in characterising stirred milling grinding media. The first application of this ceramic media will be regrinding a gold bearing, pyrite rich sulphide flotation concentrate in the industry’s largest stirred mill; the M10,000 IsaMill. 1 INTRODUCTION The high energy efficiency of stirred mills
Jun 26, 2020 A Review Of The Effects Of Grinding Media And Chemical. Aug 01 2016 given that pyrite has the highest rest potential and thus it is the least electrochemically active sulfide mineral grinding with forged steel grinding media causes the significant galvanic interactions due to the large difference between the rest potential of pyrite and that of the forged steel grinding media see table 1 …
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Transforming Flowsheet Design with Inert Grinding - the IsaMill. ... The floatability of pyrite is dependent on the galvanic current between mild steel and pyrite during grinding because the ...
Harbort et al. (1998) reported the results of improvements in gold recoveries obtained with sample of pyrite ore after ultrafine grinding (IsaMill) as a method of liberating the physically locked...
Fine Grinding. 13. • Typical refractory gold IsaMill fine grind window 25-90 kWh/t to mill pyrite concentrates to P. 8010-12 m. 10 30 50 70 90 110 1 10 100 S p e c i f i c E n e r g y ( k W h / t ) Size(um) High -90 kWh/tonne Low - 25 kWh/tonne Mean -60 kWh/tonne. Fine Grinding.
Grinding should consume less energy when media types having low sliding friction coefficients are used. Figure 4 shows the resultant torque acting on the IsaMill shaft for the two different media types. The IsaMill took longer to reach steady state with the low s media but the stable torquewas 14,000 units compared to 21,000 torqueunits with
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™. Figure 2: IsaMill™ …
UFG of pyrite concentrates for subsequent leaching is used in ores, where refractoriness to direct cyanidation arises from fine to ultrafine ( 20, 0.02 μm) gold mineral inclusions in the pyrite and/or arsenopyrite. By grinding to 80% passing 10 mm a significant fraction of the colloidal size ( 0.5 μm) gold is also being exposed and rendered amenable to cyanidation.
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