The temporary crusher was successful at increasing the throughput by 7% and based on the operating data, plans are currently being developed to install a permanent secondary crushing system in front of the SAG mill. This paper will review the results from the test crusher and the flow sheet for the permanent secondary crusher
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In this presentation an historical perspective of the origins of Mine-to-Mill is described and is followed by a discussion of how AG/SAG feed size affects throughput and specific energy and the factors that in turn influence AG/SAG feed size, such as ore hardness, Run of Mine (RoM) size distribution and crusher operation (both primary and secondary)
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This is the major reason why AG/SAG crushers are preferred for mine processing. Sample Heading Ball Mill Ball mills are used for single stage fine grinding, regrinding processes. After the crushing process a ball mill is one of the most important equipment used for secondary grinding. Size reduction is carried out through Impact of the balls
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Northern Star Resources Limited Jundee Gold Mine in Western Australia operates a comminution circuit that consists of a primary crusher, 3.85 MW semi-autogenous grinding (SAG) mill, 1.8 MW ball mill and pebble recycle crusher. In 2017, a secondary crushing circuit was installed to remove the SAG mill throughput bottleneck and increase production of highly competent underground ore from 1.35 to
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The mill’s SAG/ball/flotation circuit was initially designed for 35,000 mt/d. As mentioned earlier, a secondary crushing circuit had been installed to boost the mill tonnage rate to 40,000 mt/d. However, the increased circulating load led to overloading of the original 12 x 28-ft single-deck SAG mill
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SAG mill drives (as GMDs) by some operators and principal motor designers/manufacturers until the reasons for known problems in design or manufacturing were better understood and resolved. Accordingly, the latest 40 ft dia. SAG mill is rated at 29 MW and 78% C.S., with a 42 ft dia. mill built but not yet operational. The more recent option
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The mills were selected on the basis of two milling trains, each comprising the largest SAG and ball mills currently proven at other operations, at the time of design. On that basis, a 28 MW SAG mill (internal diameter of 12.19 m (40 ft)) and a 22 MW ball mill (8.53 m internal diameter (28 ft)) were selected for each milling train
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SAG mill. SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also use grinding balls like a ball mill. A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%. The largest SAG mill is 42' (12.8m) in diameter, powered by a
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Keywords: Integration, optimization, simulation, modelling, mine-to-mill, ore...1.86 Мб final consumers, such as iron and steel producers in the cases of iron ore and coal4.The second case study also demonstrates several advantages of using the Mini RFID tags rather than the normal size RFID tags in secondary crushing circuits
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May 15, 2014 SAG mills are primarily used at gold, copper and platinum mines with applications also in the lead, zinc, silver, alumina and nickel industries. The largest SAG mill is 42' in diameter, powered by a 28 MW (38,000 HP) motor AUTOGENOUS GRINDING MILL SAG . They are so-called due to the self-grinding of the ore
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Three Stage of Crushing an Alternative to SAG Circuits, Proc. 36th Annual Meeting of the Canadian Mineral Processors, Ottawa, Ontario, Canada, January 20-22, 2004
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Jan 01, 2005 PTFI uses 3.0 by 7.3-m (12 by 24 ft) vibrating screens to classify SAG discharge, employing two on the 10.4-m (34 ft) SAG mill circuit, and three on the 11.6-m (38 ft) SAG circuit. As most SAG circuits are now designed for the inclusion or subsequent addition of a pebble-crushing circuit, a design that incorporates screens allows maximum future
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AG/SAG Mill Liners From MGS Casting. At MGS Casting, we engineer innovative designs, tailored especially for every customer. Our AG/SAG mill liners are manufactured to the highest industry standard for Autogenous Grinding(AG), Semi-Autogenous Grinding(SAG), Primary / Secondary
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Jul 13, 2016 Use of HPGR eliminates tertiary crushing in a conventional grinding plant. In some cases, it may even eliminate the need for a secondary crushing stage. As an energy-saving alternative to the SAG mill, HPGR is particularly suited for the pregrinding of hard, highly siliceous gold ores
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Nov 28, 2012 Ausencos experts discuss the viability of secondary crushing in SAG mill circuits and provide advice for mines considering such a set-up
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Mar 12, 2013 Summary Ausenco’s experts discuss the viability of secondary crushing in SAG mill circuits and provide advice for mines considering such a set-up. Secondary crusher: secondary impact crusher or cone crusher
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Secondary crushing of the SAG mill feed, when implemented correctly, has been shown to significantly reduce SAG mill and total circuit specific energy. Very fine feed, good process control and or the presence of some coarse rock in the feed (partial secondary crushing) has been required to make a successful project
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SAG mill and the other goes to secondary c rushing. The crushing stream is screened on a double deck screen which has 100 mm apertures for the top deck and 30 mm for the bottom de ck
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Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW
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Dec 02, 2016 the SAG mill and ball mill was 8658 kW, which caused partial over-grinding. From experience in processing plants outside of China, the power rating of the ball mill should be higher than that of the SAG mill [5]. The pebble crusher had an over-powered configuration. The
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Like Schenck Process Beast SAG mill screens, the excitation force of the new SLD4397DXX ‘mega’ screen is delivered by four DF704 exciters mounted on 2 unitary beams. But unlike the Beast, the new screen’s drive assembly incorporates a unique twin gearbox arrangement driven via a single motor, ensuring effective exciter phasing
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Aug 06, 2015 The plus ” mill product was crushed in a cone crusher and returned to the mill feed along with the minus ” plus 4 or 6 mesh fraction. Tests were run with a short mill, inside length of 26-3/8″, or diameter-to-length ratio of 2.50 to 1. The same mill was then lengthened to 48-3/8″, diameter-to-length ratio of 1.36 to 1. Test Conditions
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