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The Gold Fields Granny Smith mine in Western Australia has been operating their grinding circuit under a wide range of conditions: campaigning very competent underground ore followed by soft oxide, primary versus secondary crushed feed and finally singlestage SAG and conventional SAG, ball mill and pebble crusher (SABC) configurations. Full ...

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HPGR test results published by Grier (1992) on gold ores from the Mt. Todd project showed significant energy savings for a HPGR/Ball Mill circuit as compared to a SAG/Ball Mill plant. By adding a Polycom highpressure grinding roll, the throughput of existing plants can be increased by as much as 150% while simultaneously reducing the power ...

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Autogenous AG SAG Mills for Sale 5 to 50 TPH SAG Mill Starting as small as 13 feet (4 m) in diameter on 330 HP and as large as 24′ ( m) in diameter on 3,300 HP, the 911MPE Semi Fully Autogenous Mills tumble crushed ore without iron or steel grinding media.

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The Huckleberry mine, located in British Columbia, produces roughly 40 million lb/y of copper. A comprehensive energy and cost study compared an existing SAG millbased circuit at the Huckleberry mine with two proposed circuits involving comminution technologies that are associated with energy efficiency: highpressure grinding rolls (HPGR) and highspeed stirred mills.

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Semiautogenous (SAG) mills are widely used grinding equipment, but some ore with critical particle sizes cannot be effectively processed by SAG mills and turned into pebbles. This research aims to analyze and compare the properties of raw ore and pebbles from a zinc and tinbearing ore. The results show that the contents of sphalerite, cassiterite, biotite, antigorite, pyroxferroite ...

PDF Dynamic Modeling and Simulation of SAG Mill Circuits with ... Chalmers

between the SAG mill and the pebble crusher in a closed circuit and thus to optimize the circuit efficiency by controlling the pebble crusher operational settings. In this thesis, two modeling techniques are proposed for simulating the dynamics in the grinding process. The first method is the fundamental modeling method, where the underlying

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Autogenous and SemiAutogenous Mills ScienceDirect

The Cadia Hill (Australia) wet SAG mill is m in diameter with a 20 MW motor and in 2004 was the largest diameter mill in operation in the world. ... These scats are crushed before returning to the SAG mill or passing onto a ball mill in an autogenous/ball mill/crusher (ABC) circuit (Figure, Figure ).

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CRITICAL HPGR PARAMETERS. HPGR roll diameters typically range from m to m, depending on the supplies, and roll widths vary from m to m. The aspect ratio of the rolls also varies as a function of manufacturer. Typical HPGR throughput rates range from 20 to 3,000 tph, with installed motor power as high as 3,000 kW per roll.

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Quantifying the energy efficiency of fine grinding circuits

In contrast, when the SSE75 was calculated, it showed the SAG mill consumed 20% less energy to produce final product material than the ball mill. Since the aim of a comminution circuit is to generate final product material, the SSE methodology gives a fairer indication of energy efficiency. Figure 1 Difference between P 80 and %75 µm for ...

PDF RECENT DEVELOPMENTS IN AG/SAG MILLING IN AUSTRALIA ResearchGate

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EXCEL™ cone crusher spare parts for AllisChalmers® / Svedala® Hydrocone crushers ... Whereas a SAG and ball mill may be ideal for larger operations, the Rod Mill is ideal for low tonnage applications. Product features. Durable, lowfootprint Rod Mills.

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