optimising a sag mill

MINE TO MILL OPTMISATION AT PADDINGTON GOLD OPERATIONS

SAG mill (3.8 MW) and a 15 ft. diameter ball mill (3.5 MW). Cyclone overflow (O/F) is sent downstream for gold leaching. Following sampling, the SAG mill was crash stopped and the total load measured. The SAG mill ball load was also measured following a

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Calibre Mill Optimisation Case Study | Mill (Grinding) | …

Presentation to The Mill Optimisation Summit 2011 Optimising SAG mill throughput: A case study in tuning Presented by: Paul Wilson Technology Manager Calibre Automation, Communications & Technology Group Two SAG mills The mills Porgera Mine, PNG 4.5 Megawatt, variable speed drive About 500 tonnes per hour per mill Highly variable lithology with grinding factors from 6 to 18 kilowatt …

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Comparing metal cap and steel lining systems in Philsaga …

Comparing metal cap and steel lining systems in Philsaga Mining Corporation’s SAG Mill Our white paper showcases how composite mill linings improved gold recovery by 2%, increased SAG mill throughput by 20% and improved service life by 40% at Philsaga.

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OPTIMISATION AND CONTINUOUS IMPROVEMENT OF …

2007, Process Technology and Innovation (PTI) was contracted to increase SAG mill throughput by integrating and optimising blast fragmentation, crushing and grinding for the harder M4/M4A (CuZn) ores. Following the implementation of recommendations

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THE EYES HAVE IT: IMPROVING MILL AVAILABILITY THROUGH …

optimising benefits of a fixed "security" camera, we designed a MCU which provides a live video feed from inside a running or stationary SAG mill. The first successful installation of …

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The Selection and Design of Mill Liners

Mines (WA) 36ft SAG mill the number of Outer Head Liners was reduced from 36 to 18 pieces and in doing so reduced the time to replace them by 9 hours at a cost downtime saving of about U$25,000 per hour. In this case the liners sections are 3.5 t each. For ...

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Increase throughput and capacity in SAG mills

 · The mill discharge from these mills consists of slurry, which goes to the ball mills for further grinding, and coarse pebbles/rocks, which are crushed and sent back to the mill. To maximize the capacity of these circuits, the general practice is to use grates with pebble ports (reaching 100 mm) instead of normal grate openings to increase the pebble removal.

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Applying grindcurves to mill operation and optimisation

 · This is a 7.81 m internal diameter, by 4.35 m internal length variable speed SAG mill, with a ball filling of 7.9%, operating in open circuit, feeding a ball mill. These were conducted through a combination of full surveys with associated crash stops, and snapshot surveys.

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(PDF) Maximising SAG mill throughput at Porgera gold …

Maximising SAG mill throughput at Porgera gold mine by optimising blast fragmentation

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How HPGRs compare to conventional milling

Whether you’re designing a brand-new mill circuit or optimising an existing site for long-term efficiency, High Pressure Grinding Rolls offer a range of advantages over conventional milling techniques, including ball mills, SAG mills and rod mills.

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mill optimisation system

2018/3/13Stopping mill equipment is not a desirable alternative, so the best way to resolve SAG mill challenges is to use simulation technology for equipment design alterations. Replacing the SAG's worn-out liner can occur every six to nine months and cost between $30,000 U.S. and $200,000 U.S. per hour, and each repair takes between 40 hours and 120 hours.

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SAGwise™ total process control The key to efficient SAG mill …

The SAG mill optimisation challenge Running a SAG mill more efficiently – without added expense – is challenging for a number of reasons. SAG mill liners are not only costly, but are also large castings with typical lead times of two to five months. Installing new

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An economic approach to optimising mill reline frequency …

The SAG mill at Rasp Mine has undergone a number of liner design modifications since commissioning in 2012, making liner wear and failure difficult to predict from historical data. During 2017, several instances of liner failure or near failure were experienced resulting in unplanned downtime for emergency relines or to patch liners in the lead up to a planned shutdown.

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factors affecting the performance of the sag mill

Choosing a SAG Mill to Achieve Design Performance Starkey . effects of grinding media shapes on ball mill performance. Factors affecting breakage rate. Considering tumbling ball milling the variation of fraction of mill filled with balls and powder, mill diameter, mill speed, media size and shape, ball density, ore type, and feed

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UNDErsTaNDINg MINE TO MILL

Understanding Mine to Mill is presented in five parts. Part A – Setting the Scene provides some definitions of Mine to Mill (M2M) and the historical background. A chronology of Mine to Mill developments is followed by brief descriptions of the very wide range of

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