Many large mills around the world (Esperanza with a 12.8 m mill. Cadia and Collahuasi with 12.2-m mills, and Antamina. Escondida # IV. PT Freeport Indonesia, and others with 11.6-m mills) have installed SAG .
The key operating parameters identified as being critical to achieving design processing rates of the Cadia Hill SAG mill circuit and that could be easily manipulated were; (Dunne et al 2001 ...
A number of different safeguarding methods may be necessary to adequately protect the operator as well as other workers nearby. For example, you will need to consider the machine size, operating speed, size and type of material, length of production runs, required accuracy of the work, methods for material feeding and removal, operator controls ...
Jan 01, 2016· Some dry autogenous mills operating in Canada are 8.5 m in diameter and 1.5 m in length. These are known as Aerofall mills. The Cadia Hill (Australia) wet SAG mill is 12.2 m in diameter with a 20 MW motor and in 2004 was the largest diameter mill in operation in the world.
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In June 1998, the world's largest grinding mill, the 40 ft (12.2 m) diameter 20 MW Cadia gearless SAG mill, was commissioned. This was a leap of over 40% above the largest operating SAG mill. A significant saving in capital cost gave the incentive necessary for a single mill line at Cadia, resulting in the selection of the 40 ft (12.2 m ...
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By combining with SAG discharge and screening on the SAG discharge screens, top-size control to the ball-mill circuit feed is maintained while still unloading the SAG circuit (Mosher et al, 2006). A variant of this method is to direct pebble-crushing circuit product to the ball-mill sump for secondary milling; while convenient, this has the ...
Comparison between maximum mill throughput and SAG mill feed size observed from blast #760043 and simulated for blast designs 1 and 2 are shown in Table 4. Table 4.
The grinding mill control system was switched to Simatic S7 and the control system to Simatic PCS 7. The modernization also saw the installation of new air gap and speed sensors as well as an access interface for remote plant diagnostics.
The grinding mill control system was switched to Simatic S7 and the control system to Simatic PCS 7. The modernization also saw the installation of new air gap and speed sensors as well as an access interface for remote plant diagnostics.
The SAG mill was designed to treat 2,065 t h −1 of ore at a ball charge of 8% volume, total filling of 25% volume, and an operating mill speed of 74% of critical. The mill is fitted with 80 mm grates with total grate open area of 7.66 m 2 ( Hart et al., 2001 ).
Cadia Hill SAG milling circuit reported pebble recycle of 34% of feed (Hart et al., 2001). Hence there is a high likelihood that the average rate of supply of pebbles will be sufficient to sustain ...
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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The evolution of the Cadia 40-foot SAG mill to treat the Cadia East orebody: a case study of incremental change leading to operational stability T. Waters, A. Rice, J. Seppelt, J. Bubnich, B. Akerstrom 14th AusIMM Mill Operators' Conference 2018, 29-31 August, Brisbane ABSTRACT The Concentrator 1 plant at Cadia transitioned from Cadia Hill open ...
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For instance, with a nominal air gap of 16-17 mm for large SAG mills, the ABB design allows for considerable eccentricity. The gap is monitored by nine noncontact, capacitive sensors located inside the stator, which also inform the operator of air-gap status at standstill.
optimisation of the cadia hill sag mill circuit abstract ... - Ш Maximising Pebble Recycle Load and Crusher Interaction With the. SAG Mill. I- 12 ..... The crushers have a capacity of approximately 400tph each at a gap setting of .... system was installed in the Cadia Hill SAG mill circuit in June 1999 to.
During 1998 the worlds larges t SAG mill and two of the w orld's largest ball mills were commissioned a t Newcrest Mining's Cadia Mines property in New South Wales, Australia.