The design of the 40-foot diameter SAG mill installed at the Cadia Gold Mine, New South Wales Australia, followed after two years of extensive laboratory and pilot plant testwork. This showed the Cadia ores to be hard and competent necessitating the use of both a variable speed mill drive and pebble crushing. The grinding power requirements were …
TECHNOLOGY Cadia SAG mill back in operation. Following repairs and a period of operational testing, the concentrator 1 semi-autogenous grinding (SAG) mill at Newcrest Mining's Cadia gold operation in New South …
Ø SAG mill availability was lower than expected in the first year due to issues with the gearless drive and trommel panel failures. Figure 1 shows the ramp up of the Cadia Hill SAG mill by quarter.
Increasing the size of the mills, however, meant that Cadia would need to use mills of unproven design {40 ft x 20 ft (12.2 m x 6.1 m) SAG mill and 22 ft x 33.5 ft (6.7 m x 10.2 m) ball mills}. There was considerable …
The 40-foot (ft) semi-autogenous grinding (SAG) mill at Newcrest's Cadia Valley …
The simulation model on which the Cadia Hill SAG mill was based on surveyed data from two pilot SAG (12% balls) run with recycle crushing. These were part of the second of two pilot campaigns and ...
The SAG mill operated to 97% of installed motorpower, for an annual throughput of 22.5 …
The design of the 12m diameter SAG mill installed at the Cadia Hill Mine in New South Wales followed after two years of extensive laboratory and pilot plant testwork. The testwork showed the Cadia ...
This paper examines the operation of the 40' SAG mill in its new configuration in the …
Optimisation of the Cadia Hill SAG mill circuit. S. Hart W. Valery B. Clements M. Reed M. Song R. Dunne. Engineering, Geology. 2001; Commissioning of the Cadia Hill SAG mill Circuit followed a project Research and Development exercise in July 1998. The SAG mill quickly reached 90% of the design rate but it became evident that the …
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 ... This was applied to Cadia Hill Gold Mine through evaluation of their existing wear profile
A SAG (Semi-Autogenous Grinding) mill is a giant rotating cylinder filled with grinding media and the ore being reduced. As the mill rotates, the grinding media lifts and the impact crushes the feed material. SAG mill control refers to the practice of managing the mill load, which is the amount of material inside the mill at any given time.
The Cadia Hill deposit was mined out in 2012 and the open pit is currently being used for tailings backfill. The Cadia Hill deposit was about 900 m long. ... (HPGR) unit treating screen undersize prior to the SAG mill; • Primary open circuit milling in a single 40-ft SAG mill fitted with a 20 MW motor. The motor will be upgraded to 22 MW.
In December 2019, Cadia Holdings received approval from the New South Wales Department of Planning and Environment (NSW DPE) to fully utilise the decommissioned Cadia Hill mine pit for deposition of dewatered tailings. Now the pit has been used for tailings storage as a mined-out Cadia Hill open pit TSF.
The evolution of the Cadia 40' SAG mill to treat the Cadia East orebody – a case study of incremental change leading to operational stability Watch . Glencore Mount Isa lead zinc flotation circuit – experiences from the implementation of model predictive control Watch .
The Cadia Mine again leads process design with the first truly hybrid HPGR-SAG circuit upgrading the circuit that had the world's first forty foot SAG Mill. The hybrid approach addresses the risk of shifting to block cave with higher throughput, of higher competence, and uncertain ROM size but expected depletion of fines. During commissioning, …
1.. IntroductionIt is generally recognised that the most accurate means for predicting the specific energy of an autogenous (AG)/semi-autogenous (SAG) mill circuit is to pilot the circuit using a 6 ′ × 2 ′ mill (Mosher and Bigg, 2001).However, one of the major drawbacks of this approach is that a relatively large sample is required to do so.
The remedial design of the stator of the gearless mill drive (GMD) of the 40 ft SAG mill at Cadia Hill was the project that defined the success of EAnD and the careers of its two engineering managers, Bill Lai and Chris Meimaris. ... What is worse though is that we can definitely say with hindsight that there was no bullet to dodge at Cadia ...
A rock breakage test has been developed that can help predict autogenous (AG) and semi-autogenous (SAG) mill performance in situations where only limited quantities of rock samples are available. The test was originally developed to make use of quartered (slivered) core but whole core, half core and lump material can also be used. …
Andacollo throughput during ramp-up. Reproduced from Gonzalez (2010). Mt Milligan Mt Milligan (Mills et al., 2009) has a low grade (0.20% Cu and 0.39 g/t Au) and competent ore.
SAG mill throughput maximisation stands as a critical priority, given its profound financial outcomes. However, achieving this goal is a complex task, as numerous factors impact mill throughput. ... for the Cadia Hill SAG mill circuit, throughput increased by increasing the SAG mill ball charge, reducing the number of lifter rows, reducing the ...
• Cadia SAG mill data (Key drivers of wear life) – Ore composition – Volume / mass of steel – Hypothesis –'Liner shape defines the wear rate profile and the resulting life of liners' et al –Applying mill control to account for liner wear on the Cadia 40ft mill, SAG 2015
Hart et al (2001) reported a range of strategies for SAG mill capacity debottlenecking and improving overall performance of Cadia Hill comminution circuit -one of which strategies was Mine-to-Mill ...
1605Huckleberry SAG feed 2012 Huckleberry 18 2.76 31.1 1606Huckleberry HPGR productHuckleberry 15.4 1607Cadia Hill Cadia 17.5 20 30 35 0.33 1608Ridgeway Cadia 18.7 21 30 42 0.43 1609Cadia East Cadia 20.3 29 30 29.7 0.2 164353392-2 Çöpler 13 2.58 84.6 76.7 0.26 3
Our study found that four operating states explain most of the distinct operating states of a SAG mill, where SAG mill power and …
The design of the 40-foot diameter SAG mill installed at the Cadia Gold Mine, New …
Optimisation of the Cadia Hill SAG mill circuit. Conference Paper. Full-text available. Sep 2001; S. Hart; Walter Valery; B. Clements; R. Dunne; View. Tower fine milling experience at Mount Isa Mines.
SAG mill liner development draws primarily on practical experience from SAG milling operations supported by computer-based modeling of charge motion in SAG mills and on established good design practice. Liner design needs to respond to the process aspects of mill liner action that are critical to good SAG mill performance, i.e., …
Commissioning of the Cadia Hill SAG mill Circuit followed a project Research and Development exercise in July 1998. The SAG mill quickly reached 90% of the design rate but it became evident that the … Expand. 24. PDF. Save. Predicting charge motion, power draw, segregation and wear in ball mills using discrete element methods.
The design of the 12m diameter SAG mill installed at the Cadia Hill Mine in New South Wales followed after two years of extensive laboratory and pilot plant testwork. The testwork showed the Cadia ores to be hard and competent necessitating the use of both a variable speed SAG mill drive and pebble crushing.
AG and SAG mills are now the primary unit operation for the majority of large grinding circuits, and form the basis for a variety of circuit configurations. ... Cadia and Collahuasi with 12.2-m mills, and Antamina. ndida # IV. PT Freeport Indonesia, and others with 11.6-m mills) have installed SAG mills of 20 MW. Gearless drives (wrap ...