-
(PDF) THE CADIA HPGR-SAG CIRCUIT – FROM DESIGN TO ...
Cadia in New South Wales has followed the pre-crushing circuit with a large HPGR to further reduce the SAG mill feed size as part of the Cadia East block cave expansion …
Nhận giá -
Cadia sees mill breakdown
2015-10-22 · Newcrest''s Cadia mine''s SAG mill has been shut down following motor issues. On Saturday a problem was detected with the motor on concentrator 1 SAG mill, Newcrest said in a …
Nhận giá -
SAG Mills Archives
2021-10-18 · SAG Mill Grinding Circuit Design. 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. SAG circuits are common in the industry based on: High single-line capacities (leading to capital efficiency) The ability to mill …
Nhận giá -
SAG Mill Grinding Circuit Design
2016-6-6 · 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 mills of 20 MW. Gearless drives (wrap-around motors) are typically used for large mills, with mills …
Nhận giá -
The Siemens 42ft gearless mill drive, still an ...
2021-10-19 · mill The result is the design of a Gearless Mill Drive motor for a 42ft Grinding Mill providing up to 35MW of power. Evolution is still the main GMD design philosophy, but realistic and proven computer models help to look beyond experience, where testing is impossible. The Siemens 42ft gearless mill drive, still an evolutionary design approach?
Nhận giá -
Ø Effect of SAG Mill Feed Size Distribution and Ore ...
2021-1-12 · Ø Recycle crusher availability was lower than that of the SAG mill. 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. Throughput and availability are presented compared to the target or design basis.
Nhận giá -
The evolution of the Cadia 40'' SAG mill to treat the Cadia ...
2018-8-29 · 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 .
Nhận giá -
how the ore is processed in the ball mill in cadia gold ...
At the Cadia Valley Operations, Newcrest operates two underground mines and one open pit mine. Ore isprocessed to a heavily auriferous copper concentrate in a crushing,grinding and flotation circuit. This two-stage grinding circuit consists of a40 ft SAG mill with a 20 MW Siemens gearless drive and two parallel 10 MW gear driven ball mills.
Nhận giá -
191015 Market Release Stage 1 of Cadia Expansion …
2021-10-4 · replacement of the Concentrator 1 SAG mill motor is planned to occur in the second half of FY21. Summary of estimated financial outcomes from both stages1,2,3 • Expected Net Present Value (NPV) of $ 1,170m (real) • Internal Rate of Return (IRR) of 21.5% • Payback 7.6 years Key improvements over the 2018 Pre-Feasibility Study (PFS)1, 2,3
Nhận giá -
Siemens modernises SAG mill gearless drive in Cadia …
2012-3-27 · At the Cadia Valley Operations, Newcrest operates two underground mines and one open pit mine. Ore is processed to a heavily auriferous copper concentrate in a crushing, grinding and flotation circuit. This two-stage grinding circuit consists of a 40 ft SAG mill with a 20 MW Siemens gearless drive and two parallel 10 MW gear driven ball mills.
Nhận giá -
Cadia Valley Operations
Cadia Valley Newcrest noticed 2 stator coils on their 20Mw Siemens SAG Mill were vibrating during operation during a routine inspection. The mill was immediately shut down and Australian Winders promptly sent a winding specialist to site to inspect and give technical advice in con junction with Siemens to ascertain the best course of action.
Nhận giá -
Cadia GMD Stator: Observed Behaviour and Modelling
2014-10-2 · The Cadia SAG mill diameter is 40 ft and the ring motor that drives the mill is rated at 20 MW. In 1998 when the mill and motor were commissioned both were the largest machines of their type in the world. The stator exhibited vibration excursions that appeared to be related to the mill speed. We determined the mode shape of the vibration using ...
Nhận giá -
Ridgeway Gold and Copper Mine, New South Wales
2021-10-6 · A two-stage grinding process forms a part of the comminution circuit. The grinding circuit comprises a 6.5MW SAG mill and 6.5MW ball mill. Using similar processes to the adjacent Cadia Hill concentrator, gold and copper are recovered in a …
Nhận giá -
(PDF) THE CADIA HPGR-SAG CIRCUIT – FROM DESIGN TO ...
Cadia in New South Wales has followed the pre-crushing circuit with a large HPGR to further reduce the SAG mill feed size as part of the Cadia East block cave expansion (Engelhardt, 2015).These ...
Nhận giá -
On the comparison between measured and calculated …
2011-11-1 · The Cadia SAG mill is 40 ft in diameter and the shell of the mill is 22 ft long between flanges. Strain gauges were applied to the Cadia mill at the locations shown in Fig. 2. The gauges were placed in similar locations to those on the Telfer mill but the feed end head gauges were omitted due to access restrictions during relining of the mill.
Nhận giá -
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 smaller mills the liners have to be handled and installed manually, so smaller blocks with
Nhận giá -
Literature Review: Gearless Motor Failures – A Mill ...
2014-9-10 · The Collahuasi motor was for a 40 ft SAG mill. The Antamina 38 ft SAG mill was also driven by an ABB motor and the hanger plates had not failed on that machine after several years of operation. Similarly, the Sossego motor for the 38 ft SAG mill had not failed. It too had an ABB motor and it had operated longer than the Collahuasi motor.
Nhận giá -
SAG Mill Liner Selection to Maximise Productivity
2021-8-13 · • 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'' Bird et al –Applying mill control to account for liner wear on the Cadia 40ft mill, SAG 2015
Nhận giá -
(PDF) Optimisation of the Cadia Hill SAG mill circuit
Most hard rock operations have reported pebble recycles above 10% of SAG mill feed (Powell et al. (2006). Cadia Hill SAG milling circuit reported pebble recycle of 34% of …
Nhận giá -
ARE SAG MILLS LOSING MARKET CONFIDENCE?
2021-8-13 · AG/SAG mill based circuits and this has impacted on the ability of companies to obtain funding. Bailey et al. (2009) published guidelines on the use of typical SAG mill-based circuit design methods, with particular focus on the use (and misuse) of JKSimMet. A follow up paper by Lane et al. in
Nhận giá -
Major Mines & Projects | Cadia Valley Operation ( Cadia ...
Oversize pebbles from the SAG mill are returned to the distribution bin; • Secondary milling in three ball mills, with the two original mills fitted with 8.7 MW motors, and a more recently installed third ball mill with a 16 MW motor. The mills are in closed circuit with cyclone classification for a …
Nhận giá -
The engineering and process effects of choosing a motor ...
2021-8-18 · The SAG mill power draw model of Austin (using the cali-bration by Doll, 2013) is used to predict the process power draw at the mill shell, Pshell, and the efficiency losses for the drive''s mechanical components based on Doll (2012) are used to determine the motor output power, P. The effect of varying the mill speed as a fraction of the critical
Nhận giá -
Cadia mine''s mill back in action
2015-11-25 · Cadia mine''s Concentrator 1 SAG mill is back in operation after a breakdown last month involving a motor. According to a statement from Newcrest Mining, the issue has been rectified with repairs made and a period of operational testing undertaken. "Engineers have determined that the mill motor will eventually require a full rewind.
Nhận giá -
AMIT 135: Lesson 6 Grinding Circuit – Mining Mill …
SAG Mill Circuit Example — Gold Processing SAG mill circuit example for gold processing [image: (135-6-3)] AG/SAG Mill. AG/SAG mills are normally used to grind run-off-mine ore or primary crusher product. Wet grinding in an AG/SAG mill is accomplished in a slurry of 50 to 80 percent solids. 2D and 3D simulations of particles in a SAG Mill
Nhận giá -
The evolution of the Cadia 40-foot SAG mill to treat the ...
2021-10-22 · 14th AusIMM Mill Operators'' Conference 2018, 29-31 August, Brisbane. ABSTRACT. The Concentrator 1 plant at Cadia transitioned from Cadia Hill open pit to the Cadia East block cave ore body in 2013. As a result of this change, major plant upgrades were required to achieve the desired throughput while treating more competent ore.
Nhận giá -
The evolution of the Cadia 40-foot SAG mill to treat the ...
The Concentrator 1 plant at Cadia transitioned from Cadia Hill open pit to the Cadia East block cave ore body in 2013. As a result of this change, major plant upgrades were required to achieve the desired throughput while treating more competent ore. The 40-foot (40'') SAG mill now receives a feed of predominantly high pressure grinding rolls (HPGR) product with a minor component of secondary ...
Nhận giá -
Cadia record pushes Newcrest above 2Moz
2021-7-22 · Cadia produced 96,042 tonnes of copper for the 2021 financial year against a guidance of 95,000 to 105,000 tonnes. Newcrest stated its SAG mill motor at Cadia commenced in early July and expected ...
Nhận giá -
Cadia SAG mill back in operation
2015-11-23 · 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 Wales, Australia, is now operating at full capacity SAG and ball mills at Newcrest''s Cadia gold operation ...
Nhận giá -
Design of the 40 foot SAG Mill Installed at the Cadia …
20MW). Selection of SAG mill dimensions and operating parameters is a complex problem and suffice it to say here that it is advisable in the design to provide operating flexibility to increase power demand. Design parameters chosen for the Cadia SAG mill are shown the following table. Table 2 : Cadia SAG Mill Design Parameters
Nhận giá -
SAG Milling in Australia -Revised Submission
2014-10-1 · The Ernest Henry SAG mill (11 MW) is currently the largest twin pinion single drive mill installed in Australia. Problems have been experienced with the twin pinion drive at Fimiston and with the ring motor at Cadia. At Cadia, excessive vibration and deflections in …
Nhận giá
