GMD infographic final
A 16MW GMD system has approximately 45% less power losses compared to a conventional 16MW fixed-speed mill drive system; thus resulting in energy savings to power 1701 average residential houses per day. 1701. Residential houses/day. With less service and maintenance downtime, a 16MW GMD system offers 2.7% more availability …
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ABB gearless mill drive system to power SAG mill
Summary. September 1, 2010 - ABB won an order from Newmont Mining Corporation to engineer three gearless mill drive (GMD) systems to be installed at the Yanacocha Minas Conga oxide copper gold project in Peru. Fluor Corporation in Santiago, Chile, will act as EPCM contractor for this important project; Corporation will be the mill supplier.
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Performance improvement of a slip energy recovery drive …
In this paper, the performance improvement of a slip energy recovery drive with a voltage-controlled technique using a voltage source inverter can be achieved. The total harmonic distortion of the supply line current waveforms are reduced to 6.2% at slip 0.5 and 3.6 % at slip 0.2 respectively. The power factor obtained from SERD-VSI with a ...
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Flexible Slip Energy Recovery Drive
The flexible Slip Energy Recovery Drive (SER) enhances the traditional subsynchronous SER by increasing the speed range and power while keeping the energy recovery. ... SER with SINAMICS S120 converter 3 Applications Design • SAG mills and ball mills in the mining industry, where an increase of efficiency and productivity is desired while ...
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grinding mills gmd-Reco Machine Company
Define mill mill synonyms mill pronunciation mill translation English dictionary definition of mill n 1 a A building equipped with machinery for grinding Grinding Mill / SAG mill grinding process Variable Speed Drives GMD system SAG mill …
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Recent Process Developments at the Phu Kham Copper …
a dual pinion 13 MW variable speed slip energy recovery/ hyper-synchronous drive 34 ft × 20 ft SAG mill in closed circuit with scats return conveying including a high-lift conveyor to overcome topography constraints. SAG mill discharge is classifi ed using an integral mill trommel, with minus 12 mm product reporting to a 1.85 MW cyclone feed ...
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The Siemens 42ft gearless mill drive, still an evolutionary …
sured on a real operating GMD at Goldcorp's Peñasquito mine in Mexico. The quality of the tuned FE-model is demonstrated by a Campbell diagram showing a very good …
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(PDF) Operation Analysis of a SAG Mill under Different
the complete SAG mill is about 700 kW, which verifies the energy consumed by the mill is huge, and optimizing the parameters to reduce energy consumption is of great significance. According to
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THE COMMINUTION CIRCUIT DESIGN FOR THE …
mill work index 11.4 kWh/t and an average RQD of 44%. RQD values of 25% resulted in a SAG mill feed size (F80) between 55 and 60 mm and throughputs of 6200 t/h. RQD values of 55% resulted in SAG mill feed size (F80) of over 70 mm and a SAG mill throughput of 5200 t/h. The Batu Hijau SAG mill specific energy was a function of point load test and ...
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AG
Product Size: All passing 6 mesh with 80% passing 20 mesh. Net power from pilot plant: 16.5 KWH/ST. Mill, gear and pinion friction multiplier: 1.025. Mill Power required at pinionshaft = (240 x 16.5 x 1.025) ÷ 0.746 = 5440 Hp. Speed reducer efficiency: 98%. 5440 Hp ÷ 0.98 = 5550 HP (required minimum motor output power).
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Starter of SAG Mills with rotor resistance
As per Torque / Slip characteristic for AC Motor, the value of the Max. Torque can be developed is constant while the Starting Torque occurs @ S=.1, (T proportional to r2 and S also proportional to r2 where r2 is the rotor resistance, the ratio r2/x2 when equal to 1 gives the max. Torque w.r.t Slip at Starting.
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Gearless mill drives
Go gearless to meet your business objetives by exceeding standard availability targets in your grinding operations. ABB's GMD is the most powerful mill drive system in the …
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Gearless mill drives
• 28 MW GMD for a 40' SAG mill • 28 MW GMD for 42' SAG mill Whether it is size or an installation at the highest altitude (4600 m.a.s.l.), ABB's GMDs are well positioned to …
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SAG Mill
The SAG Mill is a block added by the EnderIO mod. A machine similar to a Pulverizer or a Macerator.It is used to process resources to produce dust. It accepts energy in the form of Redstone Flux or Minecraft Joule, with an …
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ABB's new Gearless Mill Drive generation: Maintenance …
of GMD, first installed 4 years ago, operates very successfully today. The maintenance-friendly features deliver significant operating results. Remote monitoring tools are used …
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ABB increasing milling power and availability with GMDs
Case studies: Aktogay and Bozshakol. ABB has partnered with Kaz Minerals to supply GMDs for the company's Aktogay and Bozshakol copper mines in Kazakhstan, both of which are expected to process 25 Mt/y of ore. ABB was awarded a multi-million contract to provide a 28 MW GMD for a 40 ft (12.2 m) SAG mill and two 22 MW drives …
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Design SAG mill production when you need it most: In …
Cyclones work best when the cyclone feed size is limited to. 5 mm top size, as noted above when referring to screen selection. The product size is also a function of liberation and downstream requirements. SAG Mill ore hardness kWh/t: Energy required to grind an ore from F80 of 152 mm to T80 of 1.7 mm.
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(PDF) Autogenous and Semi-Autogenous Mills, 2015 Update …
Wound Rotor or Sli p Ring Motors used with speed red ucer drives and slip energy recovery . systems ... GMD SAG mills have bee n sold in sizes from 8,20 0 kW …
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Projects
The Sag mill switches over to a Slip Energy Recovery Drive after start-up. Tarkwa: Ghana Company: Goldfields. ... (16MW dual pinion) and their two Sag mills (16MW dual pinion). These are the biggest mills where the Mill Safe Start has …
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The Siemens 42ft gearless mill drive, still an …
sured on a real operating GMD at Goldcorp's Peñasquito mine in Mexico. The quality of the tuned FE-model is demonstrated by a Campbell diagram showing a very good correlation between measured and calculated natural fre-quencies. Keywords Gearless Mill Drive, GMD, 42ft Mill size, Siemens, condition monitoring, finite element analysis, ring motor.
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Slip Energy Recovery of Induction Motor using Converter
Slip ring induction motor is used as a variable speed drive in SERIM scheme. The speed of SRIM can be easily control by simple & primitive method, mechanically variation of rotor circuit resistance. This method of speed control has is very inefficient because the slip energy is wasted in rotor circuit resistance. However, …
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Operation Analysis of a SAG Mill under Different …
This method simulates the particles size, mill power, and qualified particles quality of crushed particle, which reveal the grinding strength and energy consumption of the SAG mill. In this paper, the grinding changes of a SAG mill under di erent parameter conditions are explored. Firstly, an experiment on the influence of a single parameter ...
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SAG mill drive train modernization at OK Tedi …
in PNG. M. Neurohr 1, A.Bowler 2, 1. Product Manager Mark eting - Mill Drive Syst ems, Siemens Ltd. Austr alia, Brisbane QLD 4073. Email. matt.neurohr@siem ens. 2. Senior Electrical Engin eer ...
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MOTOR TECHNOLOGY Saving energy
Mill drive example An example of slip power recovery is the wound rotor motor shown below, one of two for powering a new 10,000 kW SAG mill in Australia as shown in Figure 3. This installation includes: • Two 5000kW six-pole WRIMs with 11,000v stators • A combining gear box driving the mill • One 10,000kW liquid resistance starter (rheostat)
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Ring-geared mill drives
Mill application features. Frozen charge protection – Detects frozen charge in the mill, minimizing equipment wear and liner replacements.; Coupling supervision – Detects if a failure or slippage occurs in the couplings and stops the system in case, preventing major damages.; Stand-still detection – Prevents the motors from re-starting if the mill is still …
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Hypersynchronous SER Drives | PulseTech
Background of our Technology Partner Our SER drives are manufactured by ElectroDrives, who is one of our trusted technology partners.. Electrodrives is based in Madrid-Getafe, Spain and is a global market leader in Slip Energy Recovery (SER) Drives for Slip Ring Motors that are mainly used in the mining industry especially for SAG Mills. Following …
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Demystifying The Sag Mill: What Is It And How Does It Work?
A SAG mill, or semi-autogenous grinding mill, operates on the principle of autogenous or self-grinding. It uses a combination of ore and grinding media to break down larger rocks into smaller pieces. Understanding the working principles of a SAG mill is crucial for anyone involved in the mining industry. In this section, we will delve deeper ...
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SAG Mill | Autogenous and Semi-Autogenous Mills
Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.
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Gearless mill drive (GMD) and digital services for Kinross …
The company selected ABB's 26 MW gearless mill drive system (GMD) for the mine's 40 ft SAG mill, as well as other drives, electrical infrastructure equipment and a long-term service agreement (LTSA). This is expected to reduce operating costs, improve process throughput and reliability while saving energy and keep equipment in top form.
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Frozen charge detection and automatic loosening with …
dually set mill angle between 30° and 45° (see icon 6 in figure 4) – 30° are selected in Figure 5 – where a strong counter-torque is applied. This counter-torque of up to 130% (almost in figure 5) stops the mill shell imme-diately. The charge slips due to its high kinetic energy. For the case the charge does not slip at the first time,
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