lrs and ser for a sag mill

Outotec awarded contract to supply Kansanshi copper-gold ...

Oct 10, 2008· In 2003, following a competitive tender, Outotec were awarded the contract to supply Kansanshi with a low aspect SAG mill. Not only did variations in ore type and throughput need to be considered in the mill design, but the design also needed to be flexible enough for future expansions at …

Advantages of SER drives for SAG mills | GoHz.com

Dec 19, 2014· Advantages of SER drives for SAG mills; Advantages of SER drives for SAG mills. Friday, December 19, 2014 ... starting the usual way with the LRS. ... I expect that this type of drive would be the most common large mill variable speed mill drive in the world's minerals processing industry for the range mentioned above for the last 15 years ...

lrs for ball mill - educationcare.in

The good, very good and hyper-SER - Outotec. Final commissioning of Kansanshi's 12MW SAG and 5.8MW Ball mills ... 12MW variable speed LRS drive operating …

BALL MILL DRIVE MOTOR CHOICES - artec-machine.com

The mill used for this comparison is a 4.4-meter diameter by 13.6 meter long ball mill with a 5000 HP drive motor. It is designed for approximately 90 s.ton per hour. This type two-compartment mill is a state- of-the-art shell supported cement finish mill. The torque and time requirements of the mill with the ball

Electrodrives- ElectroDrives SL Ser. Drive Specialist

We are experts in Slip Energy Recovery Drives (SER Drives), Liquid Resistor Starters (LRS), Static Excitation Systems and Harmonics filters. Find out the solutions we provide our customers for their SAG mills, AG mills and ball mills commonly used in the mining sector.

Operación Ball Mill Lrs - art-de-pierre.eu

lrs and ser for a sag mill - harambeehealthcenter. Outotec awarded contract to supply Kansanshi copper . Home > Outotec awarded contract to supply Kansanshi copper-gold mine with a low . (LRS), however this .MW SAG mill with Hyper-SER Drive and.8MW Ball Mill at . Chat en vivo; ball mill lrs dippers in south africa

SAG Mill Optimization using Model Predictive Control

exhibits many of these aspects. Maintaining the SAG mill weight at the optimum value is critical for achieving maximum grind rate efficiency and mill production (Powell, M.S., van der Westhuizen, A.P., & Mainza, A.N. 2009). However, SAG mill weight is difficult to control as the dynamic response changes as the mill approaches maximum capacity.

Milling - Energy intensive and high maintenance

• The WRIM + LRS system is causing high transient torques during the start-up. Figure 5. The WRIM + LRS is causing high transient torques during the start-up. Based on a study done by Anglo Technical Division, presented in a technical paper on the occasion of the SAG 2006 in Vancouver, B. C.

Industrial » S & K Electrical Contracting

Equigold Sag Mill Upgrade: Upgrade 11kV high voltage LRS and motor starter to Sag Mill: Mt Rawdon, Qld: 2004: ... Winners Master Electricians State Excellence Awards 2015 Winners Master Electricians State Excellence Awards 2015 Industrial/Mining Project of the Year and Residential Project of the Year categories at the recent Master Electricians ...

Starter of SAG Mills with rotor resistance - Gozuk

Q: For now I am working on a mining project which involves starting two SAG mills, the method of starting these mills is by rotor resistance and likewise we are using an energy recovery system (SER), could someone tell me how this system works SER? Each mills have two motors of 8000 kW at 13.8 kV.

Paper # 25 - Copper Mountain Overview on the Grinding ...

COPPER MOUNTAIN: OVERVIEW ON THE GRINDING MILLS AND THEIR DUAL PINION MILL DRIVES ABSTRACT This paper will first give a short overview of the Copper Mountain project in British Columbia, which just has started commercial operation earlier this year. The grinding process with one 34' x 20' SAG

sag mill control? - tambinh.nl

SAG Mill Control Instability: Causes and Solutions Oscillatory unstable behaviour in a SAG mill is characterised by the mill constantly cycling between an overload condition and recovery from that condition by a substantial reduction in feed rate tonnes. Get Price; SAG Mill Control: It …

Uneven SAG Mill Drive Power Draw - Grinding ...

A set of WRIM's running at 80% speed being controlled by an LRS is not the most energy efficient way to operate. Our last two 'large' drive SAG mills are both using WRIM's connected to SER drives. This solution seems to sit in between WRIM+LRS and SCIM+VSD as a cost effective drive solution.

mill motor lrs - educationcare.in

sag milling in australia – focus on the future - Orway Mineral ... efficiency of the mill discharge system for slurry and pebble removal, and lining configuration. ... motor, has doubled the power that can be applied to a geared drive from twin motors. Single .... No LRS is required with the SER system. A single. More details » Get Price

show ser formula for steam mill - depalenrammers.nl

show ser formula for steam mill . Compound steam engine Wikipedia. These engines use a series of doubleacting cylinders of progressively increasing diameter and/or stroke and hence volume.

sag and ball mill controls - umwelt-buero.de

mining sag and ball mill controls - auto-spec.co.za. The SAG mills use a minimal ball charge ofto%.Control of SAG Mill in the Mining Industry 183; The holistic approach to mining and mineral SAG Milling At The Fimiston Plant (KCGM ) A description of the SAG mill control system is detailed in this paper including furtherflow ball mills in closed circuit with cyclones.

LOCKED CHARGE STARTS AND YOUR GRINDING MILL Jeff …

SAG mill continually pump the finer material out of the mill, lowering ... (LRS) or Variable Frequency Drive (VFD), or it could be a clutch. Regardless ... Test and correctly set VFD or LRS – this prevents the mill starting too fast, causing the inertia to throw the ball charge. Set the clutches correctly - this ...

how to use lrs in ball mill - krugerbrau.co.za

SAG mill, Ball mill, Locked charge, drop charge, frozen charge, Liquid ... an LRS, as the amount of resistance in the circuit is much greater than the inductive component. T is .... led to excessive brush wear and subsequent slipring flashing. Read more

meaning of ser on sag mills – Grinding Mill China

meaning of ser on sag mills in How Much Crusher[], ... » photos of sag mills » maintenance of size reduction of hammer mills and plate mills. ... Maintaining & repairing Mills LRS and SER for SAG Mill. Maintaining HT switchgear and transformers. » Learn More. USING THE SMC TEST® TO PREDICT COMMINUTION CIRCUIT PERFORMANCE.

Engineering and Installation of Medium Voltage Drive for ...

The end user is setting up a new Greenfield mine in order to produce gold. The order for Ingeteam comprises the supply of medium voltage frequency converter, step down transformer and induction motor for the SAG mill, and Liquid Rheostat Starter (LRS) and slip ring motor for the ball mill.

SER Drive

The Slip Energy Recovery Drive (S.E.R. Drive) is a technology well proven in the industry for large power motoring systems that allows precise motor speed control at the same time that recover the slip energy in the wound rotor induction motors (WRIM). The typical applications include SAG mill, AG mill and ball mill.

3 - PAPER - Michael Hamilton - FINAL - IDC-Online

Starting of the mill is possible by either using two of the 1250kVA sets or one 1250kVA and the 500kVA set. No theoretical analysis had been performed on the system, due to being an existing plant. Commissioning on site involved testing the LRS for the correct resistance to ensure the mill motor would develop ample torque to accelerate the mill.

SAG Milling in Australia -Revised Submission

Developments in SAG Mill Design and Operation Over the last few years, SAG mill manufacturing technology has advanced rapidly. The bounds of mill size have been pushed from two directions. Firstly, the advent of ring motors has removed the constraint applied by the power that a …

Achievement of High Energy Efficiency in Grinding Mills at ...

ACHIEVEMENT OF HIGH ENERGY EFFICIENCY IN GRINDING MILLS AT SANTA RITA *S. Latchireddi1 and, E. Faria2 1OUTOTEC (USA) ... The SAG mill power draw realized in the operation of the plant on a blend similar to the simulation data shows the mill consumes less power than predicted without the need for pebble crushing to ... Achievement of High Energy ...

EPMA Liquid Resistance Starter - CSE-Uniserve

CSE-Uniserve has provided its LRS technology and/or integration services to prominent and . innovative Australian and global projects including: Cadia Gold Mine - NSW (NEWCREST Mining) Ball, SAG and Vertimill and conveyor applications: Single & Dual models Ratings up to 8000 kW Dual (16000 kW total) Mill start option Starting torque control

siemens grinding mills with ser drive - depalenrammers.nl

For mining operations globally, the scale and criticality of the grinding mill drive has meant that selection of the correct of large pinion driven grinding mills, the low speed induction drive offers a new reliable and robust (WRIM) with liquid rheostat starter (LRS), (ii) WRIM with LRS and slip energy recovery (SER…

SAG Mill Process Control - Grinding & Classification ...

SAG Mill Process Control - What do you prefer? Controlling Weight (within a range) by manipulating mill speed and keeping a constant feed rate? ... Grinding & Classification Circuits. ... There are multiple ways to provide variable speed, the common ones are WRIM+LRS+SER or SCIM+VSD, the top of the range is gearless mill drives. Victor Bergman ...

Starter of SAG Mills with rotor resistance - gozuk.com

Sep 17, 2013· Starter of SAG Mills with rotor resistance Hi everybody, For now I am working on a mining project which involves starting two SAG mills, the method of starting these mills is by rotor resistance and likewise we are using an energy recovery system (SER), could someone tell me how this system works SER?

how to use lrs in ball mill - jillscityspa.nl

SAG mills are autogenous mills but use grinding balls like a ball mill A SAG mill is usually a primary or first stage grinder. Live Chat; How to Make a Ball Mill: 12 Steps (with Pictures) - wikiHow ... very good and hyper-SER - Outotec Final commissioning of Kansanshi's 12MW SAG and 58MW Ball mills, 12MW variable speed LRS, ... SAG Mill, AG ...

SAG 2006 Manuscript IES Rev 2.0 - ctae.co.th

starting cycle of a SAG mill. The transfer from LRS to the Hyper SER Drive occurs where the Rotor current arrow is pointing, as it can be seen there is nochange in the rotor current during this transfer and rotor current directly proportional to load torque. Figure 1.5 Hyper SER D rive starting curve

Medium Voltage VSDs in mill drive applications

Although speed variation on mill applications is not as critical as in other applications the ability to vary the speed does provide added benefit for controlling the process. Making use of traditional slipring motors in conjunction with a LRS can offer the ability to vary the speed of the mill between 50 and of the rated speed. This is

LOCKED CHARGE STARTS AND YOUR GRINDING MILL Jeff …

LOCKED CHARGE STARTS AND YOUR GRINDING MILL Authors: Jeff Belke & Mitch Bertrand ... SAG mill continually pump the finer material out of the mill, lowering the total amount of residual fine ore and thus improving the situation in respect to locked charge starts. ... Test and correctly set VFD or LRS – this prevents the mill starting too fast ...