Major Mines & Projects | Essakane (CIL, HL) Project

• One ball mill of 7 MW • Two pebble crushers, one on line A and one on line B • Two gravity concentrators • Eight CIL tanks. The ore is crushed in a gyratory crusher and in a cone crusher. The crushed ore is stockpiled either in a pile for Line A or Line B. The ore is reclaimed with apron feeders and feeds SAG mills on each line.

GEARS & DRIVES IRevival of the GMD in cement

2018-5-9 · SAG mills) as well as the way the poles are mounted depends on the size of the motor. Figure 3 shows the mounting of poles on a large SAG mill. All rotor poles are connected in series and powered from sliprings with a DC current to produce a static magnetic field. Brushes connect the slip rings to the field supply unit located in the cyclo

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 …

Outotec presents the world''s largest SAG mill

2012-9-21 · The mill will be driven by a Gearless Motor Drive (GMD) which at 28.0MW is equal to the largest grinding mill power ever used in the mining industry. The SAG mill design is based on Outotec''s proprietary grinding mill technology, developed over decades for maximum reliability and performance.

Major Mines & Projects | Kinsevere Mine

Although the acid concentration in the SAG mill circuit is lower than that in the leach tanks, it is very effective because of the high kinetic energy in the SAG mill. The SAG mill has a mild steel shell with an epoxy coating on the inside to prevent acid erosion. The mill is …

Cycloconverter

Cycloconverter (static Scherbius system) A cycloconverter is a converter that converts AC voltage of one frequency to another frequency without an intermediate DC link. When a cycloconverter is connected to the rotor circuit, sub- and supersynchronous operation variable-speed operation is possible. In supersynchronous operation, this ...

Wound Rotor

2019-10-3 · Slip Energy Recovery Systems Soft Starters Dual Load Sharing, Running Duty, or Starting Duty Secondary Resistance Controllers A variety of enclosure options are available to provide protection to your motor investment. Our wide selection allows you to choose the one that best meets your unique needs: ODP Open Drip Proof (IP 12)

siemens /mining Flexible Slip Energy Recovery Drive

2021-8-20 · The flexible Slip Energy Recovery Drive (SER) enhances the tradi- ... • SAG mills and ball mills in the mining industry, where ... • Optimization of the mill''s throughput and thereby energy consumption • High overall drive efficiency, since converter power

Gearless mill drives

Gearless mill drive system (GMD) 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 market to power semiautogenous (SAG), ball and autogenous (AG) mills, This ''workhorse'' for grinding operations combines a robust ...

Motors Drives | Toshiba International Corporation

Toshiba International Corporation (TIC) is Toshiba''s premiere manufacturing base in North America. Products include electric motors and motor controls, adjustable speed drives, power electronics, transmission and distribution systems, and more.

Slip Energy Recovery Drives (SER) Australia | CSE Uniserve

Description. The CSE Uniserve Rotor Drive Slip Energy Recovery System (SER) is designed for reliable and repeatable mill starting and speed control and to return all unused energy into circuit below when operating speed. It exclusively offers operators full torque at hyper synchronous speeds. Typical applications include mills…

Environmental and Social Review Summary

2017-4-25 · grinding (SAG) mill with gearless mill drive (GMD) to increase the existing plant capacity from 8 kt/d to 12 kt/d. This expansion has been sized to accommodate the proposed Phase 2. Phase 1 also includes the addition of three leach tanks, new tailings facility capacity, new process water pond and upgrades to some reagents'' areas.

Planned Maintenance Systems & Solutions In Australia | …

Rotor Drive Slip Energy Recovery: QLD: SAG Mill sub and hyper synchronous speed control and starting with Unistarter LRS. Water: Fuji LV Drives: QLD: Specified drives due to ongoing reliability and locally-based service and support. Mining: Rotor Drive Slip Energy Recovery: QLD: Pump drive and energy recovery. Mining: Transformers: QLD

Autogenous grinding mills (AG mills)

Gearless mill drive (GMD) technology has further expanded the use of large AG milling allowing Outotec to produce the world''s largest SAG mill of 42'' in diameter drawing power at 28 MW. Today, Outotec is the world leading supplier of gearless AG mills operating globally.

CMP Paper 16.10.09 Final

2018-5-9 · When mill diameter and mill power became again increased, only the Gearless Mill Drive (GMD) could be envisaged to cover this requirement above 10 MW. The GMD is by its nature a variable speed drive system. Process operators, once having the facility of adjustable speed, could not live anymore without it for SAG mills.

Drilling down to the details of fragmentation

2021-9-20 · Drilling down to the details of fragmentation. Figure 1. Interaction of rock strength and characterisation with blast design. Mining promises few guarantees, but a reduced ore yield is a certainty if errors are made at any stage of the complex, multi-layered drill and blast process. The potential for wasted energy, time, and opportunity costs ...

siemens /mining Flexible Slip Energy Recovery Drive

2021-8-24 · The flexible Slip Energy Recovery Drive (SER) enhances the tradi- ... For example, the mill speed can be increased to reach the best grinding results and efficiency, to tap the full potential of the mill. In case ... • SAG mills and ball mills in the mining industry, where

SAG mills

Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing Outotec to produce the world''s largest SAG mill of 42'' in diameter drawing power at 28 MW. Today, Outotec is the world leading supplier of gearless SAG mills operating globally. Premier™ horizontal grinding mills - Engineered to excel.

Phil Gunn

This includes Electric and Hydraulic Shovels, Haul Trucks, Sag and Ball Mills, VSD''s, Slip Energy Recovery Drives, Cyclo Converters Drives etc. Specialties: Engineering Management, Project Management, Electrical Engineering, HV power systems, Ring Motors, Variable Speed Drives, Slip Energy Recovery Drives and Cycloconverter Drives, Remote ...

to Design and Supply the World''s Largest SAG Mill …

2010-10-5 ·  has been selected to design and supply a 42ft x 25ft, (12.8m x 7.6m) 28MW gearless SAG mill, plus two 26ft x 42ft, (7.9m x 12.8m) 15.6MW ball mills and two VTM-1500-WB VERTIMILLS® for Newmont Mining''s Yanacocha Conga copper-gold project in Peru. The 42ft diameter SAG mill is the world''s largest and the first of its kind.

Electro Drives S.L. | LinkedIn

Specialties. Power Electronics, SER Drive (Slip Energy Recovery), LRS (Liquid Resistor Starter), Doubly Fed, Power Converter, Medium Voltage Drives, Mini-Hydro Generation, SAG and Ball Mills ...

Kabwe Sergues

About. I have sixteen years hands on experience in installation, troubleshooting, commissioning and maintenance. Worked on master drives, simocode, robicon drives, LRS starters for crushers / mills, rectiformers and SER Slip energy recovery drive for the mills. I have experience in motor maintenance 5.8MW Teco mill motors for sag /ball mills, 6 ...

Products & Solutions for the Mining Industry

2021-6-11 · high-speed, geared mill applications, we offer a variety of innovative and differentiating technology to suit the budget, including drives for slip energy recovery systems. These enable speed and process adjustment for mills using wr IM technology. Our mill Master Sequence Control (MSC) has many automation embedded software features

SER Speed Control | Automation & Control Engineering …

 · Dear all, I am Graduate Control System Engineer for a processing mining plant at the moment as my background is Electrical Engineering. here we''ve got a SAG mill that its speed is being controlled by Slip ring Energy Recovery (SER) system with the motor speed range is 85-105%. my question is how the SER adjust the speed in this range? which parameter perform to rotor to revolving faster than ...

Ball Mills

2017-2-13 · Ball Mills can be supplied with either ceramic or rubber linings for wet or dry grinding, for continuous or batch type operation, in sizes from 15″ x 21″ to 8′ x 12′. High density ceramic linings of uniform hardness male possible thinner linings and greater and more effective grinding volume.

Electro Drives S.L. | LinkedIn

2014. Especialidades. Power Electronics, SER Drive (Slip Energy Recovery), LRS (Liquid Resistor Starter), Doubly Fed, Power Converter, Medium Voltage Drives, Mini-Hydro Generation, SAG and Ball Mills, Mining, Energy Storage Systems, Service and maintenance, IGBTs and IGCTs y Digital Controls.

MOTOR TECHNOLOGY Saving energy

2017-4-9 · 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)

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.

(PDF) Autogenous and Semi-Autogenous Mills, 2015 Update

GMD SAG mills have bee n sold in sizes from 8,20 0 kW (11,000 HP) through 28,000 kW, (37,548 HP). The first SAG mill to utilize a GMD motor design were the two 32'' x 17'' (1 5'' EGL) - 8,2 00 kW