around motor (ring motor) to the mining industry. Scanmec also developed the concept of employing shell mounted pad type bearings to reduce the peak stress levels which had previously proven to be problematic. Today, former Mills, Morgardshammar and Scanmec are member business units of the Outokumpu Mills Group.
motor drives with cycloconverters in the range around 20 MW are being applied for semiautogenous (SAG) mills and re-cently, ball mills are also being considered. This work addresses some current issues involving design and application of high-power drives employed in SAG grind-ing mills, highlighting industrial electronics aspects:
Dec 19, 2014 · Advantages of SER drives for SAG mills. Friday, December 19, 2014 . So for a fixed torque and higher speed, the power obtained from the motor is higher than the motor nameplate rating. Brush/slip ring maintenance is one issue. However, when the brushes are specified correctly for the load, the wear is manageable. .
autogenous grinding (SAG) mills in the framework of an order for two 32-foot SAG mills with a performance of 11,200 kW. This project for the Chuquicamata mine in Chile represented a monumental achievement, as the difference between creating a drive for a 21-foot diameter ring motor and a 32-foot ring motor .
Autogenous mills, semi-autogenous mills and ball mills for wet grinding. A company of Polysius ThyssenKrupp Technologies tk. 2 High-performance systems for wet grinding applications. The comprehensive range of wet grinding . of a ring motor on a SAG mill. Synchronous motor drive
A Slip Ring induction motor can be started with external resistance added in its rotor circuit. But how does external resistance aid in better starting characteristics? Read here to know about the starting arrangement and the role played by the external resistances in obtaining better starting characteristics. Also know about the qualities of slip ring induction motors.
Buy used Sag-mills from A.M. King Industries. We can help guide you to the best solution for your equipment needs.
Autogenous and Semi-Autogenous Mills The optimum solution for wet grinding. 2 AG/AG Mills AG/AG Mills 3 's AG/SAG mills accomplish the same size reduction work as 2 or 3 stages of crushing and screening The feed size for these mills is limited to the maximum size that .
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.
Feb 25, 2013 · sag mill vs ball mill. Posted at:February 25, 2013[ . SAG mills are essentially autogenous mills, but utilize grinding balls to aid in grinding like in a ball mill. . The gearless motor (also called wraparound motor or ring motor) is a very large synchronous motor. The poles of the motor are directly installed on a pole flange on .
Sep 23, 2014 · Most of our work since 2000 has been in developing grinding mill foundations to avoid vibration and unacceptable deflections. On a recent project for a plant in Peru, the client was told by the mill vendor that there was no need to do a systems (dynamic) analysis on the mill foundations because the mills on that project were gear driven rather than being driven by ring motors (gearless drives).
Selecting Inching Drives for Mill and Kiln Applications Glen Cahala Frank C Uherek, Principal Engineer - Gear Engineering Software Development Abstract The inching drive, also known as a barring or auxiliary drive, is an important component of any mill or kiln installation. It is used for maintenance and inspection purposes, as
Grinding plant with SAG and tube mill for Gold/copper ore grinding in Australia. This is the world's biggest SAG mill equipped with sliding shoe bearing arrangement and COMBIFLEX® drive system (a favourably-priced alternative to the ring motors normally used with SAG mills of this size).
FLANDERS works with steel and aluminum mills across North America and around the world. We've developed custom mill motors and drives specifically for the harshest mill environments. Our solutions withstand the high temperatures, high humidity, scale dust, heavy loads, and continuous operation that define severe-duty requirements in metal mills.
Feb 02, 2013 · Sag Mill gear failure – OneMine Mining and Minerals Library . largest gear driven sag mill. . wraparound motor or ring motor) . »More detailed. sag mill ring gear. SAG mill for sale,SAG mills Design,Used SAG wet Mill. . A ring gear and pinion set in a cement plant has two possible applications. GEAR GIRTH. Fitting of girth gear to .
EXPERIENCE WITH SYNCHRONOUS AND SLIP RING INDUCTION MOTORS DRIVING CEMENT MILLS Table of contents Section Page 1 Abstract 3 2 Introduction 3 3. Ball mill and motor 3 3.1 Ball mill load characteristics 3.2 Motor torque defined 3.3 Differentiating characteristics 3.4 Synchronous motor
Slip-ring motor manufacturer MENZEL provides short-term availability and adaptation, application-specific requirements and world-wide logistics. We can react very quickly due to a comprehensive stock of slip ring motors in a power range up to 15000 kW.
The Siemens 42-ft Gearless Mill Drive, still an evolutionary design approach? (SAG Conf. 2015) Optimization of the drive system for a cyclone feed pump (SME 2015) Increasing availability through advanced Gearless Drive Technology (CMP 2014) Design and dynamic behavior of large ring motors for grinding mills (SMMH 2012)
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Mar 12, 2015 · Jet Fuel VS Diesel VS Gasoline how they burn and what color are they. - Duration: 14:15. Just Think 5,074,629 views
Mills and GMDs Maarten van de Vijfeijken* looks at large, larger and the largest units in grinding ore T he gearless motor (also called wrap-around motor or ring motor) is a very large synchronous motor. The poles of the motor are directly installed on a pole flange on the mill shell: this means the mill body becomes the rotor. The stator of the
Every mining operation has a unique grinding process. has experience of over 8,000 grinding mills globally, including manufacturing and delivering the largest SAG/AG mills in the world. Our experts welcome the opportunity to assist you with circuit and circuit control design as well as start-up, operation, and optimization of your mill.
Aug 11, 2015 · Ball Mill Preventive Maintenance August 11, 2015 03:06:27 PM Ball mill preventive maintenance (PM) It is a frequency work to maintain and repair ball mills, AG mills and SAG mills. The maintenance work influences the rotational speed and service life of ball mills.
Outotec Grinding technologies 007 the mill drive train to be brought closer to the mill, which in turn allows for smaller foundations and lower installation costs. Mill drives Most mills are driven by ring gears, with a 360° fully enclosing guard. The ring gear casting material is either nodular iron, cast- or forged steel. These gears are usually
We buy, sell and consign SAG Mills of leading manufacturers like (Allis Chalmers, Dominion, Hardinge, Allis Minerals/Svedala), FL and many more. SAG is an acronym for Semi-Autogenous Grinding. SAG mills are essentially autogenous mills, but utilize grinding balls to aid in grinding like in a .
Nowadays more and more mills are fed by frequency converter systems, allowing for higher performance and flexibility of operation. ABB continuously extends technical and performance frontiers of ring-geared mill drive (RMD) technology to fit your site requirements.
Sep 17, 2013 · wound rotor motor is not the best option for SAG mills becuse the slip rings always are a problem even with liquid resistors.Best option is synchronuos motor in combination with variable frequency drive.However if you already have the wound rotor motor the ERS operation is simple.
SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also use grinding balls like a ball mill. A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%. The largest SAG mill is 42' (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor.
Siemens is now able to provide to mining companies a gearless drive system for SAG mills with a tube diameter of 42 feet. This enables throughput to be almost doubled in comparison with the 38-foot mills commonly used today. With this innovation, Siemens is responding to the rising demand for larger and more powerful drives in mining.