ring motor sag mill

ring motor sag mill

Mining - Grinding and Processing | WEG

Sep 10, 2014· 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.

Industrial Solutions Autogenous,

The motor power, so far, can go up to 28 megawatts for such an application. An infographic of the ring motor and further visual materials can be found here. Raw material from the crushing stage is typically fed to SAG (semi-autogenous), AG (autogenous) and ball mills for further processing to break the rock into smaller pieces.

Mineral Processing | Toshiba International Corporation ...

Variable Speed . Single or double pinion driving systems. Designed to drive and control the speed of the medium voltage motors coupled to the SAG/AG, ball and HPGR mills with single or double pinion, the MVW01 frequency drive uses state of the art technology through a multilevel structure with medium voltage IGBTs, reducing the harmonic currents on the motor to extremely low …

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

Ring Motors vary the speed of the mill by changing the sta-tor frequency. A cycloconverter provides variable frequency for start, stop and speed variation during operation. Figure 1: Ring Motor of the 38' SAG-Mill of Rio Paracatú Mineraçao; Brazil 3 Design Verification To assure reliability of operation the mechanical design must be verified.

SAG Milling in Australia -Revised Submission

SAG mill with COMBIFLEX® drive for gold ore grinding. Ball mill with ring motor drive. Brake of a ring motor drive. 8 Flotation Wet grinding Grinding is one of the most energy-inten-sive production stages and therefore has a substantial energy-saving potential. The main demands made on grinding

Ring-geared mill drives - Grinding | ABB

For SAG 2, Siemens supplies two 8 pole, high speed induction motors to replace the existing slip-ring motors, eliminating all brush or slip-ring related outages and maintenance activities. The four identical variable speed drives (VSD) operating all four mill motors are Sinamics Perfect Harmony GH180 units.

Ring gear drives huge grinding mill | Machine Design

The motor power, so far, can go up to 28 megawatts for such an application. An infographic of the ring motor and further visual materials can be found here. Raw material from the crushing stage is typically fed to SAG (semi-autogenous), AG (autogenous) and ball mills for further processing to break the rock into smaller pieces.

ABB acquires ring motor business from Alstom

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.

SAG mills (semi-autogenous grinding mills) -

SAG mill Ring Motors Ball mill Ring Motors Frequency Converters High current rectifiers for EW tank houses Medium and high power synchronous motors ... » Routine maintenance, minor and major shutdowns in SAG GMD drives. » Dielectric recovery through the application of "Cryogenic Cleaning" in electric machines.

AYCA | Services SAG mill Ring Motors - A&CA

SAG mill Ring Motors Ball mill Ring Motors Frequency Converters High current rectifiers for EW tank houses Medium and high power synchronous motors ... » Routine maintenance, minor and major shutdowns in SAG GMD drives. » Dielectric recovery through the application of "Cryogenic Cleaning" in electric machines.

Gearless Drives - static.dc.siemens

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

REMOTE DIAGNOSTIC SERVICES FOR GEARLESS MILL DRIVES

A carbon brush, also known as a motor brush, is the small part of the motor that conducts electrical current between the stationary wires like stator and the rotating wires like rotor of a motor or generator. The brush is typically made up of one ...

Difference Between Sag Mill vs Ball Mill - mech4study

Autogenous and semi-autogenous grinding have experienced renewed interest as efforts to reduce operating and capital costs have increased. As a result, the mill operator is faced with new equipment perhaps ten times as large as was common in the sixties and new circuit designs with different operating characteristics. No longer can he grab a handful of mill discharge to …

REMOTE DIAGNOSTIC SERVICES FOR GEARLESS MILL DRIVES

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 re-

ABB acquires ring motor business from Alstom

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 re-

Gearless Mill Drives | Beneficiation | Global

Application: Ball Mill Equipment: 1 x 44000kW 30 pole 6600 volt Synchronous Motor Location: Kalgoorlie, Western Australia Ernest Henry Mine Application: 1 x 11000kW SAG Mill driven by Dual 5500kW motors, 1 x 5500kW Ball Mill Equipment: 3 x 5500kW 6 pole 11000 volt Wound Rotor Induction Motors Location: Cloncurry, Queensland

21' x 11' Hardinge SAG Mill - Nelson Machinery & Equipment ...

Sep 23, 2014· This means that SAG mill foundations behave very differently from ball mill foundations. 4 – Mill Designer Stiffness Criteria. One of the mill designers performs a calculation to determine the "target stiffness" of the foundations given the mill and ring motor stiffnesses.

SAG mills (semi-autogenous grinding mills) -

the accuracy of the load sharing between the two motors. KEYWORDS SAG mill, ball mill, ring gear, dual pinion, drive systems, variable speed INTRODUCTION The project is located 15 km southwest of Princeton, British Columbia (BC), an established mining town. The initial exploration at Copper Mountain dates back to 1884. In 1923, Granby

Gearless Drives - static.dc.siemens

Gearless Mill Drive (GMD) systems are characterized by having the motor wrapped around the mill like a ring. For this reason, they are often referred to as ring motors. The rotor poles are attached directly to the mill (head) flange, and hence the rotor becomes an integral part of the mill, as shown in figure 4.

Increasing availability through advanced Gearless Drive ...

Sag Mill Ring And Pinion. Sag Mill Pinion Vibration Problems As mentioned the Sag Mill was run for 8 days at its limit 5500kwto 5700 kw and this is the time the high vibration started I still have the motor suspect but the gearing pinion and girth gear did not look too bad BALL MILL GEARBOX PROBLEM Vibration.

SAG MILLING - Gearless drive system from ABB - Canadian ...

autogenous grinding (SAG) mills, or ball mills. The most important components of a GMD are the following ones: The stator is a massive electro-mechanical structure built around the grinding mill, hence its alternative names "wrap-around motor" and "ring motor" (see Figure 1). Its purpose is to

Industrial Solutions Autogenous,

Jun 05, 2013· For more information: ABB continuously extends technical and performance frontiers of ring-geared mill drive technology to fit site req...