Used Sag-mills For Sale

Buy used Sag-mills from A.M. King Industries. We can help guide you to the best solution for your equipment needs.

Siemens modernises SAG mill gearless drive in Cadia Valley

Siemens has now fitted the SAG mill with a Sinamics SL 150 cycloconverter for closed-loop control as well as with a Sinamics DCM control module for the excitation circuit – the first time that both types of converter have been used in a gearless drive. The grinding mill control system was switched to Simatic S7 and the control system to ...

SAG Milling in Australia -Revised Submission

The CCV – ring motor (gearless) drive is used at Cadia (20 MW) and Olympic Dam (18 MW). It has been the industry standard for SAG mills above 13 MW capacity. However, pinion systems to 8 MW per pinion and dual motor systems with quadruple pinions extend the range of gear driven mills to a theoretical limit of 32 MW. The Ernest Henry SAG mill

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

advantageous features which were previously exclusively available on gearless mill drives. GRINDING CIRCUIT The grinding circuit for the Copper Mountain project consists of one FL SAG mill and two FL ball mills. Figure 1 - Overview grinding circuit The Copper Mountain SAG mill is 10363 mm [34 feet] in diameter and 6096 mm [20 feet ...

Gearless Mill Drive Sales Rev Up to Meet Demand

Gearless Mill Drive Sales Rev Up to Meet Demand By Russell A. Carter, Managing Editor. Gearless mill drives are becoming the drive system of choice on large AG, SAG and ball mill installations for new projects and existing mill expansions. At least 31 GMDs have been ordered from Siemens and ABB, for .

to Build Largest SAG Mill for Newmont's Minas Conga ...

E&MJ reported in October 2010 (See "SAG Mill Gearless Drives Go to South American Projects,"p. 102) ABB Group's Minerals Division had won an order from Newmont Mining Corp. to engineer three gearless mill drive (GMD) systems to be installed at its Yanacocha Minas .

Gearless Drivesns

Utah, SAG mill and a 11,200 kW gearless drive for the El Teniente, Chile, SAG mill. In a continued call for larger, even more powerful drives, Siemens kept pace. In 1996, Freeport ordered the first gearless drive for a 38-foot SAG mill located at the company's Grasberg plant in Indonesia. This gearless drive .

Mill (grinding) - Wikipedia

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.

Commissioning Variable Speed SAG Mill Gearless Drive

Table of ContentsGeneral Description of the DriveAssembling and ConstructionComponent CharacteristicsDrive Evaluation The electric operation and design features of the 11,000 H.P. variable speed SAG mill gearless drive is presented. The function of the frequency-converter, control system drive and lubrication systems are described. An analysis of the harmonic characteristic in the Supply ...

Grinding mills -

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.

ABB gearless mill drive & digital services help increase ...

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.

Gearless Mill Drive Sales Rev Up to Meet Demand

Gearless Mill Drive Sales Rev Up to Meet Demand By Russell A. Carter, Managing Editor. Gearless mill drives are becoming the drive system of choice on large AG, SAG and ball mill installations for new projects and existing mill expansions. At least 31 GMDs have been ordered from Siemens and ABB, for .

Increasing Availability through Advanced Gearless Drive ...

Siemens' gearless drive technology of 99.46 to 99.71% - as confirmed by real operational data from the Antapaccay mine in Peru. It was the first plant worldwide to use gearless drives for both applications. KEYWORDS Gearless Mill Drives, Gearless Conveyor Drives, Availability, SAG Mill, Ball Mill, Overland Conveyor, Antapaccay 15

Gearless Drives for Ore Conveying and Grinding - Cmms ...

Siemens, the company that introduced Gearless Mill Drives (GMD) to mining industry started up its first GMD on a ball mill in Norway in 1980. The mill and its drive system are still in service. Today, GMDs are mainly used for SAG mills between 36 and 40 feet (10.7 to .

Gearless drive systems for belt conveyor and grinding ...

The SAG mill was fitted with a gearless drive with a power rating of 24 MW and the ball mills were also fitted with gearless drive systems, each providing 16.4 MW. Also included in the scope of ...

Gearless mill drives - Grinding | ABB

ABB's Gearless mill drive system is the most powerful mill drive system in the market to power semiautogenous (SAG), ball and autogenous (AG) mills

ABB gearless mill drive & digital services help increase ...

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.

Increasing availability through advanced Gearless Drive ...

The Gearless Mill Drive system consists of the ring motor with its feeding cycloconverter, pre-installed in an E-house. It also includes the excitation rectifier, the automation sys-tem (for mill and motor) including HMI, monitoring and diagnostic system, MCC's (for mill and drive auxiliaries),

Gearless mill drive images - ABB Group

22.4MW GMD system for a 40-foot semi-autogenous (SAG) mill at Esperanza copper mine, Chile: 01127262_2.jpg: 9462 kB: GMD at Esperanza copper mine, Antofagasta, Chile. 01126997_2.jpg: ... Gearless_mill_drive.jpg: 9609 kB: 22.5MW GMD system for a 38-foot autogenous (AG) grinding mill at Boliden Aitik mine, Sweden:

The operation modes of a grinding mill with gearless drive

behavior of the gearless drive and of the mill during these modes of operation. Normal Start can be operated from the local control panel or remotely. The gearless drive accelerates the mill slowly to the preselected speed. In the Normal Stop procedure, the gearless drive reduces the mill speed to zero and stops the mill without oscillation ...

INNOVATION NEWS Mills and GMDs - ABB Group

reliable drive system for SAG mills. Early SAG mills had a diameter of about 32', later increasing to 34, 36, 38 and 40'. At the same time the mill volume also increased. Typically a SAG mill has a much larger diameter compared to its length. Yet the SAG mill of Newmont's Yanacocha mine in Peru is a single

2009 Gearless Mill Drives - CB&MUA

Marsh 1 WHY shift to the gearless drives in mineral processing ??? Mill size – grinding economies of scale Relative lifecycle cost Lower power consumption Robust design Avoiding critical open gear power trains Variable speed Compatibility with processing plants Engineering design efficiencies Availability Minimal downtime

Gearless mill drive system in iron ore ­processing ...

ABB was recently contracted to supply gearless mill drive (GMD) systems for two 38 foot semiautogenous grinding (SAG) mills at the Serra Azul iron ore mine in Brazil. The Serra Azul mine unit, owned by MMX Mineração e ­Metálicos, an EBX Group company, is located in the iron quadrangle of Minas Gerais, next to Belo Horizonte – the heart of ...

Ring gear drives huge grinding mill | Machine Design

Ring gear drives huge grinding mill. ... this semi-autogenous grinding mill (SAG — see next section) will use a 43-ft diam. ring-gear drive to transmit 18,000 hp and handle up to 3,000 metric ...

SAG Mill Gearless Drives Go to South American Projects | E ...

SAG Mill Gearless Drives Go to South American Projects. October 2010 | Suppliers Report. In early September, ABB Group's Minerals Division announced it had won an order from Newmont Mining Corp. to engineer three gearless mill drive (GMD) systems to be installed at the Yanacocha Minas Conga oxide copper-gold project in Peru.

Current Issues on High-Power Cycloconverter - fed Gearless ...

II. BACKGROUND: SEMIAUTOGENOUS GRINDING (SAG) MILL WITH A GEARLESS DRIVE Fig. 1 shows the general scheme of a mill with gearless motor drive. The rotor poles of the synchronous machine are bolted to the mill. There is no gear, because the elec-tromagnetic torque is generated directly to the mill. The sta-

• Published in: international symposium on industrial electronics · 2003Authors: Jorge Pontt · Jose Rodriguez · Waldo Valderrama · G Sepulveda · P Chavez · B CuitinoAffiliation: Valparaiso UniversityAbout: Power quality · Ball mill · Process control · Economies of scale · Information technology[PDF]GET PRICE >>

SAG mills -

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.

ABB gearless mill drive system will power world's first 42 ...

ABB gearless mill drive system will power world's first 42 feet SAG mill Newmont Mining Corporation selects ABB to design three gearless mill drive systems for their new high-altitude copper gold project in Peru. Baden, Switzerland, September 1, 2010 – ABB, the leading power and automation technology group, won an order from Newmont Mining ...

Gearless Drivesns

Utah, SAG mill and a 11,200 kW gearless drive for the El Teniente, Chile, SAG mill. In a continued call for larger, even more powerful drives, Siemens kept pace. In 1996, Freeport ordered the first gearless drive for a 38-foot SAG mill located at the company's Grasberg plant in Indonesia. This gearless drive .

Gearless drive systems for belt conveyor and grinding ...

The SAG mill was fitted with a gearless drive with a power rating of 24 MW and the ball mills were also fitted with gearless drive systems, each providing 16.4 MW. Also included in the scope of supply were transformers, E-houses, the drive control, the cooling system, protection equipment and .