largest gear driven sag mill

INNOVATION NEWS Mills and GMDs - ABB Ltd

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

Farnell-Thompson

PHOENIX PROJECT, NEWMONT GOLD, NEVADA, USA. For their largest, most recent North American Phoenix project, Newmont Gold elected to procure their one 36' gearless driven SAG mill and two 21' gear driven ball mills through Farnell-Thompson.

Mills - SAG, Ball & Rod - CJT Surplus Equipment

Mills: SAG, Ball & Rod Point to a thumbnail to enlarge the image. Click to display largest image in this tab or window (use browser back button to return here).

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 mill and two 24' x 39.5' ball mills will be briefly discussed. All three mills are gear driven …

Fuller Sag Mill - Item# S738506 - YouTube

18.04.2014· SAG mill, 18' diameter x 10-1/2' long, manufactured by Fuller, rubber-lined, driven by 1500 HP, 4160 volt, 1192 RPM, continuous motor, 5010 frame, thru Moventas gear reducer, 4.5:1 gear …

Ring gear drives huge grinding mill | Machine Design

The Escondida SAG mill will be, by far, the largest gear-driven mill. The next largest is Asarco's 34-ft diam., 19-ft long, 14,000-hp mill in Arizona. The next largest is Asarco's 34-ft diam ...

Gearless Drives - industry.siemens.com

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

SAG Mill Variable Speed Drive - 911metallurgist.com

Large scale equipment can reduce both capital and operating costs for concentrators. Large semiautogenous mills can be effectively utilized in big mills but they must be kept fully loaded to take advantage of their great potential.

Mining Industry: What is a grinding mill? How does it work ...

A grinding mill is a large tubular machine with a crown gear driven by a pinion, which is driven by a reduction gear and electric motor. Some large SAG mills have what we call a "wrapped" motor drive, which is the motor fields are installed surrounding the entire circumference of the mill, with the mill …

Girth Gears - More than Just Metal and Teeth

Girth Gears — More than Just Metal and Teeth Steve Lovell Introduction The clear majority of published knowl-edge about gear manufacturing relates

Ball Mill Drives - Mineral Processing & Metallurgy

Several types of ball mill drives can be furnished, made up of various combinations of gearing, motors and transmission equipment. The correct combination to be selected takes into consideration power requirements, gear ratings, floor space, interference from other …

Autogenous mills, semi-autogenous mills and ball mills for ...

driven SAG mill for gold ore grinding. SAG and ball mills for com-minuting gold/ copper ore. Site assembly of a large mill shell. 3 The design offers such benefits as: xElimination of castings and the structural risk associated with them. xFeed and discharge designed to process requirements rather than to restrictions imposed by trunnion bearings. xMinimised risk of feed blockage through short ...

SAG Mill - Semi-Autogenous Grinding Mill

A SAG mill is characterized by its large diameter and short length. It rotates, tumbling its contents violently, causing a breaking action.

Quicker to the gold - Process Industry - Industry - Home ...

Cemtec has built one of the world's largest mechanically driven horizontal mills for a gold mine in Russia. This milling system is driven by specially designed Siemens gears that transmit extremely high volumes of power to the mill via a girth gear.

Mining & Non-Ferrous - CITIC-Heavy Industries Co. Ltd

CITIC HIC manufacture a full range of Grinding Mills for the Mining Sector. Our largest mills has been delivered to SINO Site to date are Ø12.2m x 11m 28MW Gearless Drive AG Mills and Ø7.9m x 13.6m 2x8 MW Twin Pinion Drive Ball Mills.

Girth Gear - greatwallcasting.com

Girth gears (Gear wheels) are large ring gears which are normally fitted to the outside of ball mills or rotary kilns to provide the primary rotational drive,which is required to be operated in a long time So, the quality requirements during the actual production for the big gear ring are very high Girth gears are applied in the mining, cement ...

Industry Sector Drive Technologies Division - Siemens

This two-stage grinding circuit consists of a 40 ft SAG (semi- autogenous grinding) Mill with a 20 MW Siemens gearless drive and two parallel 10 MW gear driven ball mills.

Siemens modernises SAG mill gearless drive in Cadia Valley

This two-stage grinding circuit consists of a 40 ft SAG mill with a 20 MW Siemens gearless drive and two parallel 10 MW gear driven ball mills. 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 ...

Crusher - Wikipedia

Additionally rockbreakers are typically located next to a crusher to reduce oversize material too large for a crusher. Crushers are used to reduce particle size enough so that the material can be processed into finer particles in a grinder. A typical processing line at a mine might consist of a crusher followed by a SAG mill followed by a ball mill. In this context, the SAG mill and ball mill ...

866 IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 41 ...

RODRIGUEZ et al.: HIGH-POWER GRINDING MILL DRIVES IN MINING APPLICATIONS 867 Fig. 1. Typical configuration of a mill with a girth gear and double pinion.

Ball Mills - Metallurgist & Mineral Processing Engineer

Cylindrical Ball Mills The only cylindrical ball mills in common use are those of the grate discharge type, the most important being the Marcy and the Allis-Chalmers mills. Fig. 10 illustrates the construction of the Marcy Ball Mill .

Mill Process - Grinding Mills - miningsurplus.com

Mill Process - Grinding Mills. Grinding Mills also know as Semi-Autogenous (SAG), Ball or Regrind Mills are used in the primary or early stages of pulverizing the ore in the process plant.

Mill (grinding) - Wikipedia

SAG mills are autogenous mills but 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%. A SAG mill …

Outotec Grinding technologies

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 designed with helical type teeth to make them ...

CITIC-Heavy Industries Co. Ltd

CITIC HIC have received an order for the JiangXi Copper Project for a Ø10.37m x 5.19m SAG Mill and a Ø7.32m x 10.68m Ball Mill for their copper project in... 15 March 2008 ESSAR Order

FL to deliver world's largest gear-driven mills ...

The contract includes delivery of a 76,000 tonnes per day grinding circuit consisting of two very large SAG mills and two ball mills. The mills will be the largest gear-driven mills in the world ...

Selecting Inching Drives for Mill and Kiln Applications

Article Reprint Source: IEEE Standards Association Selecting Inching Drives for Mill and Kiln Applications Glen Cahala Frank C Uherek, Principal Engineer - Gear …