motors of sag mill

AYCA | Services SAG mill Ring Motors

SAG mill Ring Motors Ball mill Ring Motors Frequency Converters High current rectifiers for EW tank houses Medium and high power synchronous motors Low and medium voltage electrical systems PLC control and automation systems Industrial and HMI ...

Get More

AN OVERVIEW OF THE DESIGN, CONSTRUCTION, COMMISSIONING AND EARLY YEARS OF OPERATION OF THE SAG/BALL MILL …

6 The mill selection parameters were also revised as indicated in Table 3. Table 3 – 2006 Revised Grinding Circuit Key Design Parameters. SAG Mill Feed Size, F100 300 mm Feed Size, F80 125 mm Ore SG 2.9 Required Mill Discharge Size, P80 Not defined Ball

Get More

1 x SAG Mill & Siemens Motor

1 x SAG Mill & Siemens Motor For Sale/Re-Assignment Mill Details Type of Mill SAG Mill Mill Dimensions 11,582 mm x 7,759 mm (38’ x 26’) (D x L) Default Mill Speed 7.5-8.0 RPM Mill Speed 7.56-10.08 RPM Liners Excluded Mill Drive Motor

Get More

parts of sag mill presentation

Implementation of the new design in the SAG mill was carried out, resulting in an increase in daily throughout from 6-12%. Further, the time spent in liner change was reduced by 47% given the reduction in the number of parts. This operation also benefited from ...

Get More

SAGMILLING.COM .:. Articles

SAG Mill power draw models are used in mill design and grinding circuit modelling to predict how muc h pow er wi... [↓ read more ... Slide presentation providing an overview of the process for selection motors for grinding mills. Mot ors a re se... [↓ read more ...

Get More

Ball Mill Critical Speed

A Ball Mill Critical Speed (actually ball, rod, AG or SAG) is the speed at which the centrifugal forces equal gravitational forces at the mill shell’s inside surface and no balls will fall from its position onto the shell. The imagery below helps explain what goes on inside a mill as speed varies. Use our online formula The mill speed is typically defined as the percent of the Theoretical ...

Get More

SAG Mill Success—Start with the Basics

SAG mills are often flexible enough to accomplish the same size reduction provided by two or three stages of crushing and screening, a rod mill, and some or all of the With units available in ratings up to 35,000 hp, capable of supporting a grinding line that can ...

Get More

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. Inventory ID: 6C-HM03 UNUSED FL 36’ x 24' Dual Pinion SAG Mill with 2 ABB 9,000 kW (12,069 HP) Motors for Total Power of 18,000

Get More

Design and dynamic behavior of large Ring Motors for 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

Get More

Autogenous and Semi-Autogenous Mills | FL

Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW. Our team of product engineers continually improves SAG/AG Mill designs in order to provide the most robust, safe, and efficient grinding mills

Get More

Author Details

Amo-Aidoo, K., Ghana Vol 5, No 1 (2020): Ghana Journal of Technology September Issue - Electrical and Electronic Eng. Articles Oscillation Studies on Replacement of Phase–Wound Induction Motors of a SAG Mill Drive with Permanent Magnet Synchronous

Get More

SAG Mill Grinding Circuit Design

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 ...

Get More

SAG Mill Motor Breakdown

SAG Mill Motor Breakdown – Downtime Minimised PanAust advises during the course of Friday, 19 June, one of two 6.5MW motors that drive the SAG mill at the Phu Kham Copper‐Gold Operation failed. The SAG mill draws only 50% of its installed

Get More

Gearless mill drives

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 Process and operational benefits Provides maximum throughput Provides highest availability for your grinding mill ...

Get More

ChinaWidely used big size sag mill with new national …

Widely used big size sag mill with new national standard Since the early 1990s CITIC HIC has been designing and manufacturing both semi-autogenous (SAG) and autogenous (AG) grinding mills under the CITIC HIC brand. CITIC HIC manufacture a full range of ...

Get More

Gearless Mill Drives | Beneficiation | Siemens Global

Frozen charge detection and automatic loosening with gearless mill drives (SAG Conf. 2015) Mill drives: the desire for increased power and the associated limits and conditions (SAG Conf. 2015) The engineering and process effects of choosing a motor design speed (SAG Conf. 2015)

Get More

Changing sag mill liners type from Hi-Low to Hi-Hi at …

with the ball mill (6.71 × 9.91 m) discharge and sent to the cyclones. The SAG mill in phase 1 uses two 4100 kW synchronous motors and works with a constant 10.5 rpm rotational speed in two directions, and SAG mill of phase 2 uses two 3700 kW

Get More

SAG Mill motor transformer failure at Copper Mountain …

As part of the original design of the concentrator, the SAG mill and two ball mills have identical motors and transformers that are interchangeable in the event of a component failure.

Get More

Ball Mill Motors And Protection

Ball Mill Motors And Protection 2012-9-11ensp0183enspThe SAG mill draws only 50 of its installed motor power whilst treating the softer transitional ore. However, attempts on Friday night to restart the mill using one motor were unsuccessful. The failure of the SAG ...

Get More

(PDF) SAG milling at the Fimiston plant (KCGM)

Power is supplied to the motors from a cycloconverter unit to provide a controlled speed variation of the mill. Product from the SAG mill passes through internal grates onto a ...

Get More

A comparison of SAG mill power models

A comparison of SAG mill power models Alex Doll * Alex G. Doll Consulting Ltd., Canada ABSTRACT SAG Mill power draw models are used in mill design and grinding circuit modelling to predict how much power will be consumed by a particular mill geometry and

Get More

Advantages of SER drives for SAG mills | GoHz.com

Advantages of SER drives for SAG mills Friday, December 19, 2014 For large mills requiring variable speed, the wound rotor motor and SER drive are economical for a total rating of approximately 2MW to 16MW. Above 16MW, the gearless drive (cyclo-converter ...

Get More

Mining

Grinding and processing WEG offers the most reliable and efficient solutions for milling plants for ferrous and non-ferrous products with their experience of mill drive systems. In the heart of a processing plant, the ball and SAG mills must be driven by solutions that ...

Get More

Ok Tedi plans for long term with SAG mill upgrades by …

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.

Get More

Grinding Mill Foundations

 · A mill vendor is experienced in mill design and generally knows nothing about ring motors or foundations. A geared mill does not require a torsional analysis. Wrong for several reasons but for this post, the torsional harmonics can be greater than the dynamic loads of tooth mesh, mill and pinion rotation and liner loads.

Get More

Increasing availability through advanced Gearless Drive …

Mill speed can be adapted to upstream and downstream processes – avoids overgrinding, and optimizes load distribution between SAG and ball mill (Mular, Halbe & Barratt, 2002). Power consumption is influenced by load respectively torque and mill

Get More

Starter of SAG Mills with rotor resistance

 · Wound rotor motors are suitable and recommended for application for MV drive where it is required to be started on load such as ID. Fans, S.D Fans, Drill, etc. As you aware the torque is directly proportional to the rotor resistance "r2" & varies with slip "S", hence injection of resistance into the rotor via Slip Rings, High Starting Torque can be got while the Speed, efficiency and Starting ...

Get More