what are ring motors for sag mills

AYCA | Services SAG mill Ring Motors - A&CA

Semi-autogenous mills or SAG mills, as they are often called, can accomplish the same size reduction work as two or three stages of crushing and screening. Often used in grinding at modern mineral processing plants, SAG mills reduce the material directly to the desired final size or prepare it for the following grinding stages.

Sag Mill Synchronous Motors - Henan Mining Machinery and ...

the ring motor. This allows for continu-ous analysis of the system status and the ability to inform the customer in a ... ing processes using SAG mills. The most significant benefit is an up to 20 percent increase in energy savings. Also, metal liberation is improved, a reduced grind-

REMOTE DIAGNOSTIC SERVICES FOR GEARLESS MILL DRIVES

ball mills, 18x27 drive with an air clutch. motor, $602,000 6050 D Primary SAG, 34x1 6 Two vafiable speed dc motors coupled mill, $4 million 22,500 to a gear drive with air clutches. motor, $1.28 million each 6000 Two secondary ac synchronized motors coupled to a gear mill, $2.5 million ball mills, 18x27 drive with an air clutch, motor ...

When it Comes to Mining, Bigger is Best

Semi-autogenous mills or SAG mills, as they are often called, can accomplish the same size reduction work as two or three stages of crushing and screening. Often used in grinding at modern mineral processing plants, SAG mills reduce the material directly to the desired final size or prepare it for the following grinding stages.

AYCA | Services SAG mill Ring Motors - A&CA

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 …

Grinding mills - for mining and minerals processing -

Oct 19, 2020· The SAG Mill is a machine added by Ender IO. It uses Micro Infinity (µI) to grind (or mill) items into their crushed variants, like Ores into Dusts. The SAG Mill has four output slots; recipes can have 1-4 different outputs, with different chances of obtaining those outputs. Uniquely, the SAG Mill can use Grinding Balls made from various materials to increase energy efficiency (resulting in ...

Starter of SAG Mills with rotor resistance

ball mills, 18x27 drive with an air clutch. motor, $602,000 6050 D Primary SAG, 34x1 6 Two vafiable speed dc motors coupled mill, $4 million 22,500 to a gear drive with air clutches. motor, $1.28 million each 6000 Two secondary ac synchronized motors coupled to a gear mill, $2.5 million ball mills, 18x27 drive with an air clutch, motor ...

SmartMill - Grinding | ABB

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)

SAG Milling in Australia -Revised Submission

Each mills have two motors of 8000 kW at 13.8 kV. A: 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) is typically used because gearboxes and pinion gears reach their present limit in size.

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.

Mill drive selection for semiautogenous grinding mills

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 ... 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 ...

MONSAG: A new monitoring system for measuring the load ...

The standard inching drive motor is a NEMA or IEC frame typically foot mounted to a motor scoop or base plate. Typical motor speeds are either 4 or 6 pole, i.e. 1750 rpm or 1170 rpm for 60 Hz applications and 1450 rpm or 970 rpm for 50 Hz applications. The advantage of using a four pole motor allows for a smaller footprint and a smaller brake if

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.

Grinding Mill Foundations

ring-geared mills. In fact the rotor of the ring motor is the mill itself and the stator is built around the mill shell. This is also the reason why the ring motor is also known as wrap-around motor. 9 12 6 18 36 ... Presently SAG mills are mainly driven with variable speed drives, allowing the operator to react easily to the changes in ore

SAG Mill - Official Feed The Beast Wiki

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.

Mill drive selection for semiautogenous grinding mills

Oct 12, 2017· SAG is the abbreviated form for Semi-Autogenous Grinding Mill. This type of Mill is used for grinding large fragments into small pieces. Pieces are then used for further processing. The SAG mills are generally used in pre-processing of any type of material in grinding process. SAG mills are also known as first stage grinders.

Gearless Drives - Siemens

AG and SAG mills are now the primary unit operation for the majority of large grinding circuits, and form the basis for a variety of circuit configurations. SAG circuits are common in the industry based on: High single-line capacities (leading to capital efficiency) The ability to mill a broad range of ore types in various circuit configurations, with reduced numbers of unit operations (and a ...

Choosing the Right Motors for your Mills

It can be applied to new or existing AG, SAG and ball mills, powered by either ring-geared mill drives (RMD) or gearless mill drives (GMD). This solution was designed to control, stabilize and optimize mill operation. The technology supporting this solution enables accurate, consistent and tireless application of your optimal control strategy ...

SAG Milling in Australia -Revised Submission

•Select motor(s) to fit the mills. Step 1: Mill overload power •Determine a set of operating conditions that reflects the maximum "overloaded" condition that the mill should be able to handle: –SAG mills: 20% v/v ball charge, 30% v/v filling and 78% critical speed with worn liners –Ball mills: 36% v/v …

toshiba induction motor for crushing machine | Mining ...

Ring-geared mills operated with frequency converter (much more than just variable speed) (English - pdf - Article) Use of the latest technology to overcome the demands of mill operation (English - pdf - Article) Ring-Geared Mill Drives - Flexible and smooth …