Crushing & Grinding Machines

Online Monitoring System for Gearless and Low Speed Gear Drive

The client required an online monitoring system for its SAG mill The stator windings in the SAG mill motor have a history of becoming loose If untreated loose stator windings will lead to electrical faults with the motor and if complete dislodgement occurs damage to the stator and rotor...

sag mill dual pinion geared drive

sag mill dual pinion geared drive Our products includes five series crusher sand making machine powder grinding mill mineral processing equipment and building materials equipmentOur leading products have crushing equipment sand making equipment mobile crusher etc Each type of product is with complete specifications...

gearless mill drive

Gearless mill drives are becoming the drive system of choice on large AG SAG over the past year or so for mills ranging up to 40 ft in diameter and with drive Read more Simulation of Synchronous Motors for Mill Drives...

Autogenous and Semi

Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach When future tonnage is to be increased the SAG Mill can feed downstream ball milling to boost capacity Fuller-Traylor SAG/AG Mills range in size from 43m through 122m in diameter with powers as high as 28 000 kW...

Insurability Of Large Gearless Mill Drives

Tools used in sag mill installations2018510insurability of large gearless mill drives abstract mining industry specifically related to large gmd mill installationshese losses have led not the term risk is used ever more frequently today as is illustrated by the broad spectrum of topics where it is frequently referencedxamples include...

Lubrication System Of A Sag Mill

Gearless mill drives are becoming the drive system of choice on large AG SAG and of hydraulic and lubrication systems for the mill bearings braking and operator The SAG mill is the third 40-ft unit to be driven by a Siemens system the...

Preprint 13

Some consultants have the view that the gear drive is limited in power Mr Craig Denecki Falk Milwaukee in his paper presented at the 1996 SAG mill conference provided details of the then largest gear drive in operation on a SAG mill 34ft x 18ft at Escondida 134MW which began operation in 1995 The reason for not having larger gear drives...

grinding mills gearless

Today Outotec is the world leading supplier of gearless SAG mills operating globally Chat Online GRINDING ABB commissions six gearless mill drives at Two 28 MW gearless mill drive systems GMDS are operating in the mine s 12-metre SAG mills and four 165 MW GMDS are employed in 26 ball mills along with associated control systems...

Mining Weekly

Gearless mill drives 26th June 2009 GMDs are used on the larger ball and semi-autogenous grinding SAG mills where power transfer through the con- ventional gearbox pinion and girth gear...

SAG Mill Grinding Circuit Design

Metallurgical ContentBall Charge Motion inside a SAG MillSAG Mill OperationSemi Autogenous Design FactorsSAG Mill Operation ExampleProcess Plant DescriptionSAG Mill Design and Specification Operating Problems Since CommissioningDesign Changes and Future Operating Strategies AG and SAG mills are now the primary unit operation for the majority of large grinding circuits and form the...

What s the Difference Between SAG Mill and Ball Mill

Nov 26 2019 0183 32 SAG mill vs Ball mill Crushing ratio The biggest characteristic of the sag mill is that the crushing ratio is large The particle size of the materials to be ground is 300 400mm sometimes even larger and the minimum particle size of the materials to be discharged can reach 01 mm...

Ring gear drives huge grinding mill Machine Design

The SAG mill is followed by two 20-ft diam 7 500-hp gear-driven ball mills Another type of drive less commonly used consists of a motor-driven speed reducer that is coupled to one of two...

list of 40 foot sag mills worldwide

Conga The world s first 42-foot diameter 28 MW gearless SAG mill SAG mill 40 ft 42 ft gearless mill drive GMD SAG manufacture reliability The results of these studies showed that a single line 40 ft SAG mill circuit gave the best project economics mill will be the first 42 ft diameter SAG mill in the world Get Quote...

Gearless mill drives

Gearless mill drives GMDs have been installed on platinum-miner Anglo Platinum s Potgietersrust Platinum PPRust 600 000 t/m concentrator SAG mills where power transfer through the con...

Gearless AG/SAG Mills

Gearless AG/SAG Mills 2 Pag The sights and sounds of large grinding mills in operation are impressive to even the most seasoned mill operator Grinding systems are a symbol of the application of brute force to extract mineral wealth from nature and are a major and critical part of any mineral processing facility Drive control...

types of sag mill

Gearless Mill Drives Beneficiation Siemens Global Website 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 Chat Online...

sag mill trommel screen for iron ore

Sag Mills For Iron Ore » sag mill trommel screen for iron ore » sag mills for iron ore » gear drive sag mill vs gearless drive sag mill » sag mill trommel screen for iron ore » sag Get Price sag mill trommel design - batsinstitutionsin trommel screens SAG involving grate sizes inside the SAG mill and trommel screen...

advantages of gearless drives on ball mills

SIMINE Gearless Mill Drives - Siemens Find out instantly how the mill and Gearless Drives are Power 24 000 kW for a 40 ft SAG mill Power 16 400 kW for two 26 ft The SIMINE Gearless mill drives pump system significantly enhances concentrator productivity by eliminating the reducer gear between motor and pump and all corresponding...

Modernization down under

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 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...

A Mechatronic Solution Design and Experience with Large

of large gearless cycloconverter drive sys-tems for SAG-Mills has become more and more common in the recent years Very high power ratings with excellent dynamic performance and high efficiency over a wide speed range allow advanced optimi-zation of the process The design of such large mill drive systems requires modern...

sag mill drives girth gears at 18000 hp motors

Sag Mill Drives Girth Gears At 18 000 Hp sag mill drives girth gears at 18 000 hp operation and performance this paper was originally presented at the vancouver sag mill conference in 1996 reducing the fatigue life of a girth gear girth gear driving a ball mill the failure the girth gear is the most critical component of the mill drive in...

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 164 MW...

sag mill bull gear

sag mill bull gear We will begin with the mills bull gear assembly and work towards the motor The BULL GEAR sometimes called the RING GEAR is designed to turn the mill transforming the energy of the motor into motion for the mill By mill we refer to Ball Mills Rod Mills and SAG Mills Anything gear and pinion really...

gearless mill drives Archives

The 12 billion expansion which saw throughput rise from 60 000 t/d to 120 000 t/d involved the addition of two new thyssenkrupp-made ball mills with ABB providing the gearless mill drives GMD technology This came on top of the 33 mills the miner already had up and running as part of the existing 60 000 t/d plant at the operation...

geared vs gearless drive solutions for grinding mills

advantages of gearless drives on ball mills Ring gear drives huge grinding mill machine design following the sag mill will be two hp ball mills each one ft in diam and a ring gear drive offers several benefits such as simplicity low cost and ease of and a ring motor gearless drive either of which wraps around the mill...

Grinding Mill Foundations

Sep 23 2014 0183 32 Most of our work since 2000 has been in developing grinding mill foundations to avoid vibration and unacceptable deflections On a recent project for a plant in Peru the client was told by the mill vendor that there was no need to do a systems dynamic analysis on the mill foundations because the mills on that project were gear driven rather than being driven by ring motors gearless drives...

inching drive for sag mill

Twiflex modular braking system ensures safety and reliability on sag Aug 4 2011 So for the 22MW SAG mill zenith turned to Twiflex Twiflex has been supplying brake systems for gearless SAG and ball mill drives since 2004 and remote operation for inching and creeping duties through a control panel...

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...

SAG Ball Mill Grinding Circuit

Oct 08 2017 0183 32 https //911metallurgist/equipment/...

pinion drive sag mill in europe

Zamudio Vizcaya Spain obtained using latest technology Variable Speed Drives VSD machines to the current multi-stage semi-autogenous SAG and ball mill circuits and the low speed side is connected to the pinion and ring gear Get Price Updates on geared vs gearless drive solutions for grinding mills Gearless Mill Drive...