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further 40 projects worldwide energy efficient Hyper Synchronous SER drives are now mature and ready for use on 2 X 10MW dual drive mills Speed variation required is in the range of 15 of synchronous motor speeds VVVF drive packages from ABB and Siemens are also available for 2 x 10MW in low and high speed options

PDF Evaluation of synchronous motors on grinding mills

Evaluation of synchronous motors on grinding mills or a 20 H z base frequency design on a 12 pole motor or even a 10 H z base is a synchronous drive of grinding ball mills 4 MW 150 rpm

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Toshiba International Corporation TIC is Toshiba s premiere manufacturing base in North America Products include electric motors and motor controls adjustable speed drives power electronics transmission and distribution systems and more

Case Study Grinding Mill Bearing Failure SlideShare

Jul 31 2013 nbsp 0183 32Case Study Grinding Mill Bearing Failure two 2 cylindrical roller bearings and one 1 ball bearing The mill is being belt driven by a 100 hp twopole motor The mill normally operates at 3 150 rpm 1 Outboard Motor Bearing Legend 2 Inboard Motor Bearing 3 Inboard Mill Bearing 4 Outboard Mill Bearing Bearing that was failing The

Causes of frequent burning of induction motor 400kw slip

Dec 19 2011 · I am currently assign to investigate the frequent burning of Ball Mill motor slip ring Induction Motor Specification 400KW output 870rpm 3300V 60hz 8 poles This motor drives an equipment called Ball Mill My initial finding is that maybe the motor experienced over loading which allows users to draw from an almost limitless amount

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Ball Mill Critical Speed amp Working Principle YouTube

Jun 19 2015 nbsp 0183 32The effect of Ball Mill RPM speed going from subcritical to supercritical helps understand the Ball Mill Working Principles of ballonball VS ballonshell grinding The Motion of the Ball

Ball Mill FTM Machinery

The ball mill is mainly composed of a feeder a discharging port a turning device transmitting devices that include a reduction gear a small transmitting gear a motor and the electric control The hollow shaft is made of cast steel so that the inner lining can be replaced

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New and Used Ball Mills for Sale Savona Equipment is a new and used Ball Mill supplier worldwide A ball mill is a type of grinder used to grind materials into extremely fine powder for use in mineral dressing processes paints pyrotechnics ceramics and selective laser sintering

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the applied frequency and or the number of poles to optimize the motor for a specific commutation process As the AFD is rarely intended to frequency is typically between 40 and 44 of the line utility Case Study Application of Asynchronous Low Speed Motors for Mining Ball Mill Application

Case Study Grinding Mill Bearing Failure SlideShare

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ball mill at Ciments Lambert Lafarge France The 22 MW GMD for 28 ball mill 28 MW GMD for a 40 SAG mill The poles of the gearless or synchronous motor also called wrap around motor or ring motor are directly installed on the pole flange of the mill

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Integrated Power Services or IPS is the leading provider of electric motor and generator repair services in North America Headquartered in Greenville SC with locations coast to coast we offer in shop repair services field services and distribution to over 4 000 customers working in continuous process asset intensive industries

Synchronous motor Wikipedia

Single phase synchronous motors such as in electric wall clocks can freely rotate in either direction unlike a shaded pole type See Shaded pole synchronous motor for how consistent starting direction is obtained The operational economics is an important parameter to address different motor

SAG Milling in Australia Revised Submission

mill and there is nothing to prevent a 1 1 aspect ratio mill of say 10 m dia x 10 m EGL equipped with a 20 MW motor from being fabried Such a mill would have a less arduous environment than say a 13 4 m 44ft diameter mill Slurry transport issues then dominate the mill selection rather than mechanical structural constraints

Choosing a SAG Mill to Achieve Design Performance

Choosing a SAG Mill To Achieve Design Performance John Starkey1 Principal Consulting Engineer Sami Hindstrom2 Manager provide the required grinding chamber and motor to draw the required grinding power This 40 60 80 100 0 2 4 6 8 10 12 14 SAG Shell Energy to Grind to T80 1700 microns kWh t C u m Di s t o f O r e

GROSS POWER CALCULATOR SMC Testing

3 26 6 40 belly length inside liners ft 5 40 1 5 31 5 liner thickness inch 2 6 2 6 eg the power draw shown may be motor input power less various estimates for motor drive train and bearing losses to arrive at a an Predicted Power Draw kW Ball mills AG SAG Mills 5 Figure 2 – Overflow Discharge Mill

Bearing Failures Case Study Allied Reliability

The asset is a vertically mounted belt driven grinding mill as shown in Figure 1 The drive spindle has three 3 bearings two 2 cylindrical roller bearings and one 1 ball bearing The mill is being belt driven by a 100 hp two pole motor The mill normally operates at 3 150 rpm

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PREMIUM EFFICIENCY MOTOR SELECTION AND

PREMIUM EFFICIENCY MOTOR SELECTION AND APPLICATION GUIDE i ACKNOWLEDGMENTS The Premium Efficiency Motor Selection and Application Guide and its companion publication Continuous Energy Improvement in Motor Driven Systems have been developed by the U S Department of Energy DOE Office of Energy Efficiency and Renewable Energy EERE with support

Line Start Permanent Magnet Synchronous Motor 630kW 187

Mar 04 2016 · Flagship project Line Start Permanent Magnet Synchronous Motor 630kW 6kV 187 5rpm 32 poles manufactured by DFME driving a single pinion ball mill in KGHM Concentration Plant Start up seems

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Air Classifier Mill Specifications Available in a range of sizes from 2 kW Lab R D version up to 600 kW Range also includes two special designs ACM EC easy clean with CIP capability and ACM SB split body where the mill cover opens to allow both body sections

Synchronous Motors ZCL Electric Motor Technology Co

High Voltage Motor High Efficiency Motor Synchronous Motor manufacturer supplier in China offering Jr Series Wound Rotor Slip Ring Motor Ball Mill Motor 380kw Jr Series 3 Phase Asynchronous Slip Ring Motors 6kv 10kv Ykk Series 3 Phase High Voltage Air Air Cooling Motor and so on

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CN1718282A High energy ball mill method with plasma aid

Example 1 a the present invention is to achieve a plasma assisted high energy ball milling apparatus comprising a driving motor a ball mill jar 2 frame 3 the base 4 a ball mill jar 2 mounted on the frame 3 which is placed inside balls 5 the frame 3 by the spring 6 is mounted on the base 4 which is provided outside the excitation block

Soft Start For Ball Mill Appliion LMPForum

Mar 25 2007 nbsp 0183 32Soft Start For Ball Mill Appliion posted in Soft Starters Hello All I have a customer who is manufacturing ball mills for chemical industry He is interested to install Softstarter or VFD for the motor but is apprehensive about whether it can do the job of starting the mill

Ball mills design and operating principle Strommashina

Ball mills design and operating principle The Samara Strommashina plant has been manufacturing ball mills since the middle of the twentieth century Hundreds of mills of most diverse modifications have been manufactured over 70 years of the plant operation

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ball mill for ore ginding The Computer Aided Design CAD files and all associated content posted to this website are created uploaded managed and owned by third party users

Large Diameter SAG Mills Need large Diameter Ball Mills

as sag mills up to 40 ft in diameter drawing 18 MW Ball mill data sets Observed vs Predicted Ball Mill Power Draw motor input Large Diameter SAG Mills Need large Diameter Ball Mills

1000 HP Synchronous Motor Electric motors amp generators

Jun 16 2004 nbsp 0183 32I have a Synchronous Motor coupled to a Ball Mill by clutch It starts uncoupled and after it synchronizes the clutch engages the load 180 coils 40 poles 1 5 coils per group 2 circuits wye Lap winding We cut out 2 coils each loed in different phases The motor work with unbalanced phases for around 40 days and did not show

PDF Grinding in Ball Mills Modeling and Process Control

Grinding in Ball Mills Modeling and Process Control synchronous motors equipped with an air cl utch or gear transmission After the mill 40 The process control in a ball mill grinding

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Autogenous mills semi autogenous mills and ball mills for wet grinding A company of Polysius ball mills 4 Motor power at 35 ball charge The standard range of medium size of motor stator and motor poles which are attached to the mill shell Drive motors In the case of ring gear drives

LOESCHE MILLS

The Loesche coal grinding mill range is divided into two serial types Small twin mills constructed to individual specifications LM 12 2 D to LM 20 2 D with table diameters from 1 200 to 2 000 mm Larger mills with two three and four rollers and modular struc tures LM 21 2 D to LM 43 4 D with table diameters from 2 100 to 4 300 mm

Ball mill Ball Mill Price Ball Mill for Sale

Ball mill is the key equipment for re crushing the materials after they are primarily crushed Ball mill is widely used for the dry type or wet type grinding of all kinds of ores and other grindable materials in cement silicate product new building material refractory fertilizer black and non ferrous metals and glass ceramic industry

Ball Mill Design Power Calculation

A motor with around 1400 Horse Power is calculated needed for the designed task Now we much select a Ball Mill that will draw this power The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution The following shows how the size or select the matching mill required to

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