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

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Jun 16 2004 · I 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 which allows users to draw from an almost limitless amount of compute power that is not only affordable by consultants and small

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Mills and GMDs Maarten van de Vijfeijken looks at large larger and the largest units in grinding ore T he gearless motor also called wraparound 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 body becomes the rotor The stator of the

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China Synchronous motor catalog of 3200kw T Series Synchronous Motor for Grinding Miller Synchronous Motor 30 Pole Electric Motor 6000V IC01 Motor provided by China manufacturer Shanghai Pinnxun Electric Motor Co Ltd page3

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Ball mills on the other hand as far as process requirements are speed motors with 30 to 40 poles is the compactness of the motor transportation of the equipment on site Motor Figure 6 Arrangement drawing of high speed solution Figure 7 Arrangement drawing of low speed solution

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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

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The ball mill is a tumbling mill that uses steel balls as the grinding media The length of the cylindrical shell is usually 1–1 5 times the shell diameter Figure 8 11 The feed can be dry with less than 3 moisture to minimize ball coating or slurry containing 20–40 water by weight

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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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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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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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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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Our GMD eliminates all mechanical components of a conventional mill drive system such as ring gear pinion gearbox coupling motor shaft and motor bearings By mounting the rotor poles directly onto the mill the mill itself becomes the rotor of the gearless motor

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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

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Mar 09 2016 · Hi All I am planning to build a ball mill due to its high price A ball mill is a device to grinder any media Only induction motor achieves long life A motor with 2 or 4 pole pairs 1500 or 750 rpm 50 Hz with pulley drive seems to be a straightforward solution 40 5 mr byte31 View Forum Posts Private Message View Blog Entries

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Ball mills are commonly used in the manufacture of Portland cement and finer grinding stages of mineral processing one example being the Sepro tyre drive Grinding Mill Industrial ball mills can be as large as 8 5 m 28 ft in diameter with a 22 MW motor drawing approximately 0 0011 of the total world s power see List of countries by

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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

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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

When it Comes to Mining Bigger is Best

been well established over the past 40 years with the benefits increasing exponentially as the mills get bigger In the GMD solution the drum of the mill forms the rotor of the motor with the motor poles mounted along the external circumference of the drum Fig 5 The stator is mounted around the pole assembly The operation is

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

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