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Although speed variation on mill applications is not as critical as in other applications the ability to vary the speed does provide added benefit for controlling the process Making use of traditional slipring motors in conjunction with a LRS can offer the ability to vary the speed of the mill between 50 and 100 of the rated speed This is

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· Dear all kindly suggest for a suitable starter to start a ball mill with 2600 kw 1000 rpm 11 kv slipring induction motor has any latest technology invented to start the motor other than LRS

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Grinding amp Classification Circuits the common ones are WRIM LRS SER From this discussion I think that for a variable speed Ball Mill I should just

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The Slip Energy Recovery Drive S E R Drive is a technology well proven in the industry for large power motoring systems that allows precise motor speed control at the same time that recover the slip energy in the wound rotor induction motors WRIM The typical applications include SAG mill AG mill and ball mill

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The use of VSDs makes it very easy to set the mill speed by just modifying this value on a touchscreen But this is not only an option for new installations In installations where SAG and Ball mills have been working for several years at fixed speed but the speed regulation has been observed to be necessary VSDs can also be integrated very

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Liquid Starters For Ball Mill Electrolytic starter LRS for high power slipring motors EPM electrolytic starter can be used to start slipring motors from 500 to 20 000 kW resistance variation supplying the power necessary to drive the motor also named electrolytic starters or Liquid Resistance Starters LRS use mobile electrolytic resistances

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The mill used for this comparison is a 4 4 meter diameter by 13 6 meter long ball mill with a 5000 HP drive motor It is designed for approximately 90 s ton per hour This type two compartment mill is a state of the art shell supported cement finish mill The torque and time requirements of the mill with the ball

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There are four parallel ball mills each consisting of a 7 9 m x 13 4 m 26 by 44 ball mill with twin 8MW fixed speed motors in closed circuit with twelve 26 inch cyclones Wet screen undersize gravitates to the mill discharge hopper where it is combined with the ball mill discharge and pumped to hydro cyclones for classification

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Although speed variation on mill applications is not as critical as in other applications the ability to vary the speed does provide added benefit for controlling the process Making use of traditional slipring motors in conjunction with a LRS can offer the ability to vary the speed of the mill

Lrs Acronym Ball Mill Cement mill lrs you tubes hat is lrs in ball mill ball mill lrs operationliquid resistant starters on ball mills the early detection of liquid resistance starter the mill safe start was commissioned at both the the sag and the ball mills at lrs for the motor enables get price lrs in cement plant amillthe isamill is a horizontal high speed stirred mill

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EPM Electrolytic starter LRS for slipring motors from 550 to 20 000 kW control of the slip for the ball mills for example Why using a starter for slip ring motors In order to start a slip ring motor the accelerating torque has to be sufficiently higher than the resisting torque

equivalent ball or tower mill The high intensity means short residence times preventing overgrinding and giving a sharp product size distribution IsaMill™ advantages 7 Horizontal Design plug ˚ow design This avoids short circuiting and makes the mill far less sensitive to process disturbances The horizontal design allows the mill

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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 Type Wrap Around included Mill Drive Motor Size 19 400 KW 26 016 hp Variable Speed Drive Yes Max

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The mill had been stored for a number of years and required refurbishment NCP International managed the project as well as the mill conversion from 60Hz to 50Hz including replacement of the main drive motors supply of new pinions The mill is dual drive mill and carries a communal LRS

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Erection itself is simple and a shell supported mill does not require to be from the open circuit secondary crusher the Bond ball mill work index for the LRS – Liquid Resistance Starter SER – Slip Energy Recovery SMTP

Ball Mill Lrs Operation Milling Equipment ball mill lrs operation A class of machinery and equipment that can be used to meet the production requirements of coarse grinding fine grinding and super fine

Ball mills on the other hand as far as process requirements are concerned did not require variable speed However frequency converter based drive systems provide benefits that improve the ball mill operation FIXED SPEED CONFIGURATIONS The key issue to operate a mill

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