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  • Oct 12 2017 0183 32 SAG mill make use of steel balls included with some large and hard rocks for grinding These mills utilize the balls in making the large fragments of materials broken into piec The ball charge of a SAG mill is about 9 to 20 This process takes place inside the large rotating drum of SAG mill which is filled with balls partially...

  • mill Impact Abrasion and Attrition Hay 3 tipos distintos de fractura en los molino AG y SAG Impacto Abrasión y Desgaste MetSMART is unique in that unlike other simulation software it does not require inputs from expensive proprietary hardness testwork With MetSMART the user has the flexibility to choose the testwork they wish...

  • Mill throughput is a key driver for maintaining profitability at Mt Keith because of the low head grade 05 Ni and inherently low nickel recoveries due to the mineralogical makeup of the ore The Nickel West Mt Keith Concentrator NMK has 2 parallel grinding modules consisting of one SAG Mill and one BALL Mill per module...

  • Jul 30 2015 0183 32 The installation pictured below consists of 2x 4 inch Turtle Tough Extreme IR windows and visual viewports installed on the SAG Mill LRS electrical panel Turtle Tough This is a critical piece of infrastructure to keep the MILL running and is under extreme load and environmental conditions...

  • 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...

  • In fact the rotor of the ring motor is the mill itself and the stator is built around the mill Liquid Resistor Starter LRS are containing agitated mechanical parts requiring Speed variation of the ball mill avoids over grinding and affecting down...

  • When coupled with purpose-built SAG Mill starting Liquid Resistance Starters LRS the exclusive benefit of Hot Redundancy is available In the unlikely event the SER fails the system will transfer control to the LRS units until the SER is reset...

  • Los molinos SAG también son una solución óptima para la molienda en húmedo ya que la trituración y el cribado en estos casos pueden ser difíciles si no imposibl Eficiencia mediante operación automática Los ingenieros de proceso de lo ayudarán a crear un proceso eficiente basado en softwares desde el diseño del circuito...

  • Sep 17 2013 0183 32 Advantages of the wound rotor/SER drive are 1 If the SER converter drive fails the drive can be switched to fixed speed bypass - starting the usual way with the LRS 2 The converter only needs to be sized for 15-20 of the total motor rating with associated reduction in floor...

  • The motors are not described in detail but the paper does mention a problem with SER which usually stands for slip energy recovery suggesting that the SAG mill uses a gear drive with an induction motor Assume that the ball mill also has an induction motor with gear drive so for both mills use 097 for mechanical efficiency between the...

  • Oversize from the trommel screen scats is directed to the scats recycle conveyor for return on to the SAG mill feed conveyor The 55m diameter by 838m EGL rubber lined ball mill is fitted with a 4 300 kW wound rotor induction motor LRS trommel screen and retractable feed spout/chute...

  • A very basic overview but the advantage of wound rotor slip ring motor is that through a LRS u can vary the resistance of the rotor The advantages are 1 able to manipulate the torque speed curve allowing u start with a much higher torque Wound motors are suitable for application with heavy starting duties such as ball/sag mills crushers etc...

  • The method of powering mills such as AG SAG and Ball has a Fixed speed drives with wound rotor motors or synchronous machines were the Liquid Resistor Starter LRS are containing agitated mechanical parts requiring...

  • 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 was due to the limitation of gear manufacturers not having access to larger single piece special alloy castings To the benefit of...

  • The breakage rate function shape of the SAG mill is largely governed by the mill load particle size distribution and mill speed The feed in the mill contains fractions of ore that serves as the grinding media Larger ore fractions break the smaller particles but also breakdown themselves and exit the mill...

  • 2 Supervision of the LRS start-up system of the SAG Mill 3 Supervision of the SER DRIVE drive of the SAG Mill 4 Monitoring of high voltage power lines 5 Electrical measurements in order to locate and detect faults on the power system 6 Application of security procedures SOP related to...

  • Dec 19 2014 0183 32 Advantages of the wound rotor/SER drive are If the SER converter drive fails the drive can be switched to fixed speed bypass - starting the usual way with the LRS The converter only needs to be sized for 15-20 of the total motor rating with associated reduction in floor space air-conditioning etc...

  • Advantages of the wound rotor/SER drive are 1 If the SER converter drive fails the drive can be switched to fixed speed bypass - starting the usual way with the LRS 2 The converter only needs to be sized for 15-20 of the total motor rating with associated reduction in floor space air-conditioning etc...

  • Feb 01 2016 0183 32 This mill was developed by Loveday and Hinde 2002 to calibrate and test an abrasion based AG/SAG model Loveday and Whiten 2004 This mill has been used because it provides for rapid removal of progeny as they are generated via slots at the base of the front of each lifter...

  • Electrolytic starter LRS for slipring motors from 550 to 20 000 kW EPM electrolytic starter can be used to start slipring motors from 500 kW to 20 000 kW It will supply the power necessary to drive the motor by resistance variation Smooth progressive acceleration Wide range of applications Rugged and reliable Customised for each application...

  • starting with the modeling of the SAG mill performance based on the Axb t / kWh and the granulometric curve of input to the mill For the characterization of the feeding a representative measure of the thick and thin area of the curve was taken being represented by the F80 and 125...

  • May 02 2017 0183 32 Dear all I am Graduate Control System Engineer for a processing mining plant at the moment as my background is Electrical Engineering here we ve got a SAG mill that its speed is being controlled by Slip ring Energy Recovery SER system with the motor speed range is 85-105 my question is how the SER adjust the speed in this range which parameter perform to rotor to revolving...

  • PDF On Jan 1 2011 M Powell and others published A structured approach to modelling SAG mill liner wear - monitoring wear Find read and cite all the research you need on ResearchGate...

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