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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.
Mill Power Draw Models. The mill power draw models are used to predict how much power will be consumed by a particular type of mill, mill geometry and set of mill operating conditions. This power is transferred to the ore and used to predict the throughput when combined with the specific energy consumption models.
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
COPPER MOUNTAIN: OVERVIEW ON THE GRINDING MILLS AND THEIR DUAL PINION MILL DRIVES ABSTRACT This paper will first give a short overview of the Copper Mountain project in British Columbia, which just has started commercial operation earlier this year. The grinding process with one 34' x 20' SAG
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1. Candelaria 1, 36 ft SAG mill 2. Chuquicamata, 32 ft SAG mill 3. El Teniente, 38 ft SAG mill 4. Cadia, 40 ft SAG mill
Grinding plant with SAG and tube mill for Gold/copper ore grinding in Australia.This is the world's biggest SAG mill equipped with sliding shoe bearing arrangement and COMBIFLEX® drive system (a favourably-priced alternative to the ring motors normally used with SAG mills of this size).
Dec 19, 2014· Advantages of SER drives for SAG mills; Advantages of SER drives for SAG mills. Friday, December 19, 2014 ... starting the usual way with the LRS. ... I expect that this type of drive would be the most common large mill variable speed mill drive in the world's minerals processing industry for the range mentioned above for the last 15 years ...
Starting of the mill is possible by either using two of the 1250kVA sets or one 1250kVA and the 500kVA set. No theoretical analysis had been performed on the system, due to being an existing plant. Commissioning on site involved testing the LRS for the correct resistance to ensure the mill motor would develop ample torque to accelerate the mill.
exhibits many of these aspects. Maintaining the SAG mill weight at the optimum value is critical for achieving maximum grind rate efficiency and mill production (Powell, M.S., van der Westhuizen, A.P., & Mainza, A.N. 2009). However, SAG mill weight is difficult to control as the dynamic response changes as the mill approaches maximum capacity.
SAG Mill Process Control - What do you prefer? Controlling Weight (within a range) by manipulating mill speed and keeping a constant feed rate? ... Grinding & Classification Circuits. ... There are multiple ways to provide variable speed, the common ones are WRIM+LRS+SER or SCIM+VSD, the top of the range is gearless mill drives. Victor Bergman ...
SAG Mill Control: It Shouldn't be that Hard An economically appealing method for improving operations is available without the capital expense — get more out of a mill by applying the advanced control capabilities in the existing plant control system By Andrew Thornton
Sep 20, 2019· The SER delivers 100 per cent of rated (nameplate) motor shaft power at above synchronous speeds, an exclusive benefit of this SER technology. The CSE Uniserve Modern SER Drive is a compact, powerful, multi-functional and reliable addition to other SAG mill control technologies on the market today. Electrical features
Our Modern SER is a compact, powerful, efficient, multi-functional and reliable addition to the SAG Mill control technologies on the market today.
EPM 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. Designed for controlled starting and speed control of large slipring motors in demanding applications ...
meaning of ser on sag mills in How Much Crusher[], ... » photos of sag mills » maintenance of size reduction of hammer mills and plate mills. ... Maintaining & repairing Mills LRS and SER for SAG Mill. Maintaining HT switchgear and transformers. » Learn More. USING THE SMC TEST® TO PREDICT COMMINUTION CIRCUIT PERFORMANCE.
Jan 24, 2008· Se que ball mill es molino de bola, pero no se qué sea un molino de bola ¿Hay alguna otra palabra para describirlo? Entiendo que sag es como una depresión, hendidura o caída debida al peso, pero no se en sí que sea 'sag mill'. También quisiera saber qué es 'tower mill', ya que molino de torre me suena muy literal. Gracias.
Jun 28, 2019· 1.6 x Full load torque, very typical for a ball mill or sag mill as Chris mentioned. The liquid starter simply adds resistance in the rotor during starting toAppliion of Liquid Resistance Starter ...
SAG Mill LRS Control. The Problem Bottle Neck: Hard ore in circuit reducing throughput Major Issue No control of mill rotational speed due to old equipment and no capital expenditure Current System Control System - Mill control power to weight ratio Register for your free account. Login to continue reading ...
Mill throughput is a key driver for maintaining profitability at Mt Keith because of the low head grade (~0.5% 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· Critical Monitoring of SAG Mill Electrical Systems. ... 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.
LOCKED CHARGE STARTS AND YOUR GRINDING MILL Authors: Jeff Belke & Mitch Bertrand ... SAG mill continually pump the finer material out of the mill, lowering the total amount of residual fine ore and thus improving the situation in respect to locked charge starts. ... Test and correctly set VFD or LRS – this prevents the mill starting too fast ...
Oct 10, 2008· In 2003, following a competitive tender, Outotec were awarded the contract to supply Kansanshi with a low aspect SAG mill. Not only did variations in ore type and throughput need to be considered in the mill design, but the design also needed to be flexible enough for future expansions at .
Variable speed was required for the SAG mill. Various options were considered to meet the specified speed range of 65 to 85% of mill critical speed, and the final selection was the IES Hyper-Synchronous drive Slip Energy Recovery (SER), in conjunction with Wound Rotor Induction motors (WRIM).
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