Autogenous and Semi-Autogenous Mills | FL

Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

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HD Technologies Case Study: Ball Mill Bearing Damage - CBM ...

Sep 11, 2019· The subject of this case study is the NDE (non-drive end) Pinion Bearing of Ball Mill No 8 in the Mill Dpt. in the flotation plant. The bearings on the pinion are of type 22380YMB. SPM HD Spectrum from the NDE bearing shows a clear match of the BPFO (Ball Pass Frequency Outer Race) symptom. According to the customer, following the indications ...

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Ball Mills and Sag Mill problem | AMP Maintenance Forums

Nov 21, 2007· We have two Ball Mills and one Sag Mill. We had some visual inspection on pinion and ring gears, during these inspections we found some abnormal wear on this gears (pictures show this problem in enclosure). After that we decided to do some tests as vibration and oil analysis. Result of the vibration and oil analysis tests are as a below:

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Purchase of New SAG Mill from First Majestic Silver Corp

Mar 15, 2021· Highlights. Condor purchases a complete new SAG Mill package for approximately US$6.5 million. US$3.0 million worth of Consideration Shares is to be issued immediately at a price of 50 pence per Consideration Share to First Majestic as part consideration. The balance of approximately US$3.5 million to be paid in cash over the next 3-4 months.

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Grinding Mills - an overview | ScienceDirect Topics

SAG mill product feeds two parallel ball mills of 6.6 m×11.1 m (internal diameter×length), each with a 9.7 MW twin pinion drive. The ball mills are operated at a ball charge volume of 30–32% and 78.5% critical speed. The SAG mill trommel undersize is combined with the ball mills' discharge and pumped to two parallel packs (clusters) of ...

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How to Prevent Pinion Damage in Ball Mill in Advance-FTM ...

How to Prevent Pinion Damage in Ball Mill in Advance. Ball mill is one of the main equipment in ore dressing operation. In the course of operation, the pinion of the ball mill will break, which will lead to insufficient and unqualified pulp in subsequent production workshops.

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efffective condition monitoring for sag mill

2019/07/15 · SKF supplies mill pinion assemblies for a SAG mill in Russia 2019 July 15 09 44 Africa SKF supplied locally manufactured mill pinion assemblies including in-house designed bearing housings as well as a Taconite sealing solution to a longstanding customer in the local grinding mill sector intended for a 22x14 ft. SAG mill at a gold ...

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Drive Solutions for the Global Mining Industry

drive application is a dual-pinion SAG mill driven by two 5,000 kW wound rotor induction motors (WRIM). Two TMdrive-10SPRs control motor speed by recovering rotor current and returning the power to the utility supply. Conﬁ gured in a twin motor arrangement, the motors share load in the tandem mill. The Customer Need

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Failure Modes Of Grinding Mills

Sag Mill Pinion Failure Modes. Drive standard of Kennicott SAG mill with double pinion and single ft SAG mill. Failure mode SAG mill and ball mill drive fault sag mill pinion failure. The drive mill is caused by the failure of the pinion. During the drive test run, the pinion failed. Mill installation. Diameter reading of SAG mill.

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Sag Mill Maintenance - WOMP

Improvements in SAG mill components such as bearings, liners and even nuts and bolts also help operators achieve higher availability levels by extending the intervals between stoppages for routine repairs and replacement. ..., broken teeth or even complete failure of the gear and pinion. ... An FEA evaluation determines if a worn component is ...

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Ring-geared mill drives - Grinding | ABB

Mill load sharing – Maintains equal torques on dual pinion mills throughout the whole speed range. Controlled rollback – Prevents backlash and reduces downtime. Mill power ride through – Keeps the mill operating even under voltage dips. Over-duty cycle – Avoids unexpected downtime if the mill …

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Cadia Girth Gear Failures

Sep 22, 2014· The gears and pinions on the Cadia ball mill gears failed due to a design fault. We agree with [2] that a larger pinion may have avoided the gear scoring, however, the location of the damage can only be explained by thermal ratcheting resulting in differential expansion. The damage to both the loaded and unloaded flanks of the girth gear are ...

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BALL MILL GEARBOX PROBLEM - Vibration

Our Ball Mill has the following tooth counts: Pinion 18 teeth 1 x 2 x 3 x 3 Bull 226 teeth 1 x 2 x 113 (113 is prime). Thus, the factor common to both of these gears is 2 (improper set). Since we have a common factor other than one between the two gears on the ball mill we …

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Used Sag-mills For Sale - amking.com

Inventory ID: 6C-HM03. UNUSED FL 36' x 24' Dual Pinion SAG Mill with 2 ABB 9,000 kW (12,069 HP) Motors for Total Power of 18,000 kW (24,138 HP)

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Sag Mill Pinion Damage - arbeitsvertrag-stuttgart.de

Sag Mill Pinion Damage. Ball Mill Gear Alignment. In 1998 girth gear damage of a SAG mill at a mine in Western semi-autogenous mill or SAG and ball mill in series. Contact Supplier RAM Enterprise - RAM Enterprise Inc. . installation twin pinion sag mill Crusher Machine For …

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gears andpinion for ball mill

Vector Ball Mill Pinion - istitutobianchi. Mill Pinion Gears Our high torque, high precision integral and non-integral mill pinions are used in SAG, horizontal ball mill and rotary kiln applications across the globe Supplied as an individual component or as a fully optimised system comprising a girth gear, mill drive gearbox, pinion and barring drive, our pinions are manufactured

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Alphatec Egnineering SL - SAG mill complete foundation ...

This white paper focuses on the work carried out by Alphatec Engineering in the rehabilitation of the mounting system (concrete foundation, anchoring, and grout) of a pinion-bearing pedestal of an 8,5 m ø x 3,8 m semi-autogenous grinding mill (SAG mill) driven by a 4000 kW electric motor. The project was part of a major intervention at two ...

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sag mill under frequency - capeatlanticdistrictumw.org

Noise Monitoring That Prevents Mill Damage Brüel Kjær. So now we are able to listen to any SAG or AG mill and measure the entire frequency spectrum live from a Type 2250 or a Type 2270 and pass the entire frequency spectrum directly into a control system …

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sag mill s removal magnet - artsolariskbentreprise.be

SAG mill product feeds two parallel ball mills of 6.6 m×11.1 m (internal diameter×length), each with a 9.7 MW twin pinion drive. The ball mills are operated at a ball charge volume of 30–32% and 78.5% critical speed. The SAG mill trommel undersize is combined with the ball mills' discharge and pumped to two parallel packs (clusters) of ...

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Communition Simulation using Discrete Element method …

The mill configuration, in Figure 7, represents a typical 10.4m diameter (34-foot) SAG mill. The image is taken after a representative amount of ore is broken to illustrate key behaviors. Ore breakage rates, dependent on lifter and ore geometry, are noted. Comparative energy used to achieve these relative breakage rates is also noted.

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SAG mill Archives - International Mining

The SAG mill agreement has come about as First Majestic ordered a complete new SAG mill package, which, Condor says, is now superfluous to its requirements. The SAG mill has a mill diameter of 24 ft (7.3 m) and an effective grinding length of 18.5 ft and a structural charge mass of 315 t, …

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Sag Mill Pinion Failure - mayukhportfolio.co.in

Damage to mill cylinder, neck or stub endanger girth gear and pinion. Repairs entail .... or not at all. Moreover the elastic mill sag in hot or cold condition can vary, depend- .... lubrication break-down, faulty switching, failure to adapt the adjust-. Read more

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grinding mill failure modes - Felona

Mill Pinion Failure Modes mayukhportfolioco. ball mill torque dual pinion failure Inching drives in Single or dual pinions driving the ing gear r • Mill of the mill gear in norm ng mode 2 x main drive Read more Reducing the fatigue life of a girth gear girth gear driving a ball mill The failure mode is typical of other types of horizontal ...

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sag mill installation manual

how sag and ball mills are desmaunted and rearrange in. Sag Mill Pinion Failure Following the S mill will be two 9 000hp ball mills each one 20ft in diam Pinion tooth surfaces were machined to a 32 min finish and Read more installation twin pinion sag mill Rock Crusher For Sale S Mill Pinion Energy kWh/t = Revs x 16000 g / 4473g 1 benchmark testing at In the extreme gear and pinion failure ...

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(PDF) Optimisation of the Sossego SAG mill | Mauricio ...

SAG mill throughput as a function of grate open area As shown in Figure 2 the grate open area has a strong effect on Sossego SAG mill throughput. The nominal capacity of the circuit should be achieved with a combination of 13.5% ball charge and 10.8% open area with 3 and 3.5 inch apertures.

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Semi-autogenous grinding (SAG) mill liner design and ...

reduce packing and ball/liner damage, and to use larger, hence fewer, mill liner parts to reduce downtime at liner change-outs. Key words: Comminution, Grinding, SAG mill, Mill liners Paper number MMP-07-002. Original manuscript submitted online January 2007. Revised manuscript accepted for publica-tion April 2007.

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SKF Performance Contracts for Horizontal Grinding Mills

The SKF IMx-S condition monitoring system was set up and configured with appropriate alarm thresholds. After monitoring the SAG mill for just under three months, warning signs appeared in the data. An analysis of a waterfall diagram showed that sidebands had developed around the input pinion gear frequency, indicative of the wear on the gears.

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What's the Difference Between Ball Mill, Rod Mill and SAG ...

Mar 20, 2020· SAG mill: When the weight of ... Equipped with rack and pinion structure. The operating handle is far away from the barrel. / ... Rod mill: In order to prevent the damage caused by overcrushing, the rod mill is often used for production and processing before gravity concentration or magnetic separation plant.

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Ball mill torque dual pinion failure - Manufacturer Of ...

Dual pinion sag mill huisarts vansichemnl. Ball Mill Failure Modes stundengebet SAG mill, ball mill, ring gear, dual pinion, drive systems, variable Chat With Sal Chat With Sal ball mill failure modes OptonClinic Ball Mill Ball mills are used primary for single stage fine grinding, regrinding, and as the second stage in two stage grinding circuits According to the need of Chat

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sag mill s removal magnet

SAG mill product feeds two parallel ball mills of 6.6 m×11.1 m (internal diameter×length), each with a 9.7 MW twin pinion drive. The ball mills are operated at a ball charge volume of 30–32% and 78.5% critical speed. The SAG mill trommel undersize is combined with the ball mills' discharge and pumped to two parallel packs (clusters) of ...

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damage happen in mill crusher - grelck-kaminholz.de

Sag Mill Pebble Crushersag Mill Pinion Damage. Maximizing Throughput On Sag Mill Crusher maximizing throughput on sag mill crusher machine through the addition sag mill a raptor 900 pebble crusher sag and ball Damage Happen In Ball Mill . Chat Now ; …

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Successful Design of the NICO Grinding Circuit for ...

Jan 19, 2021· And whether the total pinion energy (SAG plus ball mill) was sorted by increasing SAG, or by increasing total pinion energy, the result was the same. Taking design numbers from this analysis shows that to grind to a T80 of 1.7mm (from 152mm F80) in a SAG mill will require 29.5 kWh/t in the SAG mill. When ball mill grinding is added,

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Grinding Mill Gear Assembly - Mineral Processing & …

Jul 28, 2015· By mill we refer to Ball Mills, Rod Mills and SAG Mills. Anything gear and pinion really. The discharge end of the mill; For the operator this only becomes a problem should the bolts that hold the liners in begin to leak water and ground rock. This combination is called SLURRY.

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Energy Benchmarking - SMC Testing

SAG mill power draw at pinion: 18583 kW. Ball mill power draw at pinion: 16811 kW. Pebble crusher net power draw: 530 kW. The total milling circuit specific energy and pebble crushing specific energy is therefore given by: Total milling specific energy at pinion: 21.63 kWh/tonne.

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(PDF) SINGLE STAGE SAG/AG MILLING DESIGN SINGLE STAGE SAG …

The SAG mill was also designed with a high maximum ball charge (18%) so that sufficient media was provided when 9 treating incompetent ore. At the proposed ball charge levels, the use of extremely high mill speeds would not have been possible without damage to the mill lining.

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GROSS POWER CALCULATOR - SMC Testing

Ball Mill AG/SAG Mill min max min max DESIGN DATA diameter inside shell (m) 0.9 7.9 1.8 12.2 belly length inside liners (m) 1.5 12.2 0.5 9.6 liner thickness (mm) 51 152 51 152 diameter inside shell (ft) 3 26 6 40 belly length inside liners (ft) 5 40 1.5 31.5 liner thickness (inch) 2 6 2 6

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Girth Gear Sag Mill Commissioning

The resulting mill design was 6.1m dia x 9.05 EGL SAG Mill with a 5.2MW Wound ... with an identical structure, trunnion bearings, girth gear, pinion and pinion bearings. ... Final commissioning of Kansanshi's 12MW SAG and 5.8MW Ball mills...

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Smooth Operators

The clutch's primary role on the dual-pinion, direct-drive geared mill is to provide smooth starts during mill startup. When the mill is running, the clutch also serves as a torque "circuit breaker," reducing costly repairs and downtime by protecting the pinions and ring gear from potential damage caused by large pieces of grinding material.

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ENGINEERING STANDARD SPECIFICATION Ontario

Clarabelle Mill SAG, Rod & Ball Mill Pinion Gear Thermal Acceptance Criteria General Industry Acceptance Guidelines for this size and gearset is as follows:* A. 25 degree Celsius differential across the teeth of the pinion face will most likely result in premature wear and …

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Mill drives: the desire for increased power and the ...

design mill speed, and the maximum design ball charge volume (Barratt, 1989). For single pinion and dual pinion drives, with 21 MW now a distinct possibility, the probability of pinion changes to a higher mill speed should always be considered when set-ting …

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