Grinding Maintenance Brochure by Workforce South Pacific ...

Jan 12, 2015· SAG mill feed size distribution – we work with clients to ensure mill ball to rock ratio and ball size can be compensated to counter lack of coarse breakage in high competency ores, to improve ...

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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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Leading in grinding mill technology

Aug 26, 2005· Discussing this new range of products, Calver explains that the Impactmeter (patent pending) is an acoustical instrument developed for the purpose of monitoring impacts inside a …

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INTELLIGENT GEARING SYSTEM – SOLUTION TO …

The mill drive system consists of the main mill motor, the main reduction gear box, mill pinion and girth gear. The mill is also equipped with a barring drive which is either connected to the main drive reduction unit or alternatively mounted at the back of the main motor. Refer to Figure 2 …

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Sag Milling | Mill (Grinding) | Mining

Table 3 - Effect of Feed Size on Primary Mill Capacity SAG Mill Net Milling Rate SAG Mill Pinion Power F80 SAG Mill T80 SAG Power from F80 to T80 Operating Work Index Source Data: Placer Dome Asia Pacific. tph kW mm um kWh/t kWh/t. Secondary Crush 860 3793 23.6 2880 4.41 36.4. Primary Crush 570 4255 90.6 1650 7.46 35.0

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On-line Vibration Monitoring System Improves Fault Detection

Jan 07, 2020· On this site, the most critical was the semi-autogenous grinding (SAG) mill, which runs 24/7 with a full load. At the moment, because the life of the mine is limited, they are running at full production, occasionally overloading the mill. When the mill stops, the production cannot be recovered, and it is the only mill on the site.

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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 …

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Update On JHEP SAG Mill Drive Selection | PDF | Gear ...

All parameters above are good for a 22.5MW to 24MW dual pinion SAG mill drive. Changes to AGMA standard have revitalised the large gear cutting industry and soon a machine shop in Holland will be able to fabricate gears of the following parameters: 20 meters in diameter = 65.6 feet 1.5 meters in face width 400 tonnes of machined weight.

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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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First Majestic Silver (SAG Mill) Company Profile ...

First Majestic Silver (SAG Mill) General Information Description. A semi-autogenous grinding (SAG) mill in Nicaragua. The asset has a mill diameter of 24 feet and an effective grinding length (EGL) of 18.5 feet and features a mill shell fabricated in eight 90-degree segments, mill heads cast in four 90-degree segments with demountable trunnions, ductile ring gear and carbonized pinion shafts ...

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1 x Metso SAG Mill & Siemens Motor

1 x Metso SAG Mill & Siemens Motor For Sale/Re-Assignment Mill Details Type of Mill Metso 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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1 - Maintenance

Basically they support equipments like motor, reducer gears, pinion drive blocks and mills with girth gears. A portion of Sag mill foundation is a wall almost 10m x 2m x 8.2m in height. It is coupled with mill foundation system consisting of four wall columns braced by …

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Minding the Grind: Maintenance Options to Keep SAG Mills ...

Minding the Grind: Maintenance Options to Keep SAG Mills Turning. Purpose-built structures such as the Skyway system from Russell Mineral Equipment can provide a stable, safe and efficient platform for mill liner bolt removal when compared with the common approach of hanging jackhammers and impact wrenches from a chain hoist.

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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 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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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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Keeping an eye out for grinding mill dropped charge and ...

Nov 06, 2019· For example, a large 24 foot (7.3 m) diameter ball mill charge typically weighs around 2 million lbs (907 tons). Even though Semi Autogenous Grinding (SAG) and Autogenous Grinding (AG) mill charges contains less balls and no steel balls respectively, their …

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Mill Pinion Failure Modes - mayukhportfolio.co.in

Sag Mill Pinion Failure Modes-India Crusher&Mill. sag mill pinion failure modes; Water Words Glossary - NALMS - North American Lake Management ... A water right which has not been put to Beneficial Use for generally ...

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Noise Monitoring That Prevents Mill Damage | Brüel & Kjær

Noise Monitoring for Optimal Mill Operation. Mining companies around the world continue to face the challenge of increasing productivity and reducing downtime. As part of its SAG mill control system, Manta Controls developed the Manta Mic: a robust and …

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rod Mill Girth Gear and ball mill girth gear and sag mill ...

High quality rod Mill Girth Gear and ball mill girth gear and sag mill girth gear for sale from China, China's leading Oxidized Pellet Mill Girth Gear product, with strict quality control GS42CrMo4 ball mill Ring Gear factories, producing high quality HRC55 Mill Girth Gear products.

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Sag Mill Pinion Failure Modes - subway42736.pl

sag mill pinion failure modes - ndamu-guesthouse.co.zasag mill pinion failure modes Introduction. Global Physical Asset Management, Inc. – Mine Connect . We pro

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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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Trunnion Bearing Assembly Ball Mill & Rod Mill

Jul 28, 2015· Ball Mill PINION SHAFT BEARINGS. Pinion shaft bearings are of the SKF anti-friction type mounted in a common twin bearing assembly. Bearings are fixed in place so that the pinion shaft of the mill is always in alignment with the drive components. V-belt driven mills are furnished with an outboard bearing of similar construction.

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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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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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OPERATION AND MAINTENANCE OF CRUSHER HOUSE …

consist of a crusher followed by a SAG mill followed by a ball mill. In this context, the SAG ... rod gates and rack and pinion gates is provided before screens to permit ... dependent material damage mechanism such as fatigue, corrosion, erosion, etc. 453

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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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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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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 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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Solutions for the 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. Configured in a twin motor arrangement, the motors share load in the tandem mill. The Customer Need

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Power-based modelling of single-stage AG and SAG mill …

The SGI equation uses a transfer size between a SAG and ball mill; it is proposed that a synthetic transfer size of 2100 µm be used to model single-stage SAG mills. 5.9ˇ √˙˝ ˛ . ˚ 0.96 0.985˜ !"# ˝ $ ˝ √˙˝ %&'() (2) where: SGI is the SAG Grindability Index, minutes, P80 is the SAG hydrocyclone overflow 80% passing size, µm

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Used Sag-mills For Sale - amking.com

Inventory ID: 6C-HM03. UNUSED FLSMIDTH 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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How to do weekly predictive maintenance on gears to ...

Jun 16, 2020· Stop action photographs girth gear photographs are an excellent predictive maintenance task that every site can employ without shutting down critical mills, kilns, or dryers. When taken at regular weekly intervals, changes in mill set operation and condition can quickly be identified. What failure modes can I detect with this method? Misalignment Wear Macropitting Scuffing […]

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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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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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Mill Pinion Gears - dbsantasalo.com

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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Pinion Shaft For Mining Grinding Mill-HENGIN

Pinion Shaft is the key component in the transmission system of the mill, especially the large-scale SAG mill, AG mill and ball mill. It has strict requirements for material and manufacturing, complex process flow and high precision. Therefore, the selection, technology and manufacture of pinion shaft reflect a certain industrial level.

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