Sag Mill Pinion Damage
SAG Milling in Australia -Revised Submission
The Ernest Henry SAG mill (11 MW) is currently the largest twin pinion single drive mill installed in Australia. Problems have been experienced with the twin pinion drive at Fimiston and with the ring motor at Cadia. At Cadia, excessive vibration and deflections in the drive stator were encountered during commissioning of the mill and later ...
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 pitting. (serious, shutdown and inspect).
What's the Difference Between Ball Mill, Rod Mill and SAG ...
The grinding circuit consists of a SAG mill and two ball mills, all dual pinion gear driven. Copper . 3 Mountain has selected the state-of-the-art dual pinion mill drive systems, providing numerous ... a short circuit on the motor terminals that could cause severe damage to the gear, pinions, bearings and mill.
crown pinion alignment ball mills - SRE Machineries
Align Ball Mill Pinion Gears Vetura Mining machine. Ball Mill Pinion Alignment Sugar Smith Cakes May 10 2017 align ball mill pinion gears as a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any size get price cement mill alignment 10 may 2017 cr4 thread ball mill girth gear and pinion with all due …
Home - GearTec AG (Englisch)
On August 19 th, 2021, the test run for a SAG mill gearbox of the type MS135B06/01 was successfully carried out.Our gearbox, for a SAG mill 5.5 x 2.5 m, replaces an old gearbox of the type D2PSF90 from the manufacturer "moventas". All connection and fitting dimensions have been retained so that a simple 1:1 exchange on site is possible.
SKF
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 project in Russia.
reasons for ball mill bearings failure
Overview on the grinding mills and their dual pinion mill drives mill and two 24' x 39.5' ball mills will be briefly discussed. .... on the motor terminals that could cause severe damage to the gear, pinions, ... A SAG Mill Control: ...
Ball Mill Maintenance & Installation Procedure
The mill gear should be lifted by the pinion causing a downward pressure on the pinion shaft bearing. Mills are made either right or left "hand". There are two methods of identifying the "hand" of the mill. When standing at the feed end of the mill, and facing the mill, if the mill rotates clockwise, it is a right hand mill.
Smooth Operators: Wichita multi-plate clutch technology
High-speed motor > gear reducer > clutch > pinion Due to their respective functionality, ball and SAG mills each have different torque overload requirements. For example, the torque overload capacity requirement for a ball mill is 200%. A SAG mill requirement might be 225-250% torque based on Full Load Motor Torque (FLMT).
Sag Mill Syncronis Motor high axial vibration non drive ...
The Pinion drives the Mill through a large girth gear. The pinion has 21 teeth and the girth gear has 376 teeth. ... Re install locking device or a new one if any sign of damage Set motor rotor on mag center and set the locking device ... When the Sag Mill was in operation the clutch operation just did not look ok and pad wear was uneven.
Ring gear drives huge grinding mill | Machine Design
The largest ringmotor- driven mill in the world is a 36-ft diam., 16,000-hp SAG mill that processes up to 2,000 tons of ore per hour. Located at Kennecott Utah Copper near Salt Lake, this mill ...
Mining - Grinding and Processing | WEG
Grinding and processing. WEG offers the most reliable and efficient solutions for milling plants for ferrous and non-ferrous products with their experience of mill drive systems. In the heart of a processing plant, the ball and SAG mills must be driven by solutions that adapt to the characteristics of the minerals in line with the whole process.
2-2 Lime Kiln Principles And Operations
and pinion drives a main gear attached to the kiln. Typically the kiln is driven at speeds of 0.5 to 2 RPM, often with variable speed arrangements. Typical transit times for the lime through the kiln are from 1.5 hours to 4 hours under normal operating conditions. This is …
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 ...
Mineral Processing | Mill (Grinding) | Industries
Ball mill : Takes the product from a rod mill or AG/SAG circuit (typical particle size of 0.5 cm and finer) grinds it to a finer size (0.1 cm or finer) usually final size. usually connected to a classifier to form a closed circuit - coarse particles are recycled to the mill for further grinding
Detection of Pillow Block Bearings Defect Using Infrared ...
2.SAG mill Golgohar mineral and industrial company has three processing line of iron ore concentrate and there is a semi-auto genius mill (dry mill) with power 3 Mw in each one. These mills are categorized as vital equipment and any problem of them could lead to processing line down time. Figure 1 shows Schematic view of dry mill.
Grinding Maintenance Brochure by Workforce South Pacific ...
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 ...
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
Girth Gear RCFA's - CR4 Discussion Thread
ROM SAG Mill. Mill Type . Grate discharge, dry grinding, ball mill. Construction . The mill is constructed from a fabricated shell, bolted by. Means of flanges to cast steel ends with integral. trunnions which are supported on hydrodynamic white. Metal bearings. Drive . The mill is driven by a high-speed electric motor via a. Gearbox, pinion ...
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, Condor Gold said.
Ball mill high vibs | AMP Maintenance Forums
Hi Observing high vibs on pressing and lifting pinion DE and NDE bearing on a ball mill. Motor and main GB drive are OK. Clear predominant gear mesh frequency is appearing in the spectrum along with harmonics and side bands. But 1st GMF is predominant. side bands with pinion speed is seen. no GG speed side band was observed Some of the vib data, spectrums and photos …
Horsburgh & Scott Gear Up
Horsburgh & Scott identified an input worm gear pinion and worm gear that were out of alignment during operation. Horsburgh & Scott's Field Service Team performed a tear down of the input pinion to identify the root cause of failure. They determined the root cause was the bearing orientation allowing for shaft movement.
Gold Seeker Issue #90 ~ This Week In Mining: Earnings ...
Production at Yaramoko was below plan for the quarter, and unplanned downtime due to the premature changeout of a SAG mill pinion bearing in August contributed to lower mill throughput. Further, resequencing of production stopes at the 55 Zone, due to isolated ground conditions causing bridging, which resulted in a reprioritization of lower ...
Grinding mill upgrades - Outotec
A locked charge detection system can be used to prevent a dropped charge and structural damage to your mill. Our retrofit includes a pinion shaft encoder that measures mill velocity and position at start-up, as well as a control panel with a program logic to disengage the clutch when a locked charge is detected.
Grinding Circuit - 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 ...
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 gear ratios, service factors, and motor power ratings.
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
Gearbox Typical Failure Modes, Detection and Mitigation ...
Damage Records Bearings . Gears : Others : Planetary ; 44 ; 23 . 21 ; IMS . N/A ; 34 . 9 ; 47 . HSS ; N/A . 123 ; Total . 257 ; 180 . 68 ; 9 . Typical Failure Modes . 7 A Representative Configuration . 7 Annulus Planet Sun Gear Gear Pinion Pinion Low-Speed Stage High-Speed Stage Intermediate-Speed Stage Low-Speed Shaft Intermediate-Speed Shaft ...