To predict the power of the SAG mill, Hoseinian et al ... and the thermal analysis was performed by thermal imaging of the surface of the mill pinion using a thermovision camera. ... The thermography of bearing housing was carried out using FLIR E-60 infrared imaging camera with the thermal sensitivity of less than 0.05 °C and with temperature ...
PROJECTS EXECUTED BY MONTY PRESTIGE ENGINEERING AND CONSULTANCY LIMITED. NEWMONT GOLD GHANA LIMITED (NGGL) AHAFO MINE SITE. Injection of stratathane into the horizontal flange of the Ahafo Ball Mill and the change out of Sag Mill right hand side (RHS) pinion shaft. NEWMONT GOLDEN RIDGE LIMITED (NGRL) AKYEM MINE …
4. Thermography of SAG-millBearing The infrared thermography inspection of SAG-mill bearings was conductedseveral times and the results are written in. The date of each data acquisition is indicated at table 2.This infrared thermography inspection was conducted by using HOTFIND LX camera. Figure 4 shows thermography image of bearing7.
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
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 ...
Double rack and pinion design nullifies side loads on the pinion shaft, minimizing bearing wear and extending life. Bearings are designed for lower bearing forces and a longer cycle life. Complies with the latest European directives like ATEX (2014/34/EU), and PED (2014/68/EU) for use in a wide range of industrial applications.
Since the early 1980s, we have been designing and manufacturing Semi Autogenous Mill (SAG Mill) and Autogenous Mill (AG Mill) under the Fuller-Traylor brand. Semi-autogenous grinding uses a minimal ball charge in the range of 6-15% while autogenous grinding uses ore only. SAG and AG Mills operate by lifting ore/grinding media and dropping it on ...
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 …
SAG Mill Components. Once the basic operating conditions have been defined for the mill designer then, and only then, can he begin taking into account shell and head stresses and trunnion bearing sizes required to carry the load and to give the required openings for feeding and discharging the mills. Mill heads are key structural components of ...
This system was designed to allow continuous sensing of the pinion temperatures with infrared sensors and can be integrated into most DCS systems. The housing design prevents lubricant and other contaminants from interfering with the sensors, providing reliable operation. Benefits:
dual pinion solutions were developed to power the mills. However, realization of the dual pinion solution was only possible when load could be evenly shared between the two pinions. When mill diameter and mill power became again increased, only the Gearless Mill Drive (GMD) could be envisaged to cover this requirement above 10 MW.
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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 …
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.
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 gets overloaded.
representative of a German mill supplier representative. Ball mill speed can be reduced during short maintenance measures, e.g. inspections of the SAG mill. This avoids fixed speed pinion drives have to be stopped with a prior grinding-out / drain-out process before interruption and the necessary time to restart. As a consequence, variable-
Metallurgists & Mineral Processing Engineers. For its extensive practical experience, 911 Metallurgist has a clear understanding of what successful mineral processing engineering is and how to go about achieving it. Your goal is the production of a material that is marketable and returns you and your investors sustainable revenues.
Online temperature monitoring of the pinion with Infrared temperature sensors is the most consistent and effective means of collecting this… A common failure cause of gear driven mill systems is misalignment, which in its most severe form can cause rapid tooth fatigue and fracture.
- Improve SAG Mill liners design to increase the availability of the plant - Improve and modify design of equipment/parts. - Perform first Condition monitoring survey at concentrator plant during commissioning stage such as Thermography in piping & ball mills pinion, Oil Analysis, UT inspection Mills and Crusher liners and UT Thickness testing.
NDE – INFRARED THERMOGRAPHY VALE # SPEC-83010 PAGE 4/8 Last Revision REV. 3 Mechanical - SAG Mill pinion gears. - Matte Processing/Clarabelle Mill rod and ball mill pinion gears (see Appendix D). 9.0 IDENTIFICATION Equipment or scanned areas are to be clearly identified. 10.0 REPORT · Background information. · Equipment used.
Automated Continuous Pinion Temperature Monitoring System Online pinion temperature monitoring of the pinion with infrared temperature sensors is the most consistent and effective means of detecting misalignment of gear driven mill systems, allowing the user to quickly detect and correct any misalignment that may develop.
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
Curing assets: Tunnels (including steamers) 25 years. 8.00%. 4.00%. 1 Jul 2012. Disclaimer: While all the effort has been made to make this service as helpful as possible, this is free service and the author makes no warranties regarding the accuracy or completeness to any information on this website. Source: TR 2021/3.
SAG mill conference, provided details of the then largest gear drive in operation on a SAG mill (34ft x 18ft) at Escondida 13.4MW, 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
Fig. 5 illustrates the pinion temperature distribution of a gear set having optimum alignment. The temperature gradient. which is the temperature at Position 1 minus the temperature at Position 5, is zero indicating that the load int,ensity is the same on both ends of th pinion. Position 1 is taken toward the mill end of the pinion face.
PARTS from ALLIS MINERALS (Svedala) 30' x 7' EGL Sag Mill, including bull gear, pinion gear, lube units and more. Manufacturer: ALLIS MINERALS SYSTEMS-SVEDALA. Inventory ID: 6J-SG01. View Details. LOT of Shell and Lube System for …
Specification Units SAG mill Ball mill Diameter m 10.97 7.32 Length m 5.00 11.58 Critical speed % 75 75 Power kW 12,000 12,000 Speed rpm 9.65 11.86 Torque kNm 11,881 9,667 Radius m 5.49 3.66 Tangential force kN 2,165 2,643
Paper held at SAG Conference 2011 - By S. Gaulocher (ABB), K.S. Stadler (ABB), Th. von Hoff (ABB), R. Veldsman (ABB), A. Fuerst (ABB) and J. Koponen (ABB): Gearless mill drives (GMDs) are the workhorse in the mineral processing industries, more specifically when it comes to grinding crushed ore and cement (in various production stages) in semiautogenous (SAG) …
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 ...
Girth Gear Pinion Infrared basics. The infrared alignment technique should only be applied to mill gear pinions not kiln or dryer gears. Kiln and drier …
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