We are essentially providing up to twice the power transmission of a conventional dual pinion drive. Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing Metso Outotec to produce the world's largest SAG mill of 42’ in
NDE INFRARED THERMOGRAPHY VALE # SPEC-83010 PAGE 4/8 Last Revision 2020-09-29 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.
The SAG mill pinion energy, W SDT (kWh/t) and SAG discharge Bond ball mill work index, S d-BWI (kWh/t), are then used to calculate the total energy to grind the ore from 80% passing 152 mm to 80% passing the client specified final product size P 80.This information, along with the ore specific gravity, is used to calculate necessary mill sizes and motor power in industrial applications.
18-04-2018· 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
Rely on our proven track record of SAG and AG Mill superiority. Since the early 1980s, we have been designing and manufacturing Semi-Autogenous (SAG) and Autogenous (AG) Grinding Mills 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 mill power draw models are used in mill design and grinding circuit modelling to predict mills that the published k factor was fit against consisted largely of Australian and African mills that typically have pinions (0.985 efficiency), gearboxes (0.985 efficiency) and induction motors (0.960
other methods. The ball mill correction factor (CFnet) is empirical and one way of estimating it was presented by Amelunxen at the Procemin 2013 Short Course by Doll & Amelunxen. 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
26-11-2019· The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill’s
SAG Mill Pinion Power kW 3348 3316 Ball Mill Pinion Power kW 2621 2574 Recycle crusher feed rate tph 77 91 SAG F80 mm 96 80 Ball Mill P80 um 140 124 The measured particle size distributions for the two feeds are shown in Figure 3. It can be seen that the amount of fines varied significantly between surveys. The 80% passing values were 96 and
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 shown in the attachment.
We are essentially providing up to twice the power transmission of a conventional dual pinion drive. Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing Metso Outotec to produce the world's largest SAG mill of 42’ in
The SAG mill pinion energy, W SDT (kWh/t) and SAG discharge Bond ball mill work index, S d-BWI (kWh/t), are then used to calculate the total energy to grind the ore from 80% passing 152 mm to 80% passing the client specified final product size P 80.This information, along with the ore specific gravity, is used to calculate necessary mill sizes and motor power in industrial applications.
18-04-2018· 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
SAGDesign testing provides SAG pinion energy grindability in kWh/t to within +/- 5% from 152 to 1.7 mm, and Bond Ball Mill Work Index on SAG ground ore, from the SAG test on the same sample. Starkey & Associates uses the patented SAGDesign technology to calculate accurate mill sizes from measurements on a client’s own ore samples.
17-04-2018· Power drawn at the pinion is 448 kW, 13.617 kWh/tonne (SAG mill) and 570 kW, 17.325 kWh/tonne (ball mill) when processing 32.9 mtph, for a total of 30.942 kWh/tonne or 14.6% above the conventional estimate. A ball charge volume which is lower than those tested has been selected in order to minimize wear.
26-11-2019· The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill’s
Ball Mill / SAG Mill Wear Parts Cast replacement wear parts with improved wear life. 250-807-7999 [email protected] UNICAST.CA Drives, Gears, Pinions, Bearings Unicast ball mill drive systems, including gears, pinions, and bearings. BALL MILL DRIVES, GEARS, PINIONS, AND BABBITTED BEARINGS Accurate and customized to fit. With in-field
The online infra-red monitor is an excellent indicator of various critical pinion related factors, including: • State of alignment • Sufficient lubrication • Quality of lubrication Outotec Pinion Condition Monitoring is available for any installed Outotec mill equipped with a pinion and ring gear.
Rely on our proven track record of SAG and AG Mill superiority. Since the early 1980s, we have been designing and manufacturing Semi-Autogenous (SAG) and Autogenous (AG) Grinding Mills 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 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
The online infra-red monitor is an excellent indicator of various critical pinion related factors, including: • State of alignment • Sufficient lubrication • Quality of lubrication Outotec Pinion Condition Monitoring is available for any installed Outotec mill equipped with a pinion and ring gear.
other methods. The ball mill correction factor (CFnet) is empirical and one way of estimating it was presented by Amelunxen at the Procemin 2013 Short Course by Doll & Amelunxen. 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
The Pinion condition monitoring is available for any installed Metso Outotec mill equipped with a pinion and ring gear. Metso Outotec offers a complete package that includes a new hatch to accommodate sensor mounting tubes, an air purge pneumatic system complete with a junction box, and infra-red sensors complete with a separate transmitter junction box.
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-
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.
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
The SAG mill power draw model of Austin (using the cali-bration by Doll, 2013) is used to predict the process power draw at the mill shell, Pshell, and the efficiency losses for the drive’s mechanical components based on Doll (2012) are used to determine the motor output power, P. The effect of varying the mill speed as a fraction of the critical
Pictures of the insides of an AG mill and a SAG mill which have been crash stopped are shown in Figures 5 and 6 respectively. Accurate measurements of the ball filling can only be made after the mill is ground out. In this case the mill is operated with the feed turned off until all of the ore has exited the mill.
Mill Pinion Main Motor HS Cplg. HS Cplg. Shiftable Cplg. LS Cplg. Pillow Blocks Figure 2 Typical Mill Inching System. Source: I Association an output power of the inching system. Therefore an adjustment of 1% per mesh of the inching reducer drive can be added to reflect efficiency losses. P inch = P
11-06-2021· Using Thermography to Uncover Hidden Problems. Thermography can be used to identify and analyze thermal anomalies for the purposes of condition monitoring of machines. These thermal anomalies are usually caused by such mechanisms as operation, improper lubrication, misalignment, worn components or mechanical loading anomalies.
15-10-2020· The SAG mill will be a single pinion low aspect mill, operating in a closed circuit. The mill has an inside diameter of 3.8m and an effective grinding length (EGL) of 5.0m. The mill receives coarse ore and process water at a variable flowrate to achieve the correct pulp density. Lime and zinc sulphate are also dosed to the SAG mill to condition
01-03-2000· SAG mills can operate at a fixed speed or adjustable speed through the use of ac synchronous (usually 200 rpm) supplies power to the ring gear through a pinion, and the ring gear turns the mill.
SAG mill 32 ft. single drive The natural progression in gear/pinion mill drives: The Metso QdX4TM Mill Drive provides the next step in the evolution of change in mill drive architecture, while allowing the system to be built with components that are within current manufacturing capabilities.
SAG Mill shells, Ball/Rod for Mill shells, Ball Mill head in halves, SAG Mill heads Girth gears, Pinions, Trunnions, Bearings, Lubrication Units Millrex dual-pinion self-aligning (2,3 & 4 stages) and Ermill single-pinion self-aligning compact lateral drives
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.
Mill Pinion Main Motor HS Cplg. HS Cplg. Shiftable Cplg. LS Cplg. Pillow Blocks Figure 2 Typical Mill Inching System. Source: I Association an output power of the inching system. Therefore an adjustment of 1% per mesh of the inching reducer drive can be added to reflect efficiency losses. P inch = P
The SAG Power Index (SPI) test (Starkey & Dobby, 1996) uses a benchscale SAG mill test to determine the specific energy of an industrial SAG mill. The test is operated in closed circuit and the time required to grind the material to a P 80 of 1.7 mm is used to predict AG/SAG
These mills are scheduled of start up on 2012. Our market share in China exceeds 80% with the largest mills supplied to date being a Ø7.9m x 13.6m 2x8.5MW Ball Mill and a Ø11m x 5.4m 2x8.5MW SAG Mill,being the largest in China.
Mill Pinion Replacement Oversight. Read more. Engineering. August 19, 2020 by William Quinn William Quinn No Comments. P-F Curve Mill Case Study: Tooth cracking observation from monthly follow up inspections on a 34′ X 20′ SAG Mill. Read more. Uncategorized. June 16, 2020 by William Quinn William Quinn No Comments. How to do weekly
11-06-2021· Using Thermography to Uncover Hidden Problems. Thermography can be used to identify and analyze thermal anomalies for the purposes of condition monitoring of machines. These thermal anomalies are usually caused by such mechanisms as operation, improper lubrication, misalignment, worn components or mechanical loading anomalies.