pinion on sag mill

SAG mill drives. There are two types of SAG mill drives. Power is transmitted to the grind-ing mill either through a pinion and ring. Dan B. Kivari and John Chapman are pro-fessional engineers with Kilborn Engineering Pacific Ltd., Suite 400,1380 Burrard St., Van-couver, British Columbia, Canada V6Z 2B7. ringmotor.

The grinding process with one 34' x 20' SAG mill and two 24' x 39.5' ball mills will be briefly discussed. All three mills are gear driven by a ring gear, dual pinion and two low speed synchronous motors. Copper Mountain has installed on all three mills, the new state-of-the art dual pinion mill drives.

WiRM, the Bond rod mill work index (conducted using a wave-liner mill and a fourteen mesh closing size), unitless (but relative to either a metric tonne or Imperial short ton basis). WiRM = 115 (A×b)-0.57 [based on reinterpretation of Doll, 2016] WiRM = 1.35 (SGI)0.51 [Doll, 2016] WiC, the Bond crushing work index, unitless (but relative to ...

Early SAG mill designs using gear drives were limited in the amount of power that could be applied to the pin-ions, 3.7 MPa (5000 hp). The exception to this design was the …

Quad pinion possibilities One other option worth mentioning is the Quadrex® or QDX4 drive – which was developed in partnership between Outotec and Groupe CIF-Ferry Capitain. It enables gear driven mill power all the way up to 32 MW, territory that could previously only be filled with a gearless drive.

Ball Mill TRUNNION BEARINGS. Swivel type lead-bronze bushed trunnion bearings are generally furnished on large diameter ball Mills. The bearing swivels are of Meehanite metal spherically turned outside and bored and faced inside to receive the removable bushing. The bushing is bored and scraped to fit the mill trunnion.

Figure 1 – General overview of the high speed and low speed drive system solutions for gear driven mills (single or dual pinion) (Ingeteam). ... The breakage rate function shape of the SAG mill is largely governed by the mill load particle size distribution and mill speed. The feed in the mill contains fractions of ore that serves as the ...

The test and study work showed that a single line 42 ft SAG mill circuit gave the most favorable project economics in comparison to an equivalently powered single line 40 ft SAG mill circuit. ... Variable speed drive solutions dedicated to single or dual pinion ring-geared mills offer significant advantages over conventional drives due to their ...

Reversible rotation is often used to obtain balanced wear on mill liners and lifters, to reduce the number of mill shutdowns. This …

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

For the purpose of this discussion, hard ore in a SAG mill is considered to be over 10 kWh/t of pinion energy needed for the standard size reduction (from F80 152 mm to …

AG mills (or SAG mills with low ball charges) are often used in single-stage grinding applications. Based on their higher throughput and coarser grind relative to AG mills, it is more common for SAG mills to …

A linkedin group was recently discussing this by asking: I've tried to estimate AG/SAG Mill power requirements using several different methods: (1) Using the results of SMC data. (2) Using SAG Power Index (SPI) data. (3) Using the 1989 Barratt method updated on Alex Doll's Web site (February 16, 2015)

The mill pinion gear plays a crucial role in the smooth and efficient operation of the mill. By providing the necessary torque and rotational motion, it ensures that the mill can effectively grind and process various materials. Any malfunction or misalignment of the pinion gear can significantly impact mill performance and productivity.

With the new baring gear coupling installed, the mill motor starts up whilst baring is taking place, and the mill load is in motion. The baring gear coupling slides back in a keyway and a limit switch simply stops the baring motor. The self-disengagement clutch is a directionally actuated freewheel clutch.

The cost of edge drive is low, but the pinion needs to be replaced every 2-5 years. Edge drive is mainly used in coal mills and mills with small power. The girth gear(big ring gear) and pinion are the key of …

general, the bigger the mill diameter, the lower are the mill operating and critical speeds. Thus, for larger mills the number of poles will increase. As a result, the number of poles can vary from 48 to 72 poles (Fig. 3.) with typical mill speed requirements of about 10 rpm for larger SAG mills and about 15 rpm for smaller ball mills. Figure 3.

Search through huge mining inventory of used Ball mills, Sag mills, Pebble mills, grinder mills for sale today and ready for shipping! Allis-Chalmers, , Hardinge, Fl and more! ... - 8.6 x 13.5 ft mill shell (3.2 x 5.6 m), - Trunnion supported ball mill, - Ring and pinion gear drive, - Mill drawings available, - 450 HP WEG motor (340 ...

SAG mill and two 26 ft ball mills, all made by . The drive systems that enable the mills to operate at benchmark levels of reliability, efficiency and availability were made by ABB, whose solution comprises a 23.5 MW gearless mill drive (GMD) for the SAG mill, and two 13 MW low-speed dual-pinion ring-geared mill drive (RMD) systems for the ...

Monitoring pinion temperatures on mill gear pinions is an effective and efficient means of monitoring alignment and operating condition. Pinion temperature measurement when applied properly can adequately predict multiple failure modes, including misalignment, overheating from a loss of lubricant event, overheating from …

trains using 13 to 16 MW twin pinion gear driven mills. Singe train GMD driven options were discarded early in the assessment in favour of a dual train pinion driven SAG mills due to the added flexibility, reduced start up risk and the increased total SAG mill power available. Table 2 summarises the criteria used for plant assessment.

size F80 of 152 mm to 80% passing 1.7 mm, and a simple adjustment procedure in case the SAG product size needed to be adjusted. Bond rod and ball mill work indices are readily converted to pinion energy for rod and ball mills but not for SAG mills. Reproducibility, while not studied in this paper is clearly a part of the meaningfulness of …

UNUSED FL 36' X 24′ (11M X 7.3M) DUAL PINION SAG MILL WITH 2 ABB 9,000 KW (12,069 HP) VFD MOTORS FOR TOTAL POWER OF 18,000 KW (24,138 HP) Category: Sag Mills Item #: 6C-HMG03 View Details. UNUSED 6,500 TPH CRUSHING HEAP LEACH PROCESSING PLANT. Category: Plants Item #: 18C-OT03 ...

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 …

The graph of SAG pinion energy (to 1.7mm) Vs Bond BM Wi is given in Figure 3. Excluding the very soft and very hard projects, shows that the database in general does support a broad correlation between SAG and ball mill hardness but that the function is -defined to be useful in sizing a SAG too ill mill from a Bond BM Wi measurement.

The total time to clean & inspect a large 40' SAG mill gear is under 8 hours. Girth Gear Specialist Team includes an gear engineering specialist who conducts gear inspections based and on the inspection recommendations outlined in the annex of AGMA 6014-B15. Including a visual tooth condition assessment based on AGMA 1010-F14.

Thus, with condition monitoring of the SAG mill behaviors employing vibration, acoustic and thermal signals, the relevant parameter can be diagnosed and monitored. ... As shown in Fig. 1, the bearings of motor 1, the bearings of pinion 1 and mill trunnion were selected to monitor their performance characteristics. In each of the …

The grinding process with one 34' x 20' SAG mill and two 24' x 39.5' ball mills will be briefly discussed. All three mills are gear driven by a ring gear, dual pinion and two low speed synchronous motors. Copper Mountain has installed on all three mills, the new state-of-the art dual pinion mill drives.

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 ...

general, the bigger the mill diameter, the lower are the mill operating and critical speeds. Thus, for larger mills the number of poles will increase. As a result, the number of poles can vary from 48 to 72 poles (Fig. 3.) with typical mill speed requirements of about 10 rpm for larger SAG mills and about 15 rpm for smaller ball mills. Figure 3.

proportion of SAG mill power and this proportion falls as the liners wear (and lifting capacity falls) even when mill speed can be increased. The major proportion of mill power is …

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 …

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 …

A complete range of gear and pinion sets, inspections, design, installation and alignment services to drive your mill's performance Introducing a new name Outotec is proud ... • AG and SAG mills • Ball and FGD mills •Pebble and rod mills • Multi-compartment mills • Rotary kilns and dryers • Mixers and other equipment

Variable Speed Drives. Variable speed drives are not new. Many have been used in the cement industry on mills drawing up to 6,525 kW (8,750 hp). There are 39 gearless drive installations worldwide, but only one in North America (St. Lawrence Cement). Recently both Afton and Lornex in British Columbia installed variable speed …

Conventional mining process circuits use both Semi-Autogenous Grinding (SAG) and Ball mills. It is very common that the SAG mills are operated with adjustable frequency drives (AFDs) and the Ball mills are operated at fixed speed [1]. Recently, however, adjustability of Ball mill speed has been given more consideration. Also, to maximize throughput, the …