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SAG and AG Mill – Amstar Corporation

When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Amstar SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW. Our team of product engineers continually improves SAG/AG Mill designs in order to provide the most robust, safe, and efficient grinding ...

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(PDF) Supervisory Fuzzy Expert Controller for SAG Mill ...

Relationship between SAG mill power draw, bearing pressure and feed rate. Modelling of SAG mill power draw (Avg. Process Value = 6015 kW, Avg. Model = 6075 kW, Std. Deviation: 6.29%). +5

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Kearney graphite mine installing hydraulic drive SAG mill ...

The mill is a conventional SAG mill in all ways apart from its drive assembly and, it is centre-driven at the discharge end using a Hagglünds hydraulic motor and powerpack. "To date, this is the largest hydraulic motor installed on a SAG mill, with 950 kW of power, torque of 1200 kN.m (start-up) and 650 kN.m (operational), and speed of 13.86 ...

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TECHNICAL NOTES 8 GRINDING R. P. King - mineraltech.com

8-3 Centrifugal force outward Fc mp& 2 Dm 2 (8.1) & is the angular velocity, mp is the mass of any particle (media or charge) in the mill and Dm is the diameter of the mill inside the liners. Gravitational force Fg mpg (8.2) The particle will remain …

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FAG Rolling Bearings for Rolling Mill Applications ...

Therefore, roller bearings, i.e. cylindricalroller bearings, tapered roller bearingsor sphericalroller bearings, become the automatic choice for carrying the radialloads. These bearingsare made of through-hardened rolling bearing steelor in some casesof casehardening steel. The selection ofthe bearingsfor a specificapplication isinfluenced

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sole plates for sag mill

One (1) each used 32' x 12' long Hardinge/Koppers SAG mill.Gears, bearings, pedestals 2 - 3400 HP Motors 2 - Falk gear reducers High speed and low speed coupling Lubrication systems (gear & main bearings) Motor starters and controls (including switchgear) Mill discharge, grates and bolts Trommel discharge screen Liner handler and controls Mill saddles Feed chute …

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Vibration Sag Mill Motor NDE Bearing - AMP Maintenance Forums

Robbie, We are to assume that the SAG Mill has only one drive - correct? Does operations reverse rotation periodically to ensure even liner wear? If …

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Toe angle measurement for SAG mill control at Lihir gold mine

SAG Mill process control classically maintains the SAG mill volumetric filling within a set operating range. Typically a SAG mill weight measurement, by either bearing pressure transducers or load cells, is used as an inferred measurement of volumetric filling. To maintain volumetric filling within a set operating range the SAG weight setpoint use for process control …

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OPTIMAL SAG MILL CONTROL USING VIBRATION & DIGITAL …

Figure 4 - Mill Conditions: Too Fast, Too Empty, Full Mill (left to right) After the polar plot is checked to determine if a mill is operating at too high an RPM, the fill levels are monitored. Figure 5 illustrates a trend taken from a SAG mill running under expert system control using bearing pressure as the primary control variable.

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Paper # 25 - Copper Mountain Overview on the Grinding ...

The Copper Mountain SAG mill is 10363 mm [34 feet] in diameter and 6096 mm [20 feet] long. It is a grate discharge mill with an inside diameter of 10363 mm [34 feet] and a grinding length of 5334 mm [17.5 feet]. The mill is driven by two 8,500 horsepower ABB motors. Figure 2 - …

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Tenova TAKRAF Supplies Unique SAG Mill in Canada | E & MJ

"Tenova's scope of work includes the engineering, manufacturing, shipping and technical assistance during erection of the SAG mill's feed end, shell, discharge end, drive and main bearings, as well as all supporting equipment (lubrication and jacking systems)," said Tenova TAKRAF Engineer Pieter Van Der Walt.

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SAG Mill Components - Mineral Processing & Metallurgy

SAG Mill Components. Once the basic operating conditions have been defined for the mill designer then, and only then, can he begin taking into …

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Custom engineering seals the deal at mill - ScienceDirect

An operational flood in the bearing housing compounded the sealing challenge for the SAG mill gearbox. Unlike most gearboxes that splash oil into the bearings, the gearbox on the SAG mill pumped oil into the center of the double row spherical roller bearings.

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NCP SUPPLIES ONE OF THE LARGEST GEAR DRIVEN MILLS EVER ...

The company supplied the KOTH project with a Ø36 x 18ft, 15 000kW Dual direct Drive Bi-directional Semi-autogenous (SAG) mill supported off multi-pad hydrostatic trunnion bearings. The direct drive mill excludes the gearboxes, with the two main drive synchronous motors controlled by an ABB VVVF (Variable Voltage, Variable Frequency Drive) and directly …

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Grinding mill upgrades - Outotec

Oil leakage from trunnion bearing seals can cause many environmental and administrative concerns. The Outotec barricade seal arrangement solves the myriad of issues around the proper sealing of grinding mill main bearings. Our design incorporates protective properties superior to any arrangement yet brought to market.

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sag mill trunnion bearing

Get A Quote Reconditioned SAG Mill Titan Process Equipment. View our online inventory of used SAG mills and send us your request today bearing type DE trunnion bearing assembly roller bearing type girth gear 4 A SAG mill is characterized by its large diameter and short length weight the hydrostatic trunnion bearings which support the turning mill shell can …

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Fuzzy Logic Control On a SAG Mill - ScienceDirect

decision tree 5. 5.1 Process The process is a semi-autogenous grinding (SAG) mill a nickel mine in Canada. The SAG mill process uses steel balls and large rocks for grinding, with a minimal ball charge of 6% to 15%. The mill is large in diameter but short in length and rotates tumbling contents to produce a breaking action.

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Grinding mill hydrostatic bearing replacement - YouTube

The Outotec hydrostatic bearing (HSB) upgrade is a retrofit solution for grinding mills. Existing Bronze bearing pads are replaced with pads made from ...

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Vibration Sag Mill Motor NDE Bearing - Maintenance

At our mine we have an issue with vibration at the Sag Motor NDE bearing. The bearing is a journal white metal bearing. The motor has been running for about 14 months now. The vibration at the NDE bearing was around 2mm/sec. In the last month it has...

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SAG Mill | Autogenous and Semi-Autogenous Mills | …

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 downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

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Sag Mill Syncronis Motor high axial vibration non drive ...

When the Sag Mill was in operation the clutch operation just did not look ok and pad wear was uneven. The clutch was changed with a used clutch and the results were significant. The axial vibration on the Sag NDE bearing axial plane reduced from 30mm/sec rms to under 2mm/sec rms. The motor vibration is now satisfactory in all planes.

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Bearings for Rolling mill Rolls - IspatGuru

Roll bearings are to meet the basic need of the rolling mill which is the smooth rolling of the steel products. They are friction reducing devices which provide support to the rolls for effective rolling with minimum of energy loss. The bearings are designed to withstand high rolling loads, heavy shocks, varying speeds, and high temperatures.

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Trunnion Bearing Assembly Ball Mill & Rod Mill

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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Gearless mill drives - ABB

• 28 MW GMD for a 40' SAG mill • 28 MW GMD for 42' SAG mill Whether it is size or an installation at the highest altitude (4600 m.a.s.l.), ABB's GMDs are well positioned to contribute to the building of larger and ever more powerful mills. — Leading the gearless mill drive evolution The ABB gearless mill drive (GMD) is the most powerful ...

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SAG Mill - Semi-Autogenous Grinding Mill

A SAG mill is characterized by its large diameter and short length. It rotates, tumbling its contents violently, causing a breaking action. The mill is lined with wear resistant steel liners which are fitted with lifters to assist with raising the load. The liners are replaced as they wear and the lifting action has degraded.

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Putting a Ball or SAG Mill on Care and Maintenance

Putting a Ball or SAG Mill on Care and Maintenance. The mine is closed and now you need to know how to put the SAG or Large Ball Mill in care and maintenance does not have to be complicated to the point where you need bridge erection equipment for lifting a Mill (AG/SAG/Rod/Ball). You actually need to lift a car higher than a mill.

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Alphatec Egnineering SL - SAG mill complete foundation ...

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 (SAG mill) driven by a 4000 kW electric motor. The project was part of a major intervention at two ...

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Measuring SAG Mill Charge and the Increased Benefits of ...

Measuring SAG Mill Charge and the Increased Benefits of Utilizing Accelerometers for Positioning ... and because bearing pressure is a function of total mill weight, it is also incapable of ...

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The Science of Comminution

- SAG Mill Load Control 28 - Mill Power Indication 28 - Cyclone Pressure 28 - SAG Mill Speed Control 28 - Pebble Crusher – Steel Removal Logic 28 ... mills using antifriction type main bearings for high reliability and load carrying capacity. Another …

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