sag mill drives girth gears at 18 000 hp

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(PDF) Autogenous and Semi-Autogenous Mills, 2015 Update

Gearless mill drives (GMD) are the preferred drives for large mills requiring greater than 18MW. However, power transmitted through a gear drive is expected to near 14 MW per drive system in the ...

technical specifications sag mill

SAG mill dimensions are 18 ft dia. x 7 ft FF (flange to flange) and is equipped with a 1 000 hp motor while the ball mill is 11 ft dia. x 14 ft 7 in FF and equipped with a 900 hp motor. Coarse ore is reclaimed from the storage bin and is fed via a conveyor to the SAG mill which runs with very minimal ball charge due to over-capacity of the mill.

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Installation Twin Pinion Sag Mill

Oct 05, 2021· 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 the edge transmission device Their reliable operation is directly related to …

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Mill (grinding) - Wikipedia

SAG mill. SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also use grinding balls like a ball mill. A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%. The largest SAG mill is 42' (12.8m) in diameter, powered by a …

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Sag Mill Synchronous Motors -

Sag Mill Drives Girth Gears At 18 000 Hp Motors How Much ... sag mill drives: girth gears at 18,000 hp motors in How Much Crusher[], news, photos and information about orlando sentinel the smarter travel ...

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SAG Milling in Australia -Revised Submission

pinion drives, each of 10 000 HP (7 500 kW) located on opposite sides of the ring gear, limited mill size for many years to 36-ft diameter. Today, 20 MW mills are in operation and designs exist for 24 MW units. Savings flowing from a single line operation at high tonnage – 1500 to 2000 tph, have driven down the cost of production.

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Design coaching22 - SlideShare

Sep 19, 2013· A 4 inches diameter shaft is driven at 3600 rpm by a 400 Hp motor.The shaft drives a 48 inches diameter chain sprocket having an output efficiency of 85%.The output force of the driving sprocket and the output of the driven sprocket are: a. 200 lb …


Gear cutting of a split girth gear for a cement mill having an input power of 2200 HP 5. Separate mill A: Damage to mill cylinder, neck or stub endanger girth gear and pinion. Repairs entail extra work for girth gear dismantling. B : Damage to mill cylinder cannot endanger gear teeth. Mill repairs do not

MD-12 Spur Gear Design

• Pair of commercial-grade spur gears is to transmit 2 hp at a speed of 900 rpm of the pinion and 300 rpm for gear. • If class 30 cast iron is to be used, specify a possible design for this problem.

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sag mills in india

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 . Know More

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SAG Mill Variable Speed Drive - 911 Metallurgist

Jul 18, 2018· This drive train has been well proven over many years of service as a fixed speed drive and offers major benefits over any other arrangement. As mill size increased above approximately 4,476 kW (6,000 hp), the limits of gear technology were reached and it was no longer possible to drive through a single pinion. Therefore, two pinions were used ...

Calculation of Gear Dimensions | KHK Gears

NOTE 1 : The subscripts 1 and 2 of z 1 and z 2 denote pinion and gear. All calculated values in Table 4.1 are based upon given module m and number of teeth (z 1 and z 2).If instead, the modulem, center distance a and speed ratio i are given, then the number of teeth, z 1 and z 2, would be calculated using theformulas as shown in Table 4.2.. Table 4.2 The Calculations for Number of Teeth

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setting, gear ratio (main and sub) Normal spindle velocity control Velocity loop gain setting, and setting of filters (main and sub) for eliminating vibration, resonance elimination filter Rigid tapping Command setting, velocity control setting (main and sub), position control setting, fine Acc./Dec. (16i series only)

autogenous mill hp

The mill is driven by tWD 3 000-HP motors through gear reducers resulting in a total connected hDrsepDwer .of 6000. Semi-autDgenous mill speed is 10,7 rpm, .or 73% COMPUTER CONTROL AT BENGUET CORPORATION, PHILIPPINES 27Computer Control of the Semi-autogenous Grinding Mill · mill, it needs to have a bore larger than the mill outside ...

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When it comes to small- and mid-sized mills, the frame and stand form one unit which leads to a high level of dynamic resilience (mono-block design). Large-scale milling machines are generally designed in a modular fashion, but for any size of mill, the milling head is the key component. It can machine the workpiece on three sides simultaneously.

ABB drives - Technical guide No. 4, Guide to variable ...

chine. Energy is supplied to the drive system from the power supply. In each of the three drive system components, variable speed control is possible. Variable speed control can be accomplished, for example, using a frequency converter as the energy control component, a two speed motor as the motor component and gears as the transmission component.

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US3720288A - Lubrication system for grinding mill or the ...

In combination with a grinding mill or the like having a trunnion supported by a stationary bearing structure to define a ''''free bearing'''' which permits axial contraction of the grinding mill during the cooling-off period after mill shutdown, a high pressure lubrication system including a high pressure pump for applying hydrostatic pressure to the ''''free bearing'''' during the mill ...

Twin Pinion Ball Mill

Mining and mineral processing industries . Gearless mill drives Gearless mill drives (GMD) for semiautogenous (SAG) ball and autogenous (AG) mills eliminate the typical mechanical components of the drive train (shaft gearbox pinion and ring gear) In 1969 ABB delivered the first GMD ever which is still in operation today The upper limit of the power range today is about 35 MW

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