0086-21-58386256
The products are part of an important order for electric motor drives for eighteen ball mills and semi-autogenous grinding (SAG) mills with dual and single pinions. Autogenous grinding means that the mining ore essentially grinds itself. Such ball mills are used for grinding and crushing mining ore within a large rotating drum.
SAG mill, ball mill, ring gear, dual pinion, drive systems, variable speed INTRODUCTION The project is located 15 km southwest of Princeton, British Columbia (BC), an established ... Mountain has selected the state-of-the-art dual pinion mill drive systems, providing numerous advantageous features which were previously exclusively available on ...
secondary mill power that permits the range of vari- ability samples to be processed according to whether a "SAG Mill limiting" condition, i.e., harder ore, or a "Ball Mill limiting" condition, i.e., softer ore exists. For example, a ratio of 1:1.5 or up to 1:2 would indicate a trend away from processing harder ore types and
2010 - The largest dual pinion drive was sold by FL with an 11.0 m (36 ft) diameter SAG mill in ... AG/SAG mills are available in various types of basic configurations. The North American style
SAG mill, ball mill, ring gear, dual pinion, drive systems, variable speed INTRODUCTION The project is located 15 km southwest of Princeton, British Columbia (BC), an …
New Human Machine Interface - RMD Cockpit. With the RMD plus solution, operations and maintenance activities are fully optimized with the newly developed Human Machine Interface "RMDcockpit".. Based on ABB's 800xA platform, the RMDcockpit is a specific mill application tool comprised of a touch screen panel allowing full access to the main …
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 …
Walks the walk, talks the torque. Supplied as an individual component or as a fully optimised system comprising a girth gear, mill drive gearbox, pinion and barring drive, our pinions are manufactured double ended for …
MW dual pinion drive (7.5 MW per drive). The SAG mill discharges over a single 3.6 m x 8.5 m vibrating screen fitted with 14 mm (8.5 mm originally) aperture screen panels. The screen oversize is conveyed to the pebble crusher storage bin. Pebbles are reclaimed from the bin via two belt feeders, each reporting to a pebble crusher.
When standing at the discharge end of the mill, and facing the mill, if the drive is on the right hand side it is a right hand mill. If the drive is in the left hand side, it is a left hand mill. ... Establish vertical and horizontal centerline of mill and pinion shaft against the effects of this, we recommend that the trunnion bearing sole ...
The twin dc motor drive system with each motor connected to a pinion and each fed from a static thyristor power supply has been successfully installed and operated at the Lornex Mine in British …
ball mill girth gear radial axial alignment procedure. Sag Mill Syncronis Motor high axial vibration non drive end . Nov 1 2014 The pinion and girth gear yes are worn but thermo graphic and visual . to produce high electromagnetic airborne noise and radial not axial housing The alignment between the motor and pinion shaft through the air clutch has . …
SAG Mill Components. Once the basic operating conditions have been defined for the mill designer then, and only then, can he …
Ideal for ring motor drives. Polysius grinding mills can be driven via ring gear pinion drives or the COMBIFLEX® drive for drive capacities of up to 16,000 kW. Higher drive power …
Foundation – Standard foundation loading is calculated as derived from mill power, critical speeds, and total mill load. Unlike gearless drive installations, there is no need to perform costly static or dynamic modal analyses. Lubrication – Lubrication for the Quadrex® Mill Drive is provided by standard lubrication systems which can be located in a lube room …
With inside dimensions of 36-ft diam. and 19-ft long, this semi-autogenous grinding mill (SAG — see next section) will use a 43-ft diam. ring-gear drive to transmit 18,000 hp and handle up to ...
Elastic mill sag by weight of mill balls and materia! to grind A: After temporary alignment of the teeth of pinion and girth gear with the mill empty, Fig. 8a, re-alignment should be undertaken with the mill filled with mill balls, i. e. with reference to the elastic sag in cold con- dition, Fig. 8b.
2 d4 TM Mill Drivesystem 7 MW 7 MW 14 MW 28 MW 7 MW 4 MW 7 MW 7 MW 7 MW 4 MW 7 MW 7 MW SAG mill 32 ft. single drive The natural progression in gear/pinion mill drives: The 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 …
Two SAG mills with rigid pinion drives. SAG mill with DOUBLE-COMBIFLEX® drive. 7 the motor and which have to be accepted by the mill structure. xThe hydraulic jack incorpo-rated into the slide shoe support enables easy centring of motor stator and motor poles, which are attached to
Single-pinion and dual-pinion fixed-speed gear drives offer a relatively simple design. However, process flexibility and optimization ... operating cost and reduce availability of ball and SAG mills. Options for variable speed are DC motors, energy recovery ... The first Gearless Mill Drive (GMD) with a power of 6.5 MW was
AG and SAG mills are now the primary unit operation for the majority of large grinding circuits, and form the basis for a variety of circuit configurations. ... The effect of feed hardness is the most significant driver for AG/SAG performance: with variations in ore hardness come variations in circuit throughput. The effect of feed size is ...
Single-pinion and dual-pinion fixed-speed gear drives offer a relatively simple design. However, process flexibility and optimization ... operating cost and reduce availability of ball and SAG mills. Options for variable speed are DC motors, energy recovery ... The first Gearless Mill Drive (GMD) with a power of 6.5 MW was
Both the SAG mill and ball mill are each driven by two gear units. Because, on a conventional drive variant, only one engagement per pinion with the girth gear is possible per side, an economic power limit of about 8 MW per drive is in effect. With the DMG2 gear units, Siemens said this limit expands to as much as 12 MW per drive.
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 …
ABB's supply scope included four dual-pinion low-speed mill drive systems for two SAG mills and two ball mills, each consisting of two synchronous motors, converter transformers and ACS6000 frequency converters. These include active rectifier units allowing the mill drives to achieve a power factor of 0.90 leading.
By mill we refer to Ball Mills, Rod Mills and SAG Mills. Anything gear and pinion really. ... To protect the motors from damage, clutches, torque convertors or fluid couplings have been added to some drive lines. An air clutch allows the motor to be brought up to full rpm before the load is put onto it. Once the clutch has been engaged it …
Factors A, B, C and L are used to calculate the power drawn by a SAG mill chamber as shown below in equation (2) (from Rexnord 1975): kW = A x B x C x L x …
SAG Mill Horsepower — Drive Power. When the normal operating horsepower has been defined. It can be related to a design drive horsepower. ... 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 …
Get email updates for newly added Grinding Mills - Ball, Pebble, Sag, Mining. New Listing Alert. 4' x 4' Eimco, ball mill, 30 HP, Mill configured for wet grinding and overflow discharge ... or operated, - 2 units available, - 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 ...
Bordi: "We are increasing the 'tools in the chest' by offering some alternatives – for example – if the circuit actually needs a 38 ft, 20 MW SAG mill, you now have the option of a 38 ft gear driven mill. At this size gearless drive is a viable option, but it is significantly more expensive and therefore can pose a challenge.