selection criteria for sag mill drive system

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  • Selection criteria for SAG mill drive systems IEEE

    Selection criteria for SAG mill drive systems The choice of a drive system is independent on the size of the mill, its critical speed, and the horsepower required. Several areas of concern are outlined for each drive-system design. A criterion for

  • Mill drive selection for semiautogenous grinding mills

    Table 1). SAG mill drive systems used on the same size grinding mill: Cupitul cost fixed speed ac synchronous drive In calculating the NPC, the capital complete with ring and pinion gears; cost in US dollars for each SAG mill variable speed dc drive complete system was determined. Although the with ring and pinion gears; ringmotor gearless drive.

  • SAG Drive Selection Electric Motor Mill (Grinding)

    Selection Criteria for Sag Mill Drive Systems. Abstruct-The various options available for large horsepower mill 11. MECHANICAL DESIGNCONSIDERATIONS drive systems are examined, together with their impacts on mill design and relative capital and operational costs.

  • Mill drives: the desire for increased power and the

    Matching Mill Drive Description to Mill Requirements Once the power level for the primary (SAG) mill has been set, i.e., design tonnes per hour (tph) x design E total kWh/t from the “geo-comminution” sample profile, serious thought can be applied to sizing the required grinding equipment. Space here does not permit a detailed discus-

  • SAG Mill Grinding Circuit Design 911metallurgist

    Jun 06, 2016· By combining with SAG discharge and screening on the SAG discharge screens, top size control to the ball-mill circuit feed is maintained while still unloading the SAG circuit (Mosher et al, 2006). A variant of this method is to direct pebble-crushing circuit product to the ball-mill sump for secondary milling: while convenient, this has the

  • Mill Spotting Drive Application Experience

    Selection Criteria for Sag Mill Drive Systems. (SAG) mill drive systems are examined, together with their impacts on mill design and relative

  • 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

  • AG Autogenous & SAG Semi-Autogenous Mill Design Calculations

    Apr 17, 2018· SAG Mill Horsepower — Drive Power. the test parameters which should be investigated in order to establish the most power-efficient design criteria for the primary mill and the overall circuit are: the selection of PSAG for ball mill feed is made at the point where it begins to cost less to grind by ball milling than it does to produce

  • SAG Mill Grinding Circuit Design 911metallurgist

    Jun 06, 2016· By combining with SAG discharge and screening on the SAG discharge screens, top size control to the ball-mill circuit feed is maintained while still unloading the SAG circuit (Mosher et al, 2006). A variant of this method is to direct pebble-crushing circuit product to the ball-mill sump for secondary milling: while convenient, this has the

  • TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL

    the requirements. The optimal drive type can only be selected after determining the mill size, the need for variable speed and the characteristics of the electrical system of the plant. Comparison of Drives Systems for Grinding Applications The question what drive system is

  • The Selection and Design of Mill Liners MillTraj

    multi-stream plants, where mill liner design and selection is only tackled on a cost consumables basis. However, the gains to be had through good liner design and selection are just as great as on the large SAG mills. This paper looks at recognising problems in liner design and selection in existing operations, and then

  • Selecting Inching Drives for Mill and Kiln Applications

    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 inch ·(1 + (stage · 0.01)) where stage is the number of reductions between the inching drive motor and the main drive input shaft (or mill pinion if direct driven) Round up P inch

  • ABB Library Gearless Mill Drives

    Authors: T. Orser (Newmont Mining Corporation), V. Svalbonas (Fruitful Corporation) and M. Van de Vijfeijken (ABB) SAG Conference 2011 2010 Newmont made the decision to purchase a 42 foot (ft) Semi-Autogenous Grinding (SAG) mill from Fruitful and a 28 Mega-Watt (MW) Gearless Mill Drive (GMD) from ABB for the Conga Project in Peru.

  • US7567855B2 Robot system and method for ball loading for

    A robot system and method have been developed which are able to automatically load balls in semi-autogenous grinding mills so as to reduce the time used for maintenance. The robotic system is comprised of a robotic manipulator of at least 5 degrees of freedom, a grip mechanism which allows, in a sequential and programmed way, to take, manipulate and release a ball

  • Hydraulic Jack Air Motors Products & Suppliers

    Selection criteria for SAG mill drive systems The main difference in this bearing system and others that have been supplied in SAG mills is the addition of hydraulic jacks to maintain properly the air gap in the motor and to assist the bearing and race to remain circular.

  • Design and dynamic behavior of large Ring Motors for

    Ring Motor drive a grinding mill without contact between rotating and fixed parts. This concept avoids girth gear and pinions, which are used for conventional mill drives. The stator of the Ring Motor is wrapped around the mill as a ring. Due to the large size, the stator is fabricated and transported in segments. At site, the stator segments are

  • Large PWM Inverters for Rolling Mills TMEIC

    Keywords: IGBT, IEGT, 3-level in verter, mill main drives, Fixed Pulse Pattern, hot strip mill INTRODUCTION DC drives and cycloconverters have been used in rolling mill applications for many years. The appearance of the IEGT (Injection Enhanced insulated Gate bipolar Transistor) or IGCT/GCT made the large PWM drive system practical.

  • Robot system and method for ball loading for loading into

    A robot system and method have been developed which are able to automatically load balls in semi-autogenous grinding mills so as to reduce the time used for maintenance. The robotic system is comprise Selection Criteria for Sag Mill Drive Systems, 1990, IEEE, p. 901-908. Spencer et al., Acoustic Emissions Monitoring of Sag Mill Performance

  • (PDF) SINGLE STAGE SAG/AG MILLING DESIGN SINGLE STAGE SAG

    A high aspect 36ft Ø x 18ft EGL, 13 MW SAG mill with recycle crusher was selected for the single stage SAG mill configuration. This design is in line with the selection dictated in Table 2. The owner understood the circuit selection had some technical risk associated and set about mitigating these points during design and project readiness.

  • Belt Drive: Types, Material, Application, Advantages

    Belt Drive: Types, Material, Application, Advantages & Disadvantages [PDF] Belt Drives are used to transfer power from one shaft to another. This is one of the easiest and cheapest ways to transfer power in a machine. Let us learn in this article more about types of Belt Drive, the application of belt drive, and how does belt drive work.

  • The Selection and Design of Mill Liners MillTraj

    multi-stream plants, where mill liner design and selection is only tackled on a cost consumables basis. However, the gains to be had through good liner design and selection are just as great as on the large SAG mills. This paper looks at recognising problems in liner design and selection in existing operations, and then

  • (PDF) SINGLE STAGE SAG/AG MILLING DESIGN SINGLE STAGE SAG

    A high aspect 36ft Ø x 18ft EGL, 13 MW SAG mill with recycle crusher was selected for the single stage SAG mill configuration. This design is in line with the selection dictated in Table 2. The owner understood the circuit selection had some technical risk associated and set about mitigating these points during design and project readiness.

  • TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL

    the requirements. The optimal drive type can only be selected after determining the mill size, the need for variable speed and the characteristics of the electrical system of the plant. Comparison of Drives Systems for Grinding Applications The question what drive system is

  • CMP Paper 16.10.09 Final

    When mill diameter and mill power became again increased, only the Gearless Mill Drive (GMD) could be envisaged to cover this requirement above 10 MW. The GMD is by its nature a variable speed drive system. Process operators, once having the facility of adjustable speed, could not live anymore without it for SAG mills.

  • (PDF) Technical Evaluation and Practical Experience of

    Voltage waveform at the rectifier input side of an 18 000-hp LCI SAG mill drive. (a) Line-to-line bus voltage waveform (11 270-V peak). (b) Average rms

  • SUPPLY, INSTALLATION, & COMMISSIONING OF THE

    40 ft (12.2 m) diameter 20 MW Cadia gearless SAG mill, was commissioned. This was a leap of over 40% above the largest operating SAG mill. A significant saving in capital cost gave the incentive necessary for a single mill line at Cadia, resulting in the selection of the 40 ft (12.2 m) diameter mill. Now, after 18 months of

  • Fundamentals, Selection, Installation and Maintenance of

    4 Fundamentals, Selection, Installation and Maintenance of Gearboxes Part 2 practicalmaintenance.net Normal Storage During manufacture and for intervals of storage up to four months, internal components of a gearbox should be coated with a suitable oil-based rust preventative (such as Houghton

  • Roller Drive Chain Selection and Engineering Information

    232 renoldjeffrey • advancing chain technology 29 Roller Drive Chain Selection Technical Information Step 5: Select the Number of Teeth on the small sprocket. The minimum number of teeth are found in the horsepower tables on pages 6-19. To determine, first calculate the Horsepower Table Rating (HP Table) from the following

  • The Basics of Motor Selection Groschopp

    The motor selection process begins with evaluating the application and ensuring the motor chosen will properly match the needs of the application. Though often overlooked by design engineers, the items on the Application Considerations Checklist (Figure 2) are critical to OEM motor design and a successful overall system solution.

  • 10 things to consider when choosing an electric motor

    TM4’s SUMO electric powertrain offer a direct-drive approach: the high torque/low speed of the motor allows it to directly interface with standard axle differentials without the need for an intermediate gearbox. While improving system reliability and reducing overall maintenance costs, removing the transmission in an electric vehicle also

  • Mineral Processing Plant Design

    crushers to SAG circuits, on both greenfield and retrofit projects, to increase feed rate to the SAG mill. In other words, crushing plants, from primary to quaternary circuits, are here to stay. There are three main steps in designing a good crushing

  • Care and Maintenance of Bearings NTN Global

    evaluation criteria for each machine. 3.4 Lubricant Selection The purpose of lubricating the bearing is to cover the rolling contact surfaces and sliding contact surfaces with a thin oil film to avoid direct metal-to-metal contact. Effective lubrication of the rolling-element bearing has the following effects. (1) Reduces friction and abrasion

  • Detection of Pillow Block Bearings Defect Using Infrared

    2.SAG mill Golgohar mineral and industrial company has three processing line of iron ore concentrate and there is a semi-auto genius mill (dry mill) with power 3 Mw in each one. These mills are categorized as vital equipment and any problem of them could lead to processing line down time. Figure 1 shows Schematic view of dry mill.

  • Minerals Weir Group

    SAG mill discharge ball mill discharge rod mill discharge Ni acid slurry coarse sand coarse tailings phosphate matrix minerals concentrate heavy media dredging bottom/fly ash, lime grinding oil sands mineral sands fine tailings phosphoric acid coal flotation sugar beets process chemical pulp and paper FGD waste water Warman® Horizontal Pump Models