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US3735217A Twin motor drive system Google Patents

A twin motor drive system having two synchronous motors of usual construction driving a common load. Means are provided for controlling the field excitation of the motors in a manner to maintain equal division of the load.

Mill (grinding) Wikipedia

SAG is an acronym for semiautogenous 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 28 MW (38,000 HP) motor.

Selecting Inching Drives for Mill and Kiln Appliions

Selecting Inching Drives for Mill and Kiln Appliions Glen Cahala Frank C Uherek, Principal Engineer Gear Engineering Software Development the rotation of the horizontal grinding mills for maintenance. Here the inching drive provides between the inching drive motor and the main drive input shaft (or mill pinion if direct driven

INCHING DRIVE SYSTEMS for Grinding Mills Abacus

INCHING DRIVE SYSTEMS for Grinding Mills Designed and manufactured by Abacus Hydraulics Ltd. The drive units are equipped with the exclusive TORFLEX® gear type coupling which has been specifically designed and developed by Abacus Hydraulics Ltd. Small size couplings are equipped with manual shifter mechanism

dual motor grinding mill drive synchronous motor

Patent US3735217 Twin motor drive system Google Patents. A twin motor drive system having two synchronous motors of usual Large grinding mills such as ball or rod mills, and particularly rock or ore grinding mills . 1966, Mar 18, 1969, Northern Electric Co, Drive system employing dual motors.

Ball Mill Design/Power Calculation

A motor with around 1400 Horse Power is calculated needed for the designed task. Now we much select a Ball Mill that will draw this power.. The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution. The following shows how the size or select the matching mill required to

Mining industry Marketspecific Solutions Siemens

The gearless mill drives operate more energy efficiently, having a 5% higher efficiency factor than conventional drive systems. The BelAZ75710 is powered by an electric drive system consisting of four electric motors from Siemens, each with an output of 1,200 kW, that keep the more than 800ton GVW vehicle moving on the road.

Ring gear drives huge grinding mill Machine Design

Motors & Drives Ring gear drives huge grinding mill. By this summer, a grinding mill that is bigger around than a Boeing 747 will turn chunks of copper ore into gravelsized bits for smelting and

Cheap DIY Option for a Motorized Grain Mill HomeBrewTalk

Jan 01, 2017 · While motors are fairly inexpensive (~$50 used) and easy to come by, you also have to buy pulleys (~$30$40) and a belt. The other solution is to use a directdrive motor that has a builtin gearbox that reduces the rpm. These gear motors are considerably more expensive, however, usually running close to $200.

Grinding Mills, Girth Gears, Pinions Mill Shells, Mill

Grinding Mills. New Grinding Mill Designs Refurbishment Of PreOwned Mills & Reloion Mill Components Open Gearing. Girth Gears Pinions Industrial Gearboxes. Gearbox Rebuilds Radicon Drives Scrubbers Kiln & Drier Parts Crushers, Screens & Wear Parts. Excel Premium Components Furlan Crushers Wear Parts Shovel Parts Process

Drive Solutions for the Global Mining Industry

Appliion 1. Grinding Mill Systems Grinding mills are crucial to mineral processing operations. As lower quality ore bodies are tapped, the tonnage processed per ounce of salable material will increase. This degradation in ore quality requires more power in the mill circuit, meaning larger motors and drives.

Medium voltage AC drives Product overview ABB Ltd

Type of motor Induction motor Induction motor Induction, synchronous and / or permanent magnet motor M M M M ~ = = M M General purpose medium voltage drives are used to control standard motors. Typically these motors are used to drive appliions such as pumps, fans, compressors, mixers, mills and conveyors.

SIMINE Gearless mill drives

millmotor interface is a multifaceted task, a procedure Electrical equipment and automation of a drive system Larger grinding mills are at the heart of every grinding section. Stringent demands to achieve high throughput, highest availability, optimized grinding circuits and power consumption optimization require highperformance

Motorized Milling Spindles Setco

These spindles are offered in a variety of sizes and configurations, including block, cartridge, flange, and footmounted styles. Motorized spindles have a compact design, integral drive motors and provide smooth operation with less vibration than beltdriven designs. Motorized Spindle highlights. Standard Grinding, Milling and Boring Spindle

Wet Grinding Attritors, High Energy Stirred Ball Mill

Batch Attritors range in size from a 16gallon gross tank capacity to a 600gallon gross tank capacity and from a 5 HP motor to a 150 HP motor. These versatile and easytomaintain grinding mills have been successfully used in a variety of industries to grind everything from chocolate to tungsten carbide.

Spindles Setco

Setco is the premier manufacturer of standard and custom milling / drilling spindles for CNC Machining Centers. Including direct drive, belt driven, motorized. All spindles are available in cartridge or foot mounted block housings. All spindles may be

Drive Solutions for the Global Mining Industry TMEIC

Appliion 1. Grinding Mill Systems Grinding mills are crucial to mineral processing operations. As lower quality ore bodies are tapped, the tonnage processed per ounce of salable material will increase. This degradation in ore quality requires more power in the mill circuit, meaning larger motors and drives.

gemini NGM SCHNEEBERGER

gemini NGM 5axis CNC grinding machine with high performance and autonomy for the serial production of end mills, drills, profile tools, profile grinding of pinion cutters and hob peeling cutters, as well as production grinding tasks such as profile grinding and flat grinding.

Literature Review: Gearless Motor Failures – A Mill

Sep 10, 2014 · In [1], Svalbonas reviews the statesoftheart in the design of grinding mills and ringmotors (for gearless drives). He concludes that failures in ring motors occurred because the structural design of these motors had not been validated through measurement.

Advantages of Gearless Motor Drives in Large Ore Grinding

Gearless motor drives are also known as "ring motors" or "wrap around motors." The motor consists of a large number of magnets placed circumferentially on the shell of the grinding mill. This is similar to the rotor of a conventional motor.

Dry Grinding Ball Mill Drive Motor Failures

Grinding Ball Mill Drive Motor Failures. dry grinding ball mill drive motor failures iwspl dry grinding ball mill drive motor failures Vincent Motorcycle Misc Information I noted years ago that most copper steel or SS oil pipes did not mate up with the rocker feed banjos very well and like Jack thought that a flexible pipe Get More Info.

Laboratory Grinder Laboratory Mill Sample Preparation

The UDY Cyclone Sample Mill is powered by a 1/2 hp AC/DC universal 115V 10,000 rpm full load (16,000 rpm no load) The grinding ring has tungsten carbide abrasive particles on a steel base. Ground material is collected in 120 ml glass bottles, fabric bags, or other containers.

Gearless mill drives Grinding ABB

Driving value Sophistied ringgeared mill drives from ABB ABB Review article (English pdf Article) Mount Milligan mill drives Sophistied grinding technology and services at work (English pdf Article) Bigger is better ABB drive systems designed to power mega mills in mining (English pdf

Roots & Branches VKP1024M2 Deluxe VKP1024 grain mill

With the Electric Motor for the Roots & Branches Deluxe Grain Mill you can now choose manual or electric operation. It''s the answer for convenient everyday use at an affordable price! Motor is for use with the VKP1024 Grain Mill only.

BALL MILL DRIVE MOTOR CHOICES artecmachine

The mill used for this comparison is a 4.4meter diameter by 13.6 meter long ball mill with a 5000 HP drive motor. It is designed for approximately 90 s.ton per hour. This type twocompartment mill is a state oftheart shell supported cement finish mill. The torque and time requirements of the mill

Sentinel: Siemens Gearless Mill Drives

Jan 19, 2016 · The mills at Sentinel in Zambia are amongst the world''s biggest, with 2 off 40 ft SAG mills complete with 28 MW drives, and 2 off 28 football mills with 22 MW drives. For mines of this size

M. Keyßner, T. Fahrland, Loesche , Duesseldorf

4M. Keyßner, T. Fahrland, Loesche , Duesseldorf, Germany 3 Drive selection for large Loesche vertical roller mills grinding mills has been steadily increased. For example, in 2006 mill capacities of about 220 t/h equated to 5500 kW of maximum power demand. Nine years

Grinding mills

Every mining operation has a unique grinding process. has experience of over 8,000 grinding mills globally, including manufacturing and delivering the largest SAG/AG mills in the world. Our experts welcome the opportunity to assist you with circuit and circuit control design as well as startup, operation, and optimization of your mill.

12 Basic Motor Types Used For Industrial Electric Drives EEP

7. Slip Ring Induction Motor. It has high starting torque and large overload capacity. The speed of slip ring induction motor can be changed up to 50% of its normal speed. Slip ring induction motor is used for those industrial drives which require high starting torque and speed control such as lifts, pumps, winding machines, printing presses, line shafts, elevators and compressors etc.

Gardco :: Jar Mills

U.S. Stoneware''s unitized jar mills are engineered for economy, compactness and mobility. Assured reliability results from all welded steel frames, powerful roller chain drives, and pillow blocks with cartridgetype permanently sealed ball bearings for efficient operation.

The operation modes of a grinding mill with gearless drive

The local control panel for the mill drive (MLCP) is loed near the mill, where the operator can observe the mill and the motor directly and verify the results of handling. A selector switch on the MLCP controls the Normal, Inching, Creeping and Balancing operation modes. A second selector switch on

What motor should I get for my barley crusher? Community

Sep 24, 2013 · Ideally, a pulley that mounted directly to the arbor for the grinding wheel. The largest power draw and torque demand is when the mill is initially started. If you were to set it up and turn it on before pouring in grain, you would be able to use a much smaller motor than you would need otherwise.

ABB Motor Gearless Mill Drive GMD System

Nov 08, 2016 · ABB Motor Gearless Mill Drive GMD System. Electric Motor HOW IT''S MADESuper Electric Motor Manufacturing Technology in China Duration: 22:05. SMT Winding Equipment Recommended for you

Used Motors800hp For Sale A.M. King

Buy used Motors800hp from A.M. King Industries. We can help guide you to the best solution for your equipment needs. Used Mining & Processing Equipment Grinding Mills, Crushers & Process Plants

Preprint 13050 ceecthefuture

Girth gear drives have been, and continue to be, the primary method of driving SAG mills, Ball mills and other rotating elements. Several thousand grinding mills have been manufactured and have been in operation for the last century. The gearless drive came into the minerals industry in 1980 and as per their reference lists, Siemens

Ball Mill Drives Mineral Processing & Metallurgy

These assume no greater than a 10% voltage drop at the motor terminals. VBELT Ball Mill DRIVE Vbelt or polyV drives are generally used on grinding mills consuming 350 HP or less. Where power exceeds this, drives become so large and motors become special, resulting in

Medium voltage AC drives Product overview

Type of motor Induction motor Induction motor Induction, synchronous and / or permanent magnet motor M M M M ~ = = M M General purpose medium voltage drives are used to control standard motors. Typically these motors are used to drive appliions such as pumps, fans, compressors, mixers, mills and conveyors.

corvus NGB Ctype SCHNEEBERGER

Motor spindle. Grinding spindle power 82kW peak, highest power for the production of large tools with high volume chip removal The 5axis CNC grinding machine for long and heavy tools such as granulate mills, large die sinking end mills, end mills, prismatic or round broach tools, grooved shafts and gear racks! Direct drive motor for

Laboratory Equipment Lab Mixers Norstone Inc.

Norstone sells any and all types of lab equipment, big & small, as well as mixers, mills, blades, grinding media, sieve pans, mill jars, containers, and laboratory accessories. Norstone prides itself on providing lab equipment of exceedingly high quality and durability to laboratories everywhere.

Gears and Pinions

Gears and Pinions. is proud to announce the launch of our new rebranded offer: Gears and Pinions. A complete range of gear and pinion sets, inspections, design, installation and alignment services to drive your mill''s performance.

SIMINE Gearless mill drives Siemens

millmotor interface is a multifaceted task, a procedure Electrical equipment and automation of a drive system Larger grinding mills are at the heart of every grinding section. Stringent demands to achieve high throughput, highest availability, optimized grinding circuits and power consumption optimization require highperformance

Gearless mill drives

pinion, gearbox, coupling, motor shaft and motor bearings, used within a conventional mill drive system. By mounting the rotor poles directly onto the mill, the mill itself becomes the rotor of the gearless motor. Building a track record ABB''s experience in optimizing gearless solutions for grinding appliions extends over 50 years,