low speed mill drives
Gearless AG/SAG mills Variable speed capability Removal of limits of design power gear and pinion drives are practically limited to about 10,000 hp per pinion. at this time, there is no reasonable gear drive alternative for more than two pinions or above 20,000 hp. the best solution is the gearless mill. Very high drive efficiency Low maintenance requirementsLow speed drive solutions for ringgeared millsLow speed drive solutions for ringgeared mills 20120710 ABB's low speed ringgeared mill drive solution is based on synchronous motors and frequency converters. The motors are typically rated in the range 3.5 – 9 MW with a nominal speed around 200 rpm.
Drive selection for rolling mills Millennium Steelthe gearboxes as rolling mill DC motors are most efficient at low speed and in high torque appliions, whereas AC motors typically need to run above 800rpm to be costeffective. Also, the case for the higher efficiency of AC motors is many times negated by the wasteful braking methods of some AC drive systems, as described below.Ball Mill Drives Mineral Processing & MetallurgyWhere power exceeds this, drives become so large and motors become special, resulting in an uneconomical appliion. Generally the driven mill sheave is of split hub construction to facilitate field assembly. Vbelt drives allow use of higher speed motors, generally low in initial cost. Motor speeds should be between 580 and 1160 rpm.
Reprint from ABB Review, 1&2/Driving value Sophistied ringgeared mill drives from ABB Reprint from ABB Review, 1&2/2011 The latest generation of ABB mediumvoltage frequency converters provides excellent opportunities to improve the grinding process used in the minerals industry. The development of several dedied and advanced operationalABB commissions mill drives at Detour Lake gold mine in November 13, 2013 – ABB commissioned four lowspeed dual pinion drive systems at the Detour Lake gold mine in Ontario, Canada. These systems include the largest lowspeed dual pinion mill drives in the world. The lowspeed concept operates without a gearbox, with motors driving the pinions
Gearless AG/SAG mills Variable speed capability Removal of limits of design power gear and pinion drives are practically limited to about 10,000 hp per pinion. at this time, there is no reasonable gear drive alternative for more than two pinions or above 20,000 hp. the best solution is the gearless mill. Very high drive efficiency Low maintenance requirementsMILL ELECTRIFICATION – EXTRACTION CONTROLMILL ELECTRIFICATION – EXTRACTION CONTROL Mill drives and transmission is an important due to – MILL ROLLERS • A set of High Speed and Slow Motor Gear Trains is used to achieve the eventual operating speed and the power requirement at the mill.
TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS low speed motors connected to a pinion driving a ring gear, two low speed motors connected to two pinions and driving a ring gear, or a gearless motor mounted directly onto the mill. In addition, a gearbox can be used to reduce the speed of a high speed motor. This gearbox is then placed between the high speed motor(s) and pinion(s) and theMarland CECON Clutch for Steel Mill Cooling Fan DrivesA leading industrial fan OEM needed a clutch solution for a large cooling fan installed at a steel mill. The heavyduty fan required a lowspeed turning gear drive that keeps the fan impellers rotating slowly when the main drive is shut down.
BALL MILL DRIVE MOTOR CHOICES artecmachine.comThere have been quite a number of mill drives over the years. In North America, the most common drive in the past has been the low speed synchronous motor driving through an open pinion and bull gear. When utility softness was a concern, the supersynchronous motor was used. In other parts of the world, the wound rotor motor was preferred.MILL ELECTRIFICATION – EXTRACTION CONTROLMILL DRIVE AND TRANSMISSION Turbine – 3,000RPM Prime Mover – 6RPM MILL ROLLERS • A set of High Speed and Slow Motor Gear Trains is used to achieve the eventual operating speed and the power requirement at the mill. • These conventional drives are not only cumbersome occupying huge space but also needs high maintenance and operating cost.
ABB technologies that changed the world Translate this pageABB's variablespeed drives control the speed of electric motors to match the task in hand, In 2008 ABB's installed base of lowvoltage drives saved an estimated 170SIMOTICS HV Series Metals Drive Technology SiemensSIMOTICS HV Series Metals For the highest continuous quality – Rolling mill main motors for a maximum reliability, precision and dynamic performance High voltage synchronous motors specifically designed for main rolling mill drives set themselves apart as a result of their extremely smooth running properties and dynamic performance.
MILL ELECTRIFICATION – EXTRACTION CONTROLMILL DRIVE AND TRANSMISSION Turbine – 3,000RPM Prime Mover – 6RPM MILL ROLLERS • A set of High Speed and Slow Motor Gear Trains is used to achieve the eventual operating speed and the power requirement at the mill. • These conventional drives are not only cumbersome occupying huge space but also needs high maintenance and operating cost.Continuous innovation in large drives for rolling millsfor lowoutput as well as highoutput appliions such as marine propulsion systems. SIMOVERT CONVERTERS Simovert D cycloconverters and Simovert ML2 voltagesource DClink converters are the first choice for highoutput rolling mill main drives. The Simovert D is a cycloconverter for lowspeed, highly dynamic drives of about 5MW and higher.
Low Speed Spindle Motor For Cnc, Low Speed AlibabaAlibaba.com offers 291 low speed spindle motor for cnc products. About 34% of these are machine tool spindle, 7% are ac motor, and 1% are inverters & converters. A wide variety of low speed spindle motor for cnc options are available to you, such as free samples.Marland CECON Clutch for Steel Mill Cooling Fan Drives A leading industrial fan OEM needed a clutch solution for a large cooling fan installed at a steel mill. The heavyduty fan required a lowspeed turning gear drive that keeps the fan impellers rotating slowly when the main drive is shut down.
High Torque Planetary Gears PBLZ for Ball Mill Central RENK epicyclic gears are used e.g. in central ball mill drives since 1974 when RENK has supplied the first epicyclic gear for a 2,5 MW ball mill featuring 2 planetary stages each with three Planetary design (low speed stages) High torque Parallel shaft gears and to deflect under torque affecting the load pattern and are ultimately heavyABB RingGeared Mill Drives Power & Transmissionspeed solution—i.e., a combination of frequency converter and squirrelcage induction motor. Or, the ABB lowspeed solution— including a frequency converter and brushless synchronous motor—eliminates the costly gearboxes of the highspeed solution. Both solutions start with the motor directly coupled to the mill—thus elim
Mechanical Drives Siemens（机械驱动西门子）.pdfTranslate this pageMechanical Drives /fom Contents P4 P13 MD in ChinaABB wins contract for world's largest low speed dual ABB's scope of supply includes four sophistied dual pinion low speed mill drive systems for two semiautogenous (SAG) and two ball mills, each consisting of synchronous motors, a converter transformer and a frequency converter ACS6000 including active rectifier units who will allow the mill drives to achieve a power factor of 0.90 leading.
Ringgeared mill drives Grinding ABBRingGeared Mill Drives Flexible and smooth operation Brochure (English pdf Brochure) Copper Mountain: Overview on the grinding mills and their dual pinion mill drives (English pdf Technical publiion) Measuremens at a state of the art 2x5 MW dual pinion mill drive (English pdfNGC Gears Global expert in gearboxes and power NGC Gears is a Business Division of Nanjing High Accurate Drive Equipment Manufacturing Group Co., Ltd. (NGC Group). NGC Gears is positioned as a global expert in gearboxes and power transmission solutions.