-
- دوشنبه تا شنبه: 10:00 - 16:00 / یکشنبه تعطیل است
drive application is a dual-pinion SAG mill driven by two 5,000 kW wound rotor induction motors (WRIM). Two TMdrive-10SPRs control motor speed by recovering rotor current and returning the power to the utility supply. Configured in a twin motor arrangement, the motors share load in the tandem mill. The Customer Need
به خواندن ادامه دهید
Inventory ID: 6C-HM03. UNUSED FL 36' x 24' (11m x 7.3m) Dual Pinion SAG Mill with 2 ABB 9,000 kW (12,069 HP) Motors for Total Power of 18,000 kW (24,138 HP)
به خواندن ادامه دهید
According to ABB, the upgrades to Vale's existing Clarabelle dual pinion semi-autogenous (SAG) mill will allow it to reduce the size of the ore at the company's nickel and copper mines in the ...
به خواندن ادامه دهید
in single- and dual-pinion configurations. These drives are well-suited for all type of mills and ball mill ap-plications, and are able to cover the power range up to the mechanical limit of the gearbox or the ring gear. The solution provides ad-justable speed for AG and SAG mills, or the opportu-nity to tune the speed of the
به خواندن ادامه دهید
Description. This gold mine was the first to install Mill Safe Start Systems on both their Ball mill (dual pinion 14 MW) and Sag mill. We actively monitored these mills ever since.
به خواندن ادامه دهید
22' x 41.6' Fl Dual Pinion Regrind Ball Mill, 2 Abb 5500 KW (7375 HP) Drives For Total Power Of 11, 000 Kw (14, 750 Hp), new A M King Industries | Oroville, CA | Albert King | 530-53...
به خواندن ادامه دهید
Conga: The world's first 42-foot diameter 28 MW gearless SAG mill (English - pdf - Technical publication) Copper Mountain: Overview on the grinding mills and their dual pinion mill drives (English - pdf - Technical publication) Insurability of large gearless mill drives (English - pdf - Technical publication)
به خواندن ادامه دهید
Testing Failure Criteria for Grinding Mill Structures. The continuation of this trend, in spite of occasional mill failures, in both the SAG and ball mill areas, requires a requestioning of some basic design philosophies up to now utilized for large mills.
به خواندن ادامه دهید
The grinding circuit consists of a primary 10.4 m x 5.8 m long EGL SAG mill with a dual pinion 12,500 kW drive (2 x 6,250 kW) for primary grinding. The SAG mill discharges onto a horizontal double deck vibrating screen. The top deck has 12 mm openings and the bottom has six millimetres openings.
به خواندن ادامه دهید
Then, in the late 1980s when the price of copper rose quickly from a low of $0.62/lb to a high of $1.62/lb, this substantial increase in price further fuelled the industry demand for larger diameter SAG mills, with mill power quickly doubling from 15,000hp to 30,000hp (11,000-22,000kW). 4 Emerging Trends Driven by the Global Mining Boom.
به خواندن ادامه دهید
Ball/Sag/AG Mill, Roller Press HPGR/HRC The dual pinion drives in a mill can come out of sync due to power problems, or disturbances in the motor control system. Another common problem is frozen charge that has built up inside. This might cause torque peaks or consequential damage.
به خواندن ادامه دهید
what is lrs in ball mill - verhuur-doms.be. Advantages of SER drives for SAG mills Friday, December 19, 2014 For large mills requiring variable speed, the wound rotor motor and SER drive are economical for a total rating of approximately 2MW to 16MW. Above 16MW, the gearless drive (cyclo-converter) is typically used because gearboxes and pinion ...
به خواندن ادامه دهید
twin pinion or dual motor and pinion installation. 6. Power demand exceeds 14 MW. This puts the application in the realm of a single mill with gearless drive or, possibly, twin motors each with a twin pinion. See later discussion on aspect ratio. If the aspect ratio is …
به خواندن ادامه دهید
the mill gear in inching mode N o_mill is the actual output speed of the mill gear in normal running mode P mill_motor is the actual power of the main drive motor or 2 x main drive motor for dual pinion drives. The power computed above is considered P inch = …
به خواندن ادامه دهید
ONTARIO – ABB, the leading power and automation technology group, has commissioned an upgrade to Vale's existing Clarabelle dual pinion semi-autogenous (SAG) mill.The project was completed on-time and on-budget with an excellent safety record. The Clarabelle mill beneficiates nickel-copper ore from various sources and companies and to …
به خواندن ادامه دهید
By mill we refer to Ball Mills, Rod Mills and SAG Mills. Anything gear and pinion really. The discharge end of the mill; For the operator this only becomes a problem should the bolts that hold the liners in begin to leak water and ground rock. …
به خواندن ادامه دهید
A SAG mill requirement might be 225-250% torque based on Full Load Motor Torque (FLMT). This is the amount of torque the drive motor can produce on a temporary basis during start up. ... The clutch's primary role on the dual-pinion, direct-drive geared mill is to provide smooth starts during mill startup. When the mill is running, the clutch ...
به خواندن ادامه دهید
Figure 1 – Top view of SAG mills with alternative drive options; left side: dual pinion drive including motor, gearbox, pinion and girth gear; right side: gearless ring motor Declining ore grades, leading to increased material transport and plant throughput requirements, are one of the
به خواندن ادامه دهید
Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills …
به خواندن ادامه دهید
DUAL PINION MILL DRIVES The SAG and the two ball mills are gear driven and Copper Mountain selected the sophisticated low speed dual pinion mill drives from ABB to drive these mills. Brief History Sophisticated Dual Pinion Mill Drive Technologies About five years ago, ABB was already the market leader for Gearless Mill Drives (GMD).
به خواندن ادامه دهید
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.
به خواندن ادامه دهید
UNUSED FL 36' x 24' (11m x 7.3m) Dual Pinion SAG Mill with 2 ABB 9,000 kW (12,069 HP) Motors for Total Power of 18,000 kW (24,138 HP) …
به خواندن ادامه دهید
The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill's ...
به خواندن ادامه دهید
• Less bearing clearance and thus less mill shell deflection polysius ® ball mill with direct drive There are two types of gear unit available for the mill drive unit. For higher drive powers, the combiflex ® gear unit is the unit of choice. The combiflex has an output of up to 8,000 kW, and with a dual drive up to 16,000 kW.
به خواندن ادامه دهید
pinion systems to 8 MW per pinion and dual motor systems with quadruple pinions extend the range of gear driven mills to a theoretical limit of 32 MW. The Ernest Henry SAG mill (11 MW) is currently the largest twin pinion single drive mill installed in Australia. Problems have been experienced with the twin pinion drive at Fimiston and with the ...
به خواندن ادامه دهید
We are essentially providing up to twice the power transmission of a conventional dual pinion drive. Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing Outotec to produce the world's largest SAG mill of 42' in diameter drawing power at 28 MW. Today, Outotec is the world leading supplier ...
به خواندن ادامه دهید
ABB was contracted to provide power technology equipment for the project. The company supplied the gearless mill drive for the SAG mill, as well as two dual pinion mill drives for ball mills. ABB also provided transformers, motors, electrics and synchronisers under a C$28m contract awarded in May 2009.
به خواندن ادامه دهید
Dual hydraulic inching drives provide a much safer and ... SAG mill conference, provided details of the then largest gear drive in operation on a SAG mill (34ft x 18ft) at ndida 13.4MW, which ... of pinion and axial forces. For mill drives a 25° pressure angle is
به خواندن ادامه دهید
The need for reliable and robust grinding solutions is driving the development of new technologies able to cope with larger equipment generating higher throughput. If in the past single pinion mills were enough to process all material, today dual pinion or gearless driven mills are necessary.
به خواندن ادامه دهید
design mill speed, and the maximum design ball charge volume (Barratt, 1989). For single pinion and dual pinion drives, with 21 MW now a distinct possibility, the probability of pinion changes to a higher mill speed should always be considered when set-ting gear ratios, service factors, and motor power ratings.
به خواندن ادامه دهید