• Welcome to STK

    Founded in 1987, STK has attained 124 patents during the production of crushers & mills over the past 30 years. 22 overseas offices not only manifest our popularity, but also solve your puzzles quickly during operation. So if you are looking for crushers or mills, STK deserves your attention!

    More About CNcrusher
  • 600,000 m2 of Production Bases

    By 2016, STK has built 6 world-class manufacture bases, which cover a total area of over 600,000m2, and accomplished an annual production value of RMB 5 billion.

    More About CNcrusher


Gearless Mill Drive Protection Improvements and Its ...

Abstract—A cycloconverter-fed gearless mill drive is a drive ... Laguna Seca concentrator uses a SAG mill and three ball mills, all driven by gearless mill drive (GMD) systems. Table 1 gives ... Gearless Mill Drive Protection Improvements and Its Behaviour at Minera Escondida Ltda. ...

Get Price


First use of Sinamics SL150 cycloconverters for grinding ...

Oct 26, 2010· Quadra FNX Mining Ltd., a Canadian mining company, has commissioned Siemens to modernize the drive in an SAG mill in its Robinson open-cast copper mine in Nevada, USA. This will be the first time that an ore mill is to be equipped with a Sinamics SL150 cycloconverter…

Get Price


Semi-autogenous grinding (SAG) mill liner design and ...

Semi-autogenous grinding (SAG) mill liner design and development D. Royston ... proportion of SAG mill power and this proportion falls as the liners wear (and lifting capacity falls) even when mill speed ... mill is equal to twice the number of the feet in the mill shell diameter (e.g., a 34-ft-diameter mill shell would have 68 shell ...

Get Price


Modernization down under - Siemens upgrades gearless ...

Siemens has modernized a gearless grinding mill drive at Newcrest Mining Limited owned Cadia Valley Operations, near Orange in New South Wales, Australia. This was the first time that a gearless grinding mill had been equipped with a Sinamics SL150 cycloconverter control. The modernization concept developed by Siemens allowed for most of the existing electrical equipment to be retained, thus ...

Get Price


sag mill jacking cradle - ellul.nl

sag mill jacking cradle auroracollege. sag mill cerro corona cycloconverter for sag mill 38 feet copper sag mill manufacturers in india ball mill and sag mill liner manufacturer gauteng jhb. More Details. Optimum SAG Mill Discharge Density Grinding . Get Price

Get Price


Modeling and Evaluation of Cycloconverter-Fed Two-Stator ...

Abstract: Typical drive configurations of high-capacity SAG mills use a two-stator-winding vector-controlled synchronous motor, with a 30° shift between the two windings, fed by a two-secondary delta-delta-wye power transformer and two six-pulse cycloconverters. This paper presents and evaluates three different modeling options for the SAG mill drive.

Get Price


Input current waveform in a 12-pulse cycloconverter - YouTube

Oct 06, 2013· Input current waveform in a 12-pulse cycloconverter. Chilean SAG Mill application (over 20000 HP). Channel 1: Va Channel 2: Ia.

Get Price


Design review of Gearless Mill Drives

downtime (Dugalic and Tischler). The sheer size of the mill shell is increasing steadily with operating mill having diameters of 12.2 meters (40 feet) and currently a mill being ordered with diameter of 12.8 meters (42 feet),28 Mega Watt motor, expected to operate in late 2014, early 2015 (Orser, et al). Figure 2 shows a gearless mill.

Get Price


First use of Sinamics SL150 ... - International Mining

Installation of a Sinamics type SL150 cycloconverter is the center-piece of the modernisation of the ore mill in the Robinson mine. The Simine Mill GD solution concept for gearless mill drives and twin-pinion mills enables analogue or early digital control systems to be replaced without also having to replace the motor or transformers.

Get Price


sag mill plant project - ristorantecaminetto.it

SAG Mill - Feed The Beast Wiki. The SAG Mill is a block added by the EnderIO mod. A machine similar to a Pulverizer or a Macerator. It is used to process resources to produce dust. It accepts energy in the form of Redstone Flux or Minecraft Joule, with an internal buffer …

Get Price


The behavior of the cycloconverter fed gearless drive ...

simulation does not consider the closing of the mill brake and the stop of mill and motor. In reality, the mill continues turning in case of a mains power outage due to its inertia until the brake applies or it moves until its kinetic energy is consumed by friction. The application of the brake is realized by the PL C of the gearless drive, as soon

Get Price


ABB Commissions Gearless Mill Drivers, Shares Fall ...

Jun 16, 2014· The company had received this contract in 2011 to provide GMD for 3 mills - a 36-feet 12 megawatt (MW) GMD required for the semi-autogenous (SAG) mill and a couple of 22-feet …

Get Price


HOME >> Product >>coal plant organic efficiency

cycloconverter for sag mill feet; knive grinding machine india; SOLUTIONS. coal ore plant for sale; coal mill installations in thermal power plant; indias coal crushing plant; coal mill in cement plant; coal processing plant crusher; coal circuit in a cement plant

Get Price


aplikasi cycloconverter pada cement mill drives

aplikasi cycloconverter cement mill drives - yogorinomons.be. cycloconverter for sag mill 38 feet Cycloconverter For Sag Mill 38 FeetCycloconverter For Sag Mill 38 Feet fungsi vibrating screen pada aplikasi cycloconverter cement mill drives speed of cement mill drive Mining The Chat With Sales Smart Mill Pada Cement Mill welfareconsultants smart mill pada cement mill aplikasi -cycloconverter ...

Get Price


library.e.abb.com

SAG, ball and cement mill chives, etc Experience to exceed your demands ABB has experience in cycloconvetter chives, having delivered about one third of the world's cycloconverter power. ABB cycloconvelters were used in 1969 for ring motor drives on cement mills and later also with marine propulsion, mine hoist and It)lling mill main drives.

Get Price


ABB commissions first gearless mill drives project in ...

May 26, 2011· ABB commissions first gearless mill drives project in Canada ... group. The GMD powers a 38′ (SAG) mill at the Canadian Malartic gold mine. ... the new powerful ABB cycloconverter …

Get Price


Cycloconverter - Wikipedia

CCVs are used for driving mine hoists, rolling mill main motors, ball mills for ore processing, cement kilns, ship propulsion systems, slip power recovery wound-rotor induction motors (i.e., Scherbius drives) and aircraft 400 Hz power generation. The variable-frequency output of a cycloconverter can be reduced essentially to zero.

Get Price


Aplikasi Cycloconverter Pada Cement Mill Drives

HOME >> Product >>cycloconverter for sag mill feet. SAG, ball and cement mill chives, etc Experience to exceed your demands ABB has experience in cycloconvetter chives, having delivered about one third of the world's cycloconverter power. ABB cycloconvelters were used in 1969 for ring motor drives on cement mills and later also with marine ...

Get Price


ABB gearless mill drive system will power world’s first 42 ...

The contract includes the engineering for a 28 megawatt GMD system for a 42 feet SAG (semiautogenous) mill, the world’s largest mill in diameter. In addition, it includes the engineering for two 15.6 megawatt GMD systems for two 26 feet ball mills.

Get Price


sag mill gearless drive - studiareacrema.it

Utah, SAG mill and a 11,200 kW gearless drive for the El Teniente, Chile, SAG mill. In a continued call for larger, even more powerful drives, Siemens kept pace. In 1996, ordered the first gearless drive for a 38-foot SAG mill located at the company's Grasberg plant in Indonesia. This gearless drive … Contact Supplier

Get Price


infrared sag mill pinion - jazzneersel.nl

Decision Support Models for the Maintenance and Design of Mill ... The ore grinding mill (see figure 1.1) is a critical component in the grinding process and is ..... the infrared source and detector on the same side of the product to be ... is equal to 5.647 and 23 gear teeth on the pinion gear of the mill and 292...

Get Price


Modernization down under - Siemens upgrades gearless ...

This two-stage grinding circuit consists of a 40 ft SAG (semi-autogenous grinding) Mill with a 20 MW Siemens gearless drive and two parallel 10 MW gear driven ball mills. Siemens has now fitted the SAG mill with a Sinamics SL 150 cycloconverter for closed-loop control as well as with a Sinamics DCM control module for the excitation circuit ...

Get Price


Operation of High-Power Cycloconverter-Fed Gearless Drives ...

PONTT et al.: OPERATION OF HIGH-POWER CCV-FED GEARLESS DRIVES UNDER ABNORMAL CONDITIONS 815 Fig. 2. Power circuit of synchronous motor with two stator windings that are fed by a 12-pulse CCV. TABLE I PARAMETERS OF ATYPICAL SYNCHRONOUSMOTOR FOR ASAG MILL APPLICATION Fig. 3. Waveform of voltages and currents in the stator at steady state

Get Price


Reprint - industry.siemens.com

The cycloconverter de-livers variable frequency to the Ring Motor of the gearless drive, changing its speed by variation of fre-quency. Cycloconverter technology has been in exis-tence for more than 50 years. Over these years many types of variable frequency converters have been developed, but none has replaced the cycloconverter

Get Price


Gearless mill drives - Grinding | ABB

ABB’s GMD is the most powerful mill drive system in the market to power semiautogenous (SAG), ball and autogenous (AG) mills, This ’workhorse’ for grinding operations combines a robust, service-friendly and fit for purpose design to provide highest throughput, reliability …

Get Price


gearless mill drive system - greenrevolution.org.in

ABB’s delivery included one gearless mill drive system (GMD) for a 40-feet semi-autogenous mill and two low-speed dual pinion ring-geared mill drive systems (RMDs) for two 26-feet ball mills; making Mount Milligan’s grinding circuit one of the most advanced and powerful in North America. Read more

Get Price


Three ABB gearless mill drives up and running at Mina ...

First awarded in 2011, the scope of supply of the order included three GMDs, one 36-feet 12 megawatt (MW) system for the semi-autogenous (SAG) mill and two 22-feet 8.9 MW systems for both ball mills.

Get Price


Siemens modernises SAG mill gearless drive in Cadia Valley ...

Siemens has now fitted the SAG mill with a Sinamics SL 150 cycloconverter for closed-loop control as well as with a Sinamics DCM control module for the excitation circuit – the first time that both types of converter have been used in a gearless drive.

Get Price


Current Issues on High-Power Cycloconverter - fed Gearless ...

For example, a SAG mill with an internal diameter of 11 meters will have a critical speed of 12.72 [rpm]. For a Fig. 4, 12-Pulse connection. Twin 6-Pulse cycloconverter-fed synchro-nous machine with 2 stator windings (Shown only one stator A1-B1-C1 winding connected). Fig. 5, 12 Pulse cycloconverter fed synchronous machine with

Get Price


Current issues on high-power cycloconverter - Fed gearless ...

Current issues on high-power cycloconverter - Fed gearless motor drives for grinding mills ... The interior of a SAG mill is shown as ... Various features of the cycloconverter's input current in ...

Get Price


Cycloconverter - an overview | ScienceDirect Topics

In Electrical Systems and Equipment (Third Edition), 1992. 2.4.1 Cycloconverter. A cycloconverter converts the mains frequency into a variable frequency directly through a one-step conversion process. This is the essential difference from other types of converter described later, where the line power is first converted to DC and then to variable-frequency through an inverter.

Get Price


ABB ring geared mill drives - YouTube

Jun 05, 2013· We provide optimized mill drive solutions for all types of ring-geared mills: low and high speed, single and dual pinion, with and without a gearbox — all designed for reliable, long life and ...

Get Price

Leave a Comment