mail: [email protected]
mail: [email protected]
Welcome To The SHM Mining Production Base. We Mainly Produce Crushing, Grinding And Related Mining Equipment. If You Have Any Needs, You Can Contact Our Online Customer Service Or Leave A Message Through The Form Below. We Will Serve You Wholeheartedly!
· The equipment was stored in a warehouse on the Rotterdam docks. In December 2001 Gold Fields acquired the St. Ives project near Kalgoorlie and only in 2003 did the new owner decide to go ahead with the project and to install the 36-ft SAG mill and its 13.5-MW gearless mill drive at St. Ives. The pre-commissioned containerized E-house which
Click to chatGearless mill drive (GMD) technology has further expanded the use of large AG 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 of gearless AG mills operating globally.
Click to chatThe SIMINE Gearless mill drives pump system significantly enhances concentrator productivity by eliminating the reducer gear between motor and pump and all corresponding maintenance. In addition the cyclone pumps with variable speed can adjust their energy consumption to the optimized flow of pulp resulting in energy savings of up to 30 .
Click to chat· Fig. 1 depicts a gearless mil drive where the mechanical power is transferred electromagnetically between the stator and poles of the rotor (Errath et al. 2003).Due to the mass flow materials and power involved in the process SAG mills face the problem of high-energy impacts caused by steel balls cataracting against the shell of the mill with loss of energy and accelerated breakage of
Click to chat· The company selected ABB s 26 MW gearless mill drive system (GMD) for the mine s 40 ft SAG mill as well as other drives electrical infrastructure equipment and a long-term service agreement (LTSA). This is expected to reduce operating costs improve process throughput and reliability while saving energy and keep equipment in top form.
Click to chat· SAG mill conference provided details of the then largest gear drive in operation on a SAG mill (34ft x 18ft) at Escondida 13.4MW which began operation in 1995. The reason for not having larger gear drives was due to the limitation of gear manufacturers not having access to larger single piece special alloy castings. To the benefit of
Click to chatRely on our proven track record of SAG and AG Mill superiority. Since the early 1980s we have been designing and manufacturing Semi-Autogenous (SAG) and Autogenous (AG) Grinding Mills under the Fuller-Traylor brand. Semi-autogenous grinding uses a minimal ball charge in the range of 6-15 while autogenous grinding uses ore only.
Click to chat· supplied by Svendborg Brakes for its gearless SAG mill and twin gearless ball mills. The large open-pit mine produces approximately 45 000 tonnes of copper annually. The braking systems for each of the three mills consist of 1000 Series mono-spring caliper disc brakes controlled by a Svendborg Brakes gearless mill hydraulic power unit (HPU).
Click to chat· 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 gears reach their present limit in size.
Click to chat· Cobre Panama is using six ABB Gearless Mill Drives (GMDs) at its recently commissioned copper concentrator in Panama. Two 28-megawatt (MW) GMDs are operating on the 40-ft SAG mills and four 16.5-MW GMDs are employed on 26-ft ball mills along with the associated control systems.
Click to chat· Two 28 MW gearless mill drive systems (GMDS) are operating in the mine s 12-metre SAG mills and four 16.5 MW GMDS are employed in 26 ball mills along with associated control systems. "Gearless mill drives are the workhorses for grinding operations which are at the heart of any mine.
Click to chat· as the absorption of solar radiation. The SIMINE Gearless mill drives sealing system has a proven design incorporat-ing extremely low maintenance with ingress protection that is rated at IP 55 and complemented by a purpose-built rain shield. The outdoor version of SIMINE Gearless mill drives means that a concentrator building is not needed a
Click to chat· General Ball Mill Maintenance. After the mill is erected in order to avoid overlooking both obvious and obscure installation details we recommend the use of a check list. This is particularly recommended for multiple mill installations where it is difficult to control the different phases of installation for each and every mill.
Click to chat· SIMINE Gearless Mill Drivesoutstanding reliability at your hand The Gearless Concept The Gearless Drive avoids any contact between the rotating mill and the static parts of the motor. This enables a contin-uous workflow without maintenance on the gears or the pinions. What used to be downtime is now productive time.
Click to chat· 2 GEARLESS MILL DES The gearless mill drive eliminates ring-gear 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
Click to chat· The SIMINE Gearless mill drives pump system significantly enhances concentrator productivity by eliminating the reducer gear between motor and pump and all corresponding maintenance. In addition the cyclone pumps with variable speed can adjust their energy consumption to the optimized flow of pulp resulting in energy savings of up to 30 . The
Click to chat· Maintenance requirements are considerably lower over the course of a year maintenance activities for conventional drives can constitute up to 5 of the original investment volume. Lubrication and cool-ing systems for the gears as well as maintenance are
Click to chat· Two 28 MW gearless mill drive systems (GMDs) are operating in the mine s 40 foot SAG mills and four 16.5 MW GMDS are employed in 26 football mills along with associated control systems. "Gearless mill drives are the workhorses for grinding operations which are at the heart of any mine.
Click to chat· Gearless mill drives (GMDs) are the workhorse in the mineral processing industries more specifically when it comes to grinding crushed ore and cement (in various production stages) in semi-autogenous (SAG) mills and large ball mills. They are renowned for their excellent reliability and robustness long lifespan and little need for
Click to chatProject engineering service and commissioning for Drive Sytems focused on Gearless Mill Drives (Non-geared mill motors for mining industry grinding applications). Main activities carried out during engineering phase consist on Calculation design review of technical specifications for transformers and 12 18-pulse cycloconverters.
Click to chat· Gearless Mill Drives. GEARLESS DRIVES FOR GRINDING MILLS Gearless Mill Drive (GMD) systems are characterized by having the motor wrapped around the mill like a ring. For this reason they are often referred to as ring motors. The rotor poles are attached directly to the mill (head) flange and hence the rotor becomes an integral part of the mill as shown in Fig. 4. 18
Click to chat· Naturally other maintenance sharing models can be agreed and contractually arranged. One month is just one time frame for maintenance. Further examples exist for other maintenance timing such as the 6 12 and 36 month services defined in the maintenance manual. The frequency of maintenance is proposed in the manuals and can be adapted.
Click to chat· Siemens as a partner for the entire lifecycle of the mining project also supports the user with its wide range of services during the operation of the gearless systems This comprises the joint implementation of an individual and effective service concept including training of users operation and maintenance personnel start-up accompany by field service engineers on site predictive and preventive maintenance
Click to chat· Gearless mill drive system in iron ore processing. ABB was recently contracted to supply gearless mill drive (GMD) systems for two 38 foot semiautogenous grinding (SAG) mills at the Serra Azul iron ore mine in Brazil. The Serra Azul mine unit owned by MMX Mineração e Metálicos an EBX Group company is located in the iron quadrangle of
Click to chat· The SAG Mill Drive is mainly formed by a 11 000 HP. Ring Type Synchronous Motor of double winding fed by two Three–Phased Cycloconverters. The rotor has salient poles without dumping windings and it consists of 72 poles. The cycloconverters work in the out-of-circulation current mode and they are connected to a 13.6 MVA transformer.
Click to chat· Remedial design of the world s largest SAG mill gearless drive. In Proceedings of the SAG 2001 Conference Vancouver Canada. 8 Frank W-D. Gearless drivesExperiences and new/future developments. In Proceedings of the SAG 1996 Conference Vancouver Canada. 9 Orser T. Svalbonas V. Van de Vijfeijken M. 2011. Conga the world s
Click to chatABB 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
Click to chat· Two 28 MW gearless mill drive systems (GMDS) are operating in the mine s 12-metre SAG mills and four 16.5 MW GMDS are employed in 26 ball mills along with associated control systems.
Click to chat· In June 1998 the world s largest grinding mill 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
Click to chat· Semiautogenous grinding (SAG) mills up to 44-ft diameter with 35-MW gearless mill drives (GMDs) are available. In January for example a 1 210-ton AG mill—considered to be the largest ever built—was shipped from the CITIC Heavy Machinery plant in China to the Sino Iron project in Australia.
Click to chatSAG milling extends itself to many applications due to the range of mill sizes available. They can accomplish the same size reduction work as two or three stages of crushing and screening a rod mill and some or all of the work done by a ball mill. SAG mills are also an optimum solution for wet grinding since crushing and screening in these cases can be difficult if not impossible. Efficiency through automatic
Click to chat· Gearless mill drives (GMDs) are the grinding solution of choice in challenging environments. By eliminating bolt-on mechanical components such as ring-gears pinions couplings and gearboxes GMDs offer ore producers unrivalled availability efficiency and durability while reducing operating expenditure according to GMD provider ABB.
Click to chat· The outdoor version of the SIMINE Gearless Mill Drives has been successfully in operation since 1998. The design of the outdoor version takes into account the tough ambi-ent conditions as well as the absorption of solar radiation. The sealing system of the SIMINE Gearless Mill Drives is a proven design incorporating extremely low mainte-
Click to chatsingle gearless SAG mill with 21 500 kW of installed power (at the time of t hestudy this was the highest power available for a gearless drive Constancia sat altitude) and two ball mills with kW of 13 000 installed power each. This would have allowed for a grinding P 80 of 106 microns at a throughput of 76 000
Click to chat· In future two gearless mill drives and Sinamics cycloconverters will be used in the new production line with one SAG mill and one ball mill. Thus one million tons of copper concentrate 10 000 tons of molybdenum and four million ounces of silver oxide can be mined annuallyeven at an altitude of around 4600 m above mean sea level.
Click to chat