Tag Archives: TAKRAF

TAKRAF India wins bucketwheel excavator maintenance work from India’s NLCIL

Bulk handling, Equipment maintenance, Mining equipment, Mining services,

TAKRAF India says NLC India Limited (NLCIL) recently awarded the company with four new orders for the revamping and maintenance of various bucketwheel excavators (BWEs).

NLCIL, incorporated in 1956, is a public sector company of the Government of India and one of the country’s largest lignite and power producers. As a Navratna entity, NLCIL has also been bestowed a prestigious status given to only a few select Indian Public Sector Undertakings, and as such has enhanced financial autonomy.

NLCIL operates three open-pit mines with a total installed capacity of 28.5 Mt/y at Neyveli, Tamilnadu, India.

Two of the orders awarded to TAKRAF India concern the major revamping of both mechanical and electrical portions of one 1,400 litre (1.4 cu.m) BWE and two 700 litre (0.7 cu.m) BWEs for other OEM supplied equipment in NLCIL’s mines.

The principal purpose of the revamping orders is to extend the operational life of the equipment.

The remaining two orders concern two maintenance contracts (mechanical and electrical respectively) with the equipment details as follows:

  • Two 1,400 litre BWEs originally supplied by TAKRAF; and
  • Three 1,400 litre BWEs originally supplied by another OEM.

The main purpose of the maintenance order is to reduce downtime and ensure equipment availability.

Gopal Kalyanakrishnan, Managing Director of TAKRAF India, said: “Our collaboration with NLCIL dates back more than 30 years and the newly awarded contracts are indicative of the trusting relationship between NLCIL and TAKRAF India. I sincerely thank all colleagues for their hard work and efforts. We look forward to commissioning the orders and continuing to work together to best support the needs of NLCIL in the future.”

The successful and ongoing collaboration between NLCIL and TAKRAF India dates back to the 1980s. Since then, several orders have been successfully commissioned. The orders range from the supply of various 700 and 1,400 litre BWEs, spreaders (capacity ranging from 11,000 t/h to 20,000 t/h), a mobile transfer conveyor, various stockyard equipment to similar revamping orders that TAKRAF India commissioned in 2018 and 2021.

TAKRAF and ABB renew gearless conveyor drive technology partnership

Base metals, Bulk handling, Mining equipment, Mining services, , , , ,

TAKRAF and ABB have renewed their ongoing strategic partnership regarding the deployment of gearless conveyor drive (GCD) technology on TAKRAF bulk material handling solutions to enable a more sustainable and resource-efficient future, the companies say.

The partnership, which dates back to 2011, acts as a commitment to both groups’ efforts in achieving a more sustainable and resource efficient future, regarding the deployment of GCD technology.

Gearless drives eliminate the need for a gearbox, hereby significantly reducing the number of wear parts, which results in increased efficiency and reliability, as well as reduced maintenance requirements. Further advantages include a considerable reduction in the drive system’s footprint and emissions. In fact, for a large copper mine in Chile, studies showed that CO2 emissions were reduced by 66% as compared with diesel truck engines for the same copper production volume, TAKRAF states.

In 2019, TAKRAF delivered equipment for the principal ore transport system for Chuquicamata, one of the world’s largest copper ore mines, moving ore extracted underground to an above-ground processing plant using GCD technology (11 x 5 MW gearless synchronous motors). This system, boasting a total installed drive power of 58 MW, transports crushed copper ore from underground storage bins to the surface along a 7 km underground tunnel that overcomes 1 km of vertical elevation. Once on the surface, the ore then travels along an overland conveyor that transports it the final 6 km to the distribution silo.

Thomas Jabs, TAKRAF Group CEO (third from the right, shaking hands with Frank Kschamer (ABB Head of Sales Mining Germany)), said: “We are proud of our ongoing partnership and association with our drive technology partner, ABB. This is a relationship that dates back more than 12 years and has resulted in some incredible technology achievements, not to mention delivery of the world’s most powerful belt conveying system at Chuquicamata using GCD technology. GCDs bring numerous benefits, which are important to us as a company and the complete solution offering we present to our clients. With decreasing ore grades, ever-deeper mines and a general tendency to move from an open-pit operation to underground, powerful, efficient and small footprint conveyor drives will only become more important in an industry in which safety and sustainability are also increasingly important.

“We look forward to this new chapter and, together with ABB, look forward to future GCD installations.”

TAKRAF successfully delivers DELKOR tailings thickeners to Moolarben CHPP

Coal technology, Mine operation news, Mining equipment, Mining services, Water management, , , , , ,

TAKRAF Australia says it has successfully supplied, delivered and commissioned a 30-m diameter DELKOR tailings thickener for the Moolarben Coal Handling & Preparation Plant (CHPP) in New South Wales, Australia.

The Moolarben complex, on Australia’s East coast, is operated by Moolarben Coal Operations Pty. Ltd., which is a joint venture between Moolarben Coal Mines, Yancoal Moolarben Pty. Ltd. and a consortium of Korean power companies. The complex consists of four approved open-pit mining areas, three approved underground mining areas and other mining-related infrastructure.

Notwithstanding challenging global conditions due to the COVID-19 pandemic, the project kicked off in late 2021. Despite a variety of challenges surrounding the pandemic, the thickener was delivered in mid-2022, with installation taking place a few months later, TAKRAF explained. A few months after installation, and the thickener was successfully commissioned in early 2023, with continued and successful operation ever since, it says.

Raymond Leung, Sales Manager, DELKOR, said: “Our DELKOR thickener is a proven performer across a variety of applications. The benefits of our DELKOR thickeners include their low capital cost, smaller footprint, effective use of flocculants and advanced automation.

“One of the standout features of this project is the great collaboration between our DELKOR Product & Service Center in Bengaluru, our DELKOR specialists both at our client and at our various TAKRAF Australia office locations, and our committed suppliers. I would like to thank all stakeholders for their commitment in overcoming all challenges related to this project.

“This project again serves to underline our group’s global solutions capabilities and our ability to deliver, and will serve us in good stead as an important future thickener reference in Australia.”

TAKRAF solidifies stockyard equipment market presence with bucket-wheel reclaimer order

Bulk handling, Mine operation news, Mining equipment, , ,

A recent contract for a bucket-wheel reclaimer (BWR) from a highly valued customer in South America has, TAKRAF says, reinforced the company’s position as a leading global provider of stockyard equipment and an important machine supplier to this client.

The scope of the contract in question covers basic and detailed engineering, fabrication, delivery to site and site services supervision.

The BWR was ordered from TAKRAF Brazil and is designed to reach a capacity of 7,200 t/h.

Tiago Carvalho, Managing Director: TAKRAF Brazil, said: “TAKRAF is proud of its extensive working relationship with this client having supplied many machines for a number of its global operations over the years.

“We are recognised as a world-leading technology brand when it comes to mining and bulk material handling solutions, with a specific focus on high capacity and/or complexity. Our solutions are designed to cater to our clients’ unique requirements and we are able to supply individual machines or complete integrated systems.”

DELKOR’s MAXGen-equipped BQR flotation cells gain traction in mineral processing space

Base metals, Energy minerals, Industrial minerals, Metallurgy, Mineral processing, Mining equipment, Mining services, Precious metals, Steel and iron ore, , , , , , , , , , , ,

TAKRAF Group says it is registering strong demand for its new generation DELKOR BQR flotation cell, now equipped with the MAXGen mechanism for best-in-class metallurgical performance across a wide range of commodities.

Its MAXGen-equipped cells were first commercially applied at a cement works in India, in order to maximise limestone recovery. In other, more recent orders, the cells are being applied across a range of commodities with the technology selected for both its superior metallurgical performance, as well as DELKOR’s ability to provide a cost-effective and customised solution, the company said.

The string of recent orders includes 12 BQR flotation cells for a fluorspar processing plant in Spain. Here, the cells are equipped with eDART internal dart valves for the larger cells and external pinch valves for the small cell. eDART valves are known globally for their superior and safe design, TAKRAF said.

Five BQR flotation cells are also being used for the processing of iron ore in Honduras.

As part of an economically viable package, the cells were supplied with a reagent system and an air blower, as well as conductivity-type level sensors for accurate froth level detection and control, TAKRAF said.

The company also dispatched 11 BQR flotation cells for two gold mines in Australia.

Special features of this application included a dual outlet froth discharge box with dart plugs to divert the froth to different pipelines based on the metal grade of the froth. In addition, adjustable froth lips enable flexibility of froth discharge into the launders. Given the high ultraviolet (UV) levels of the environment, UV resistance paint was provided to protect the rubber lining, the company added.

In South Africa, four BQR flotation cells for iron ore recovery from a zinc, lead, silver and copper concentrator tailings stream were installed.

At this operation, a built-in cell by-pass system with external dart valves and a backpressure pipe were included in the flotation circuit. The bypass system allows bypassing of a cell for maintenance without having to shut the circuit down completely, while the rest of the cells can keep running with a proportionately reduced flow rate, TAKRAF explained. Backpressure piping ensures consistent slurry level management in the last cell, resulting in superior circuit metallurgical performance, meanwhile.

Finally, six BQR flotation cells were supplied for a nickel restart project in Australia. Features include a dual outlet froth discharge box with dart plugs, adjustable froth lips and a gearbox drive for the largest cell. UV resistant paint was also provided to protect the rubber lining.

Rajiv Krishnamurthy, Sales Manager – Europe DELKOR Products, said: “Our MAXGen mechanism is the result of extensive research and development. Our mechanism provides superior recoveries with higher mineral grade, along with faster flotation kinetics, which is achieved by generating favourable bubble size distribution and energy efficient hydrodynamics in the cell.

“Other outstanding benefits include the rotor and stator configuration, which enables the rotor to operate at a lower tip speed, reducing operational costs with lower power consumption and wear. These benefits also going a long way to supporting our group’s sustainability efforts.”

He concluded: “The demand for our new generation cells is testimony both to the excellence of our in-house developed technologies, as well as our global team’s commitment to providing our clients with a solution that exactly meets their needs. These projects are a great reference for DELKOR and serve to entrench our new generation flotation cells as a premier global flotation technology.”

TAKRAF’s first Dry Stack Tailings system commissioned in Brazil

Comminution of minerals, Environmental, Mine operation news, Mineral processing, Mineral project development, Mining equipment, Mining services, Steel and iron ore, Sustainable mining, Water management, , , , , , ,

The first DELKOR Dry Stack Tailings (DST) system to be supplied by TAKRAF Group in Brazil is being commissioned for one of the largest steel producers in the Americas, the company says.

The order for the key equipment for the DST system was awarded in January 2019 and was followed shortly by an order being placed for the supply of a TAKRAF stacker.

The project comprises the following equipment to process iron ore tailings:

  • Flocculant plant;
  • Coagulant plant;
  • 35 m diameter DELKOR high rate thickener;
  • 300 sq.m slurry tank with agitator;
  • Four double-stage centrifugal slurry pumps;
  • Four DELKOR overhead beam filter presses (FP OH): 2 m x 2 m plates;
  • Four compressors with tanks (process and instrument air); and
  • Four TAKRAF belt feeders.

As part of the client’s initiative to improve the sustainability of its operations, the DST system is being built to enable the filtering and stacking of tailings as the deposit area of the existing tailings dam reaches full capacity by year-end.

In addition, by removing most of the water present in the tailing slurry, enabling the material to be safely stacked, the client can benefit from a secure and environmentally friendly approach to tailings disposal.

“Not only does it obviate the risk of catastrophic tailings dam failures, but also maximises the water recovered for return to and re-use by the beneficiation plant,” the company said.

DST will be applied following beneficiation to treat the tailings generated during the iron ore concentration process by flotation. The raw tailings slurry will be first fed to the thickener where part of the water is already recovered. In the next process step, more water is recovered by the filter press to achieve a moisture level of about 14% (dry basis), thus creating a dry filter cake ready to be deposited.

DELKOR’s equipment is built to withstand harsh mining environmental conditions, with the filter presses designed as an overhead beam type suitable for the prevailing operational conditions, it said. These require, among other features, large volumes of material to be processed and easy access to the filter plates and filter cloths for maintenance.

In line with DELKOR’s holistic solutions approach, the DST system was designed as a fully-integrated dewatering process through sedimentation and filtration, with the material being tested in the lab prior to sizing the equipment.

Tiago Carvalho, TAKRAF Brazil Managing Director, said: “TAKRAF and DELKOR’s world-leading technology and expertise to offer a complete DST solution, together with our outstanding technical proposal, based on comprehensive DELKOR testing during the bid stage and collaboration with specialised partners, were undoubtedly convincing factors in the project award.

“All colleagues involved in this project should be commended for successfully bringing this important DST reference to commissioning. This project serves to reinforce TAKRAF Group as a leading global solutions provider and we look forward to successfully delivering future DST projects.”

TAKRAF X-TREME sizers go the distance at Guinea bauxite mine

Base metals, Comminution of minerals, Mine operation news, Mineral processing, Mining equipment, Mining services, , , , , ,

Three TAKRAF X-TREME class sizers supplied to a large bauxite mining operation in Guinea are, the OEM says, fully delivering on their promise of exceptional reliability and wear behaviour.

Commissioned in late 2018, the sizers had, as of the end of February 2021, crushed more than 27 Mt of bauxite ore and were still operating with their original set of wear parts.

The sizers were supplied as part of an important production expansion project at the mine. This project, awarded in late 2016 to TAKRAF as an EPC contract, encompassed a comprehensive wagon unloading, crushing and conveying system.

The TAKRAF sizers included within the overall system comprised one 3,600 t/h primary TCS-X 14.35 located in the pit beneath the wagon tippler; and two 1,800 t/h secondary TCS-X 08.30 located in the crushing building.

Both the primary and the secondary sizers are from TAKRAF’s X-TREME class sizer range. This range was developed to provide extended reliability and availability through a heavy-duty drivetrain, robust shaft and bearing assemblies, and the use of advanced wear resistant materials.

Ease of maintenance is another advantage of the TAKRAF sizer, with the primary sizer installed on site featuring a bolted tooth system to enable easy and quick replacement when sufficient wear has been experienced, the company says.

Conor Mitchell, TAKRAF Product Manager – Roll Crushers, said: “The combination of high reliability and long lifetime of wear parts means significantly higher machine uptime and that ends up translating into increased productivity for this bauxite operation. These performance levels reinforce that our X-TREME class sizer line provides maximum reliability and availability in difficult conditions, which is something the market has been calling for quite some time.”

Ukraine iron ore miner cuts electricity consumption, process water use with DELKOR thickeners

Environmental, Mine operation news, Mineral processing, Mining equipment, Mining services, Mining software, Steel and iron ore, Water management, , , , ,

As part of its modernisation drive, a mining and processing plant recently installed 3 x 62 m diameter DELKOR high-rate thickeners with a view to reducing electricity consumption by one and a half times for the pumping of tails, as well as rationalising the use of process water.

The project concerns the design, engineering and supply of three DELKOR 62 m high-rate thickeners for the dewatering of iron ore tailings as part of the processing plant’s modernised slurry thickening complex.

This modern complex, of which construction was completed in 2020, has now done away with outdated slurry pump stations, adopting, instead, the efficient process of thickening, hydraulic transport and storage of slurries.

Employing DELKOR’s latest generation feedwell design that comes with improved flocculation together with improved flocculant and slurry kinetics, these elevated thickeners boast large feedwells, which rank as some of the largest ever built, DELKOR says.

Ramesh Mahadevan, Regional Managing Director – DELKOR, had this to say upon successful commissioning of the thickeners: “This project is a very important reference for us in Ukraine. Given current global conditions, working with a new end user is a noteworthy achievement and one for which our entire DELKOR team must be commended.”

TAKRAF, the owner of DELKOR, meanwhile, says there has been strong demand for DELKOR technology in Latin America, noting a recent order for TAKRAF Peru for the supply of 2 x 38 m paste tailings thickeners with a capacity of 455-623 t/h.

The order, placed by a Peruvian entity processing tailings from a nearby iron ore mine, forms part of an expansion to develop a second plant. This will enable the entity to handle more tailings from the mine, according to TAKRAF.

Design requirements for the thickeners include accommodating the process demands for a paste application with a target of 65% +/- 3% solids content for the underflow. This required an equipment configuration that allowed it to operate under an expected yield stress of 200 Pa in the underflow material, the company noted.

TAKRAF dry-stacked tailings test work boost for Los Andes Copper’s Vizcachitas project

Base metals, Comminution of minerals, Environmental, Mineral processing, Mineral project development, Mining services, Sustainable mining, Water management, , , , , , , , , , ,

Los Andes Copper says it has received additional positive results from the ongoing prefeasibility study (PFS) metallurgical test work at its Vizcachitas project in Chile.

These results show improved filtration rates for both the fine and coarse fraction tailings compared with previous testing, it said, reinforcing the decision to adopt dry-stacked tailings at the project.

An October press release regarding PFS metallurgical test work carried out by SGS demonstrated that the Vizcachitas tailings were amenable to being filtered and dry-stacked.

These same coarse and fine representative tailings samples were sent to the TAKRAF laboratories for further settling and filtration assessments. Los Andes said the TAKRAF work tested various settling and filtration parameters, including those previously tested.

The studies demonstrated that for the coarse fraction vacuum filtration, the rates improved from 1.9 t/h/sq.m to 3.4 t/h/sq.m when compared with the previous results. For the finer fraction, the settling velocities improved from 8.4 m/h to 16 m/h and the pressure filtration rates improved from 0.6 t/h/sq.m to 0.7 t/h/sq.m. The expected cake moistures for both filtration technologies were 15%.

These positive results mean that the Vizcachitas project, processing 110,000 t/d of ore, would only need to use eleven standard 162 sq.m belt filters and four 2.5 m x 2.5 m pressure filters for the tailings dewatering operation, Los Andes said, noting that other operations in the world were successfully operating with similar filter arrangements.

“Tailings filtration reduces water consumption by 50% when compared to thickened tailings disposal alternatives,” Los Andes said. “Furthermore, filtered tailings can be handled by trucks, conveyors and shovels, eliminating the need for the construction and operation of a tailings dam.

“The adoption of this technology puts the Vizcachitas project at the forefront of the environmentally responsible practices being adopted for the future of sustainable mining globally.”

ABB, TAKRAF complete commissioning of Chuquicamata conveyor system

Base metals, Bulk handling, Mine operation news, Mining equipment, Mining services, Power supply for mines, , , , , , , , , , , ,

ABB, working with TAKRAF, has completed commissioning and testing of the world’s highest-powered gearless conveyor drive system at the Codelco-owned Chuquicamata copper mine in Chile.

ABB has provided engineering design, gearless conveyor drives (GCD), electrical equipment for power supply, energy distribution and automation of a new underground and overland conveyor system at one of the world’s largest copper mines.

Chuquicamata is currently transitioning from open-pit to underground mining, with the conveyor system, commissioned in just four months, part of a new underground project that is expected to extend operations for the next 40 years.

Project management and engineering for the full electrical, control and instrumentation scope was led by ABB in Germany, with long spells on site in northern Chile to work side-by-side with TAKRAF to equip the site’s new underground operation with a large conveying system that overcomes an altitude difference of 1,200 m and covers a distance of almost 13 km, ABB said.

The three principle 11,000 t/h conveyors feature GCDs equipped with large ABB AC synchronous motors with a rated power of 5 MW each, resulting in a motor shaft torque of about 900 kNm. With every line in constant use, high availability and low maintenance are essential. Designed with a minimum of transfer stations, just one was required underground, saving significant project cost, ABB said.

Based on continuous conveying technology, the infrastructure is completely truck-less, eliminating the need for 120 large haul trucks. This results in saving around 130 million litres/y of gasoline consumption, bringing the carbon emissions from 340,000 t/y down to 100,000 t/y. It is also the first transportation system in the world to employ premium steel cable belt technology, ST10000, for use on uphill tunnel conveyors, according to ABB.

ABB high power motors in position

“This mega project achieves a number of firsts, from the system’s installed drive power to the application of the ST10000 conveyor belt,” Marc Hollinger, TAKRAF Project Manager, said. “With this project, we firmly establish TAKRAF as one of the world’s only providers capable of delivering a mega project of this nature incorporating advanced technologies that push the boundaries of what has been done before. This is a complex project of the highest magnitude demanding global cooperation between internal and external parties.”

Ulf Richter, Global Product Manager for Belt Conveyor Systems at ABB, said: “This is a new milestone in underground applications for continuous mining. It is the highest drive power ever installed on a conveyor and uses a wide range of features for data acquisition, equipment assessment and process optimisation.

“In piloting this gearless drive application with TAKRAF, we have overcome tremendous technical and logistical challenges due to underground situations, elevation change and capacity requirements.”

ABB liquid-cooled MV voltage-source frequency converters, together with large synchronous motors, deliver a decrease in active and reactive power consumption at the operation. This is highly energy efficient, and without additional network filters, it says.

ABB’s Mining Conveyor Control Program ensures smooth belt operation and safe synchronisation between high power motors and high power hydraulic brakes, necessary for secure operation of steep uphill conveyors. The drive systems also work without mechanic backstops, ABB said.

A novel embedding concept, developed jointly by TAKRAF and ABB, enables straightforward installation and alignment of the GCD motors, saving installation time and longer deployment of maintenance teams. This was considered a major benefit compared with existing GCDs in cantilevered construction, ABB said. The concept also meant motors were 100% factory assembled and tested. They can also be mechanically disconnected from the drive pulley quickly so operations can continue if drive failure occurs. The total installed drive power for the entire system, including multiple feeder conveyors, totals 58 MW, of which there are 11 x 5 MW gearless synchronous motors.

ABB has also installed ABB Ability™ Ventilation Optimizer at Chuquicamata reducing carbon emissions and providing clean air to workers in line with the strict health, safety and environment requirements.