Technical Papers

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The importance of good metal preparation to good lagging adhesion

Correct pulley shell surface preparation is essential for good lagging adhesion. Grit blast to a 50-100 um surface roughness and check by measuring at multiple points across the pulley face and around the pulley circumference.

How to Maximise Pulley Service Life

For the past five years, Elastotec has collected data from our network of Approved Applicators on the modes of lagging failure that are seen on pulleys sent for refurbishment.

New Technology Extends Service Life of Non Drive Pulleys and Protects the Conveyor Belt

Mining is an industry where reliability is crucial and unplanned down time can result in millions of dollars lost over a single day. Elastotec is focused in making the conveying process more reliable by eliminating unplanned maintenance due to lagging failure.

New Technology Improves Service Life of Ceramic Pulley Lagging

Elastotec has developed an innovative ceramic pulley lagging system with superior bond strength and outstanding durability, eradicating traditional issues associated with ceramic lagging and making it a unique offering in the market.

Drive Pulley Lagging – The Importance of Proper Technical Analysis and Selection

The performance of drive pulley lagging has become much more important in recent years due to higher torque drives, higher conveyor belt speeds, and the use of ceramic lagging. The popularity of ceramic lagging is due to the reduced risk of drive pulley slip and reduction of lagging wear.

Ceramic Lagging- A Good Thing Can Be Costly If Misused

Ceramic/Rubber composite lagging has gained many fans over the last few years by eliminating drive slip and providing a wear resistance pulley surface. However, like many good things, it has been misapplied in some cases and has contributed to costly problems.

Case Studies

Curragh coal mine – improved service life of conveyor pulleys

The Curragh Coal Mine is an open cut coal mine located near Blackwater in Central Queensland, Australia. The mine supplies high quality, low ash coking coal and has reserves of approximately 90 million tonnes which is amongst the largest in the world. Coal from Curragh is shipped via the Blackwater rail system to the Port of Gladstone for export. Curragh Coal mine is owned by the Coronado Coal Group a US based company.

Oyu Tolgoi High Tension Bend Pulleys – Improved Performance

Oyu Tolgoi is a large copper mine that has both open-cut and underground operations and has been operating since 2013. The mine is jointly owned by the Mongolian government and Rio Tinto and is located in the South Gobi Desert. Once fully operational, the mine is expected to produce 450,000 tonnes of copper annually.

PU Lagging Metso Brasil

Vale-operated Vargem Grande mine site is located in the state of Minas Gerais, Brazil and contains 2.53 billion tonnes of proven and probable iron ore reserves, making it the world’s fourth biggest iron ore mining operation. The Vargem Grande site comprises three open-pits: Tamandua, Capitao do Mato and Aboboras.

White FDA-approved Ceramic Lagging – bulk sugar ship-loading conveyor

Sugar Australia operates a specialised food-grade bulk refined sugar vessel, MV “Pioneer”. Elastotec developed a white ceramic lagging made from FDA materials approved by the U.S. Food and Drug Administration (FDA) for handling sugar on a ship-loading conveyor drive pulley.

BlueScope Steel Port Kembla

BlueScope steel was formerly a business within BHP Billiton that became and independent company in 2002. With well known brands such as COLORBOND®, ZINCALUME® and GALVABOND® BlueScope provides engineered building solutions to meet a multitude of end uses.

PT Freeport

Grasberg Mine PT Freeport Indonesia – PROK/Elastotec Hot Vulcanised Ceramic Lagging Case Study. The Grasberg open pit mine is the largest gold mine and the third largest copper mine in the world.

PT Kembla Coal Terminal

In early 2012 Port Kembla Coal Terminal (PKCT) identified a need to refurbish the drive pulleys on their two Stacker Reclaimer units. Included in this refurbishment was replacement of the lagging.

News

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The importance of good metal preparation to good lagging adhesion

Correct pulley shell surface preparation is essential for good lagging adhesion. Grit blast to a 50-100 um surface roughness and check by measuring at multiple points across the pulley face and around the pulley circumference.

EL.IN Approved Applicator

EL.IN. is an engineering company based in Grevena in northern Greece. For many years EL.IN. has been refurbishing pulleys for the Public Power Corporation (PPC) of Greece. PPC operates seven power stations that are fuelled by Lignite and a number of mines that supply the fuel for these mines. The PPC operations have conveyor systems with over 2,000 pulleys in service with a number of different lagging types in service, including rubber, cold vulcanised ceramic and direct bond ceramic.

Martin Sprocket China

Martin Sprocket and Gear (Martin) is an international manufacturer of power transmission, and materials handling equipment including conveyor pulleys and idlers. Martin has 35 plants located throughout the USA, Canada, Mexico, Brazil and China. The company is focused on manufacturing high quality products, maintaining large inventories to ensure superior service to their customers, being contactable 24/7 and providing exceptional field support.