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Technical Papers

Spare Pulleys – Hot Vulcanised vs Cold Bonded Lagging

Spare pulleys are held so that in the event that an operational pulley requires replacement this can be done quickly and efficiently at the timing dictated by the mine maintenance personnel. The reason for changing a pulley broadly falls into two categories. • Change out during a planned maintenance shut • Emergency change out due to catastrophic pulley failure

Consequences of catastrophic failure with cold bonded lagging for new mining projects

Catastrophic lagging failure due to debonding occurred within two weeks of installation and operation of the pulley, resulting in a shutdown of production, and necessitated a replacement of the pulley. Within only two weeks of service, this ceramic lagging was already experiencing loss of the ceramic tiles.

Ceramic Lagging Tile Loss – Causes and Prevention

Ceramic lagging is chosen for pulleys where a long trouble free service life is required to ensure that the conveyor is operational when required and to avoid unplanned conveyor shutdowns. This is a critical for mining companies where conveyor down time costs run into thousands of dollars per minute.

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.

Bonding Adhesion

Spare pulleys are held so that in the event that an operational pulley requires replacement this can be done quickly and efficiently at the timing dictated by the mine maintenance personnel. The reason for changing a pulley broadly falls into two categories. • Change out during a planned maintenance shut • Emergency change out due to catastrophic pulley failure

News

Elastotec expands lagging operations

Our dedicated teams in Australia and Vietnam working really hard to understand lagging performance, and to engineer solutions that provide the longest possible lagging service life under all conditions.

New Approved Applicator

Early in 2019 Kledkaew Inter Products Co, Ltd. a rubber lining company based in Bangkok Thailand were approached by a representative from a major power station, with a request for a pulley lagging that would significantly extend the lagging service life beyond the 12 months that was typically being achieved with the rubber lagging currently in use.

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.
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