This product comprises a range of self-cleaning pulleys for the dirty sides of conveyor return belts. These are extremely long lasting and capable of removing large volumes of sticky materials from the return strands of conveyor belts, and for which existing types of scrapers and plows are unsatisfactory. They are also strong enough to be used as replacement pulleys in many applications.

The pulleys have relatively low rotational speeds and have been designed to fit directly onto the standard existing return belt supporting structures in belt widths from 750 – 1800mm. Fundamental research on belt scrapers has shown that in view of the surface roughness characteristics of belts and scraper blades, there is a limited level of performance of belt cleaning that may be achieved, also that the fines content of the carry-over on the return side of a conveyor increases after each cleaning device and each idler set with existing scrapers.

Rates of wear and maintenance on belts and existing scrapers have been exacerbated by the increase in conveyor capacities and speeds. If a part or whole scraper becomes dislodged from its fixings, this often causes catastrophic failures in the conveying system and extreme safety hazards.

Cleaner operations features are: -

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More positive mechanisms for both removal and ejection of belt build-up and longer durability than any other cleaner.
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Extremely high cleaning and rejection rates with thick layers of build-up. With sticky iron-ore, these rates are 1.3 kg/pulley revolutions or 4 t/hr at a belt speed of 5 m/s.
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Reduces the volumes and removal cost of multiple piles of material beneath a conveyor to be removed.
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Virtually no moving parts except for infinite life roller bearings.
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No adjustments as required for other cleaners.
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Lowers the potential for production losses from shutdowns for cleaner maintenance and catastrophic damage from cleaner failure or loss of attachment.
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Reduces the magnitudes of build-up, wear and corrosion on return idlers.
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Minimises return belt misalignment and unnecessary spillage
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Minimises the labour intensive, hazardous and costly clean up of fines from beneath the conveyor and behind tail pulleys.

The maintenance and replacement costs for conveyor belts and idlers are a substantial component of all conveying costs as are the production losses and costs for premature wear and failure. There is currently a very large body of research and development around the world, to improve this situation, but with considerable on-costs to industry.

Below is an image of the equipment:

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