Long belt conveyors
13th January 2021
The longest belt conveyor system in the world is in Western Sahara. It was built in 1972 and is 98 km (61 miles) long, from the phosphate mines of Bu Craa to the coast south of El-Aaiun.
The longest conveyor system in an airport is the Dubai International Airport baggage handling system at 63 km (39 miles).
Boddington Bauxite Mine in Western Australia is officially recognized as having the world's longest single flight conveyor. Single flight means the load is not transferred, it is a single continuous systems for the entire length. This conveyor is a cable belt conveyor system with a 31-kilometre-long (19 mi) conveyor feeding a 20-kilometre-long (12 mi) conveyor. Cable belt conveyors are a variation on the more convention idler belt system. Instead of running on top of idlers, cable belt conveyors are supported by two endless steel cables (steel wire rope) which are in turn supported by idler pulley wheels. This system feeds bauxite through the difficult terrain of the Darling Ranges to the Worsley Alumina refinery.
The second longest single trough belt conveyor is the 26.8-kilometre-long (16.7 mi) Impumelelo conveyor near Secunda, South Africa. The conveyor transports 2,400 t/h (2,600 short tons per hour) of coal from a mine to a refinery that converts the coal to diesel fuel. The third longest trough belt conveyor in the world is the 20-kilometre-long (12 mi) Curragh conveyor near Westfarmers, QLD, Australia. Conveyor Dynamics, Inc. supplied the basic engineering, control system and commissioning.
The longest single-belt international conveyor runs from Meghalaya in India to a cement factory at Chhatak Bangladesh. It is about 17 km (11 miles) long and conveys limestone and shale at 960 t/h (1,060 short tons per hour), from the quarry in India to the cement factory (7 km or 4.3 miles long in India and 10 km or 6.2 miles long in Bangladesh). The conveyor is actuated by three synchronized drive units for a total power of about 1.8 MW supplied by ABB (two drives at the head end in Bangladesh and one drive at the tail end in India). The conveyor belt was manufactured in 300-metre (980-foot) lengths on the Indian side and 300-metre (980-foot) lengths on the Bangladesh side. The idlers, or rollers, of the system are unique in that they are designed to accommodate both horizontal and vertical curves along the terrain. Dedicated vehicles were designed for the maintenance of the conveyor, which is always at a minimum height of 5 metres (16 ft) above the ground to avoid being flooded during monsoon periods.