Premron - Closed Conveyor System

Premron manufacture the Premron E-BS closed conveyor system. This system provides a cost-effective method of conveying difficult materials in harsh conditions. The Premron E-BS uses a rubber belt that is formed as an enclosed pouch taking the shape of a teardrop when loaded.

Instead of having a single drive, it has multiple low powered controlled drives strategically placed along the belt to be lightweight and flexible. This provides for lightweight support structures with the ability to negotiate 90 degree turns at a small radius.

FLEXIBLE ROUTING CONVEYOR SYSTEM

Advantages of the revolutionary Premron E-BS conveyor system over traditional trough conveying include an ability to turn corners and change direction without a transfer station, as well as being environmentally friendly through it encapsulating the product and maintaining ‘dust free’ transportation. Additionally, the system saves space and offers flexible routing, with the ability to convey material on the return strain.

The system displays low belt tensions and a wide range of mounting options, and a superior security of payload to traditional conveying systems. This system is utilised by a broad range of industries, including:

• Metalliferous mining
• Alumina refining
• Aluminium smelting
• Magnesite refining and smelting
• Cement and lime plants
• Salt harvesting
• Rare earth mining
• Power generation
• Chemical processing
• Waste treatment and recycling
• Food processing
• Wood chip and pulp handling
• Grain and crop handling

THE BELT

The rubber belt consists of a 5mm thick ply with triangle shaped profiles on each end. The belt is produced from one piece of rubber and pressed including the triangles in one pressing like a conventional belt. Because the belt is also fabric reinforced it has limited stretch and is therefore resistant against UV, Ozone and O2 influences and is suitable for outside use. The belt can be supplied in two sizes and three different grades:

Sizes (unfolded width of the belt):

• 800mm
• 1,400mm

Grades:

• RAS: wear resistant
• ROM: oil and grease resistant (food grade)
• BETAHETE: Heat-resistant up to 80°C & peak to 100°C

By applying the multiple drive system, the belt tension is kept very low. There are no steel cables necessary in the system and it can therefore be repaired with conventional vulcanization techniques.

CONVEYOR DRIVES

Premron E-BS conveyor drives are located along the conveyor at locations that limit the belt tensions to one specified. The drives are in sets of two, and arranged opposite one another in order that they apply equal drive pressure to the belt drive wedge.

These drives are in the form of a geared motor, inline with a lagged drive pulley and fitted with an anti-run back device and disc brake fitted to the motor. The personal protection is provided by lanyard switches and guarding as required.

BELT SUPPORT ROLLERS

Premron E-BS belt support rollers are placed at an even distance as required, and comprise a steel bracket with a bolted clamp to a circular hollow section. Rollers can be cantilevered or supported from each end. Each assembly comprises an outer pipe shell and support shaft assembly.

The shaft will be supported on single row deep groove precision ball bearings sized to permit practical shaft diameters while satisfying bearing deflection criteria that allows a B10 bearing life. Bearings will be factory greased and incorporate a labyrinth sealing device.

The Premron E-BS modules are available as follows:

• Head discharge and belt turnover module
• Tail/GTU and feed module
• Drive module - load belt
• Drive module - empty belt
• Intermediate module - straight
• Intermediate module - curved
• Manuals and assembly drawings