- Often used to replace bucket elevators as no moving parts, chains etc.. are involved.
- Cooling/Drying application.
- Vertical elevation of bulk materials like iron oxide, sand.
- Drying of granular plastic.
- Cooling of plastic granules and powders.(water/air media.)
- For transporting and re-cooling cofee powder.
- Cooling of aluminium-oxide from 600 degree C to 80 degree C.
- Transporting of Polyamid-granules under protective gas.
- Conveying coal to height of 5 metres.
Among the most versatile forms of conveyors are the Helical Conveyors. They consist of an upright tube around which winds a conveying-path, the cross-section of which can be rectangular or round. They are made of Mild Steel or Stainless Steel. According to the spiral-like arrangement of the conveying path, a long effective distance is acheived. They are driven by electromagnetic or unbalance motors which are mounted in diametrical positions and at a certain angle either at the bottom or at the top of the tube. They produce torsional vibrations. By Micro-projectile movements on the whole conveying path, the product is induced to make its way steadily upwards. According to capacities required, the helical conveyors can be built upto a height of 6 metres. They can be equipped with double conveying paths, so that it will be possible to trnsport two different products at the same time. Depending on the bulk material delivery flows upto 20 M3/h can be acheived.
They are not only used to elevate bulk materials, but are also ideal for process applications such as cooling, heating, and drying.
The helical conveyors can be used for cooling purposes. At regular distances the upright-tube is provided with air holes through which air is fed to the product moving upwards. An axial-ventilator which is arranged on the top of the tube produces the cooling air. Air capacity and air speed depends on the size of the helical conveyor.
Cooling can be done indirectly with water as they are preferable by many chemical industries for cooling down plastic granules and powder because there helical conveyors operate independantly of the ambient temperature.
The helical conveyors can be used in Chemical Industries where material flow rate is small, lenght of conveying stretch is more, charging space is less and the system may be requiped to be gas-light.