When thinking about conveying bulk material, a number of options are available to you, the most commonly used are:
- Belt conveyor
- Pneumatic conveyor
- Aero mechanical conveyor
So why choose screw conveying over those solutions?
First of all lets start with a quick definition of what a screw conveyor is : a device for moving loose materials, consisting of a shaft with a broad, helically wound blade rotating in a tube or trough. It is also often referred as an auger conveyor or an helical conveyor.
The definition and images on Wikipedia can also be of help to get a better idea of the possible applications for such devices. It can also be called a worm conveyor in some cases.
There are a number of advantages for screw conveyors :
- The possibility to handle from dry solids to semi fluid materials
- The cost effectiveness of the solution
- The possibility to have multiple inlets, outlets and discharge points in the conveyor
- The possibility to build an enclosed conveyor for corrosive or hazardous requirements
- Possibility to handle sticky and sluggish bulk material without the risk of material building up around the screw's shaft
- The efficiency is higher due to the fact that the conveyor can work with a filling rate of up to 100%
- Because the shaftless screw conveyors do not need hangers and bearings, layout is much easier, therefore saving space and money