Dear Mr Banerjee,

I believe that you will have to consider different speeds of operation in this case or else you would be looking at a virtually unmanageable size of the belt for such an application.

The different throughputs under consideration are -

a) Pellet @ 600 m3/hr

b) Lime @ 400 m3/hr, and

c) Coal @ 1000 m3/hr

Hence, for the same speed (1.2 m/s) you will have to size your belt on Coal. Typically a 400 mm diameter pipe at 1.2 m/s would convey barely 345 TPH (432 m3/hr) coal although it would be capable of carrying the required throughputs of Pellet & Lime.

Prima facie, I would be tempted to suggest a 1400 mm wide belt having pipe diameter of 400 mm designed to carry lime / pellets at your desired speed of 1.2 m/s and coal at a speed of 3.5 m/s.

Alternatively you may consider a 1600 mm wide belt having pipe diameter of 440 mm (one would not know how much overlap is necessary in absence of information regarding the route profile), which would be capable of conveying Pellet & Lime at the desired speed and Coal at a lower speed of around 3 m/s

It is usually preferable to avoid larger pipe diameters which are much more difficult to manage - from the belt manufacturers, system designers AND users points of view. Of course, most belt manufacturers would be loathe to admit this publicly.

I hope this helps.

Regards ■