Material Trajectory 1

[StaticFish]

Hi

I'm looking for a little bit of help on how to mathematically determine the trajectory of material off a conveyor belt. Here are the specs (I'm not sure what information would be required)

This particular belt carries a heavy grainy particle (Nickel Matte to be exact) that is about 10.5% water by weight. It runs at 10fpm, and hits the head pulley at an 8 degree incline. The diameter of the head pulley is 24", the width of the belt is 30". The height of the material is roughly 3" to 4".

SF

~~Bold are the ones who come over the line to fall~~

 

[Heyner]

Hi!

I don't know much about it but I remember some explanation about that in CEMA code. (Did you see it?)

Basically, it is a cinematics case, like a parabolic route.

If you think I can help you more, please tell me.

 

[CanuckMiner]

You can check out the following link. About the third paper on the list is entitled "Predicting the discharge trajectory from Belt Conveyors".

http://www.ckit.co.za/Conveyor/Papers/Papers_whole.htm

Cheers,
CanuckMiner

 

[PeterCharles]

I think you may have a bit of a problem here.
10 ft/min is actually very slow for getting a 'trajectory' from the head pulley. The CEMA method is really not suited in this instance.
What will happen is that the material will start travelling round the wrap of the head pulley, then at some point slide off when the friction between the material and belt is insufficient to hold it any longer.
It friction between the belt and material, and the internal friction of the material itself that controls where slippage starts and so this controls the trajectory, the further round the pulley it goes, the less forward velocity it has.
It's going to be a bit trial and error I fear.

 

[StaticFish]

Thanks for your help everyone. I decided a little while ago not to deal with the trajectory of the material, because there is no real trajectory Instead, I analyzed a similar conveyor to get an idea of what the flow looks like.
~~Bold are the ones who come over the line to fall~~