Define significant increase in chute height. I assume we are talking translational velocity. ■

The problem is solvable using DEM. Chute geometry and particle physical properties and internal friction details are needed.

Most engineers are not in the business of doing work for no pay. Will you pay for the required work? ■

Some simple physics tells me that any decrease in the energy needed to accelerate the ore by increasing the transfer chute height will be counteracted almost exactly by the increase in energy needed to elevate the material to the new transfer height.

It is simple interchange of potential and kinetic energy.

Belt wear may be a different issue, but there is not enough information to say. ■

The chute height may not need to be increased to achieve 6 m/s exit velocity onto receiving conveyor with 3 m/s entry velocity from discharge conveyor.

You have to understand translational velocity, chute geometry, surface friction with associated pressures, particle properties, moisture and flow mechanics. ■

>>The chute height may not need to be increased to achieve 6 m/s exit velocity onto receiving conveyor with 3 m/s entry velocity from discharge conveyor.

Good point Larry.

Design alone may be enough. That would save some money.

I am making the tacit assumption that this is a new design under consideration, but there is little information in the original post.

If it is the case that this will be an additional flow of 250 tph onto an existing and constant burden of 1750 tph, then I think that some mis-match of velocities will not be an issue worth spending money on. ■

Yes Peter, also true. ■

Gents, it is great to hear all the technology and knowledge in this discussion, However 1 point I feel that will require mention is the fact of material crush upon impact to the receiving belt , not to mention the boiling of product and dust generation associated with the above.

Not wanting to encroach ■

Mr. Gibbsy,

DEM does resolve all your noted points including:

1. belt wear pattern and magnitude

2. turbulence magnitude and location

3. dust liberation by particle size

4. particle impact forces by magnitude and location

5. particle shear pattern with magnitude and location

6. side thrust of product to classify misalignment by location along belt axis

7. visualization of the above with graphs ■

That's Great Lawrence.

But as you have mentioned before $$ allow work.

I am heavily involved in Conveyors etc and would be keen to know more of your info.

Yet I can supply the $$ if the info is top class.

E-mail me to commence talks if you like. My industry conveys Bauxite (wet)

thanking you

Jason ■

"Know"ledge is known. I think you are refering to ideas.

I have promised to post a number of chutes that give an idea. I need wait for the keeper of the chute files to return from vacations.

In the mean time visit our website. ■

I wonder if your mine (C) is the same where company (B) hired an Australia designer (CB) to provide curved hood and spoon chutes that plugged?

Then company (B) hired company (CDI) to correct the chute geometry to eliminate the pluggage about 3-4 years ago.

I recall the chute ceramic liner was a wear issue. This was not in our scope. I do believe we told company (B) that the ceramic liner formulation needed to be changed. After that I dunno. ■

No Lawrence, we are a refinery with about 52 conveyors, doing 3 million tonne per year.

Look forward to your information and or contact.

Thanking you

Jason ■