1. ## Conveyor Chute Problem

Small space on chute, 2 options so far...

Good day all, I have another interesting case. We have a chute where the ore is dumped, from one conveyor (upper) to another one (lower). The chute is good in size but hard to modify based on the fact that is already done, there is no budget available (as usual) and the space is reduced to work inside. So far, the problem we have is that when the ore comes down and is loaded onto the lower conveyor, it sort of explodes, causing some ore backing up the conveyor (going backwards) and severe wear to the canoe liners at that point.

Dead beds are installed around the place trying to reduce the speed of the ore coming out of the belt.

1. One idea is to install something similar to a skirt right under the current liners, this way, the ore will be captured in the middle area. The downside of this idea is how to make the skirt fit and also it may be worn in about 1-2 months, resulting in a poor cost/benefit idea.
2. We might also lower the current deadbed and install some rubber bars we have in stock, this idea is the best one we have now because the rubber bars will not be used and we have a lot. However, we are still thinking on more ideas on how to solve the issue.

Here is a drawing with the situations, thanks for your input!

Notes: dead bed ore is brown, liners are gray, rubber is red, and conveyor belt is yellow.

2. No drawing or no file is found.

Rgds,

3. Still not there? I can see the image now...

4. Dear Mr. Minemechaz,

You are referring to transfer of material from one conveyor to another conveyor. One has to analyse the actual flow path of material within the chute. The material to be impacted appropriately at certain points so that it flows down with chosen controlled speed (approximately). Finally, this material should be fed in direction of the belt motion. For this, generally one provides for 1.2 to 1.5 m long chute last leg in-line to belt at 55 degree to 60 degrees inclined to horizontal, so that it has velocity component in direction of belt travel. For high speed conveyors, one should try to keep the outgoing conveyor at the least inclination to horizontal. Most preferred situation is horizontal conveyor at feed zone.

Regards,
Ishwar G Mulani.
Author of Book : Engineering Science and Application Design for Belt Conveyors.
Author of Book : Belt Feeder Design and Hopper Bin Silo
Advisor / Consultant for Bulk Material Handling System & Issues.
Pune, India.
Tel.: 0091 (0)20 25871916

5. Minemechaz

can you post a drawign or a sketch of the chute?

6. Hello mr Mimemechaz,

I donot know the dropheight of the ore and the configuratiion of your impactplate.
I work at EMO bulktransshipment site in Rotterdam and we handle coal and ironore.
The configuratiion of the impactplates in the transferpoints we modified so that the bulk of the tranferred ore falls on the center roller of the bottom conveyor. We modified the side skirting (liner) too and placed no rubber on it but a steel bar of 40 mm x 40 mm and over the full length of the skirting. The steel just grazes the beltsurface. In the transferpoint we use impactrollers and we spaced the sideskirting as wide as posssible, using about 150 mm free beltspace at the edges for beltswing.
The impact plate is made slightly conical with straight sides, with it there is no spreading of material over the complete transferpoint.
If you are interested in more information, please mail me and I can provide sketches or drawings
We have verry little wear at the liners

Regards

Harry
Last edited by polleke; 8th July 2009 at 8:55.

7. ## conveyor chute problem

Dear Mimemechaz,

Please give some important informations as :

- heights
- speeds
- material data (name, specific weight, size, umidity)
- capacities
- arrangement drawings,

then it will be easier to us to evaluate this situation, and eventually help you.

Rgds.

Alexandre Calijorne