Your idlers/rollers support the belt, or not? If you need more support, you need more idlers.

Then consider a 'picking belt' configuration: using very heavy duty centre rollers.

As always it seems your process engineers have left you holding the baby. Get them to guarantee the moisture content of the cake...not chance in hell. so you can use a 'picking belt' configuration and if you get a mud slide blame it on lack of information from process. ■

If the downstream conveyor is so much narrower and the bomb doors open so fast it might be worth considering a scraper chain.

Load support certainly would not be an issue. A ridiculous 2m pulley at 0.4ms^-1 would also disappear. The conveyor will be flat and sealed. If your cake is not highly corrosive why not try a chain? ■

Hello,

Inform the size of the material that will be falling on the belt feeder, and weight of the largest piece that will hit the belt. Also what is the fall height you are considering in the layout. The feasibility of belt feeder is influenced by the material data. Also, whether you are feeding material simultaneously along the entire length of feed zone or its location is changing in succession in the feed zone length. The information as above will help the respondents to give their opinion.

Ishwar G. Mulani

Author of Book: ‘Engineering Science And Application Design For Belt Conveyors’. Conveyor design basis ISO (thereby book is helpful to design conveyors as per national standards of most of the countries across world). New print Nov., 2012.

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

Email: conveyor.ishwar.mulani@gmail.com

Website: www.conveyor.ishwarmulani.com ■

I had already guessed that this was a filter cake disposal situation. The opener mentions 'a'. Is this still the case or are there more filters?

If there is only one filter then a chain is quite adequate to shift 44t in the 10 minute cycle. Then the bomb door opening time of 48s is quite irrelevant.

Everyone assumes a belt is the answer but if you have a single filter a chain conveyor, more correctly a moving bed bunker, will do the job. If you have a whole bank of filters then you need to concentrate on the discharge sequence and the possible failures.

The belt supplier is clearly pulling your leg by saying that 44t every 48 seconds really equates to 3300th^-1 and ignoring the 10 minute cycle time.

I can design your system for the usual modest fee. ■

Hello,

You have filter press, below which there is a conveyor (or belt feeder as you say). Is the filter press ‘dropping’ filter cake or loose bulk material onto underneath conveyor? Or material from filter press goes into interim small storage and then whether the belt feeder is drawing out the material from the same.

Equipment underneath filter can only be said as belt feeder if it is drawing out (pulling out) material from a storage hopper below filter.

In your case it seems probably you have slow speed conveyor. Just because it is slow speed and is having full length skirt board does not mean it is belt feeder.

The requirement about belt and power are quite different for conveyor and belt feeder.

If the filter press is dropping cake on the conveyor, then weight of each cake, and also clarity whether it will be acting as clod and disintegrate into pieces on impact.

I had tackled such application, wherein filter press was squeezing out water, and as a consequence of this process, some mineral turns into cake (actually circular disc. Naming it cake is odd), which disintegrate into pieces on hitting the belt.

Adequate description / information will help the readers to opine in this matter. Belt carcass rating is dependent on the impact energy, idler pitch, traditional consideration, etc.

Ishwar G. Mulani

Author of Book: ‘Engineering Science And Application Design For Belt Conveyors’. Conveyor design basis ISO (thereby book is helpful to design conveyors as per national standards of most of the countries across world). New print Nov., 2012.

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

Email: conveyor.ishwar.mulani@gmail.com

Website: www.conveyor.ishwarmulani.com ■

Originally Posted by prashantd

Moisture Content is 17-19% and the material is iron ore filter cakes. Its dropping cakes at the rate of 44 tons per 48 seconds. Then 10 mins gap. and cycle repeats.

I need skirt width of 2.2 meters leaving only 100 mm belt edge on both sides. Right now, I have considered 165.1 mm dia 3 equal length rollers with 40 dia deep groove ball bearings at a spacing of 400 mm (3 equal rollers to to reduce the load on bearings of centre roller.) Am I on the right path here? Or should I go for picking type Idlers with rubber lagging on the centre rollers?

As far as the Belt & Pulleys are concerned, we are going for a lower belt rating to reduce the drive pulley to 1 meter dia. Suggestions by belt manufacturer's appear too conservative.

These feeders are feeding to 1.6 m wide conveyors at right angle.

Please read my earlier reply suggesting picking belt arrangements. ■