Dear Mr. AntoR,

The design of such conveyor is a lengthy affair and it is not practical to describe the procedure in detail.

I understand you are referring to apron conveyor which is one of the type of chain conveyor used for conveying. You have to go by following steps :

1) First decide the conveying speed.

2) Decide the design conveying rate in mtph and then convert it into m3/hr.

3) Divide this m3/hr by conveying speed and it will give you the required flow cross section of the material by apron conveyor.

4) If the apron conveyor length is large, material can be conveyed as freely resting on apron pan. In this case calculate the flow cross section and thereby the apron size. If the apron conveyor length is short, one can opt for material resting against skirt plates. In this case, for the flow cross section consider its height as appropriate percentage of its width, say 70% etc. This will give enable you to calculate the flow cross section width and height.

5) On knowing this flow cross section area, fix the size of apron pan.

6) Then you have to make preliminary assumptions about apron weight, chain weight etc. Using this data, find out the conveying resistance, material & skirt plate rubbing resistance, lift resistance, terminal resistance etc.

7) The resistance as above will enable you to decide the kW, tractive pull on tight side, tractive pull on return side, chain size, sprocket size, shaft size, gear box ratio etc.

I wish the above the information may be of some use. It is advisable that you should try to obtain some leaflet etc. from the different type of apron conveyor in market and it will help you to proceed as above.

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.

Email : parimul@pn2.vsnl.net.in

Tel.: 0091 (0)20 25882916 ■

At assignment level this is not beyond your capabilities.

The apron feeder is like a small conveyor belt. I have used a Conveyor Design Manual to check on the drive power required - just adapt the coefficients to suit your application. It wasn't the most academic of solutions, but it gave me a second opinion on what the Contractor was offering me.

The suprising thing is that, because of the very slow speed of the pans, the power requirement is extremenly low (500 W or something like that). The issue becomes more being able to develop the torque needed to pull the pans out.

See CEMA Manual.

C.M. Ramos "Design of Apron Feeders" Bulk Solids Handling Vo 7 No 6 1987 ■

do the simple thing and find your local crushing and screening

supply house and give them all your information and they will sell you the right size apron feeder. ■

' pagi,

I suspect that you will not find a local supplier in Jl Marlioboro so you should take the other replies on board.

Additionally you can download the Renolds manual/chain conveyor designers guide which almost builds these things for you. It might be spelled Reynolds, they've been around for years.

Falk do a similar manual but I can't say if it is up for download.

One thing they might not tell you is that the friction between the burden & skirts must be less than the friction between the burden & pan surface. Refer also to Designer's reply to a thread about Hydraulic Radius & you'll get the idea from both ends. ■