Motsie,

Hello! What type of liners do you use? What size and quantity? The problem you are having is called "bridging" and usually occurs with fine powders. In metric ton bulk bags this can be resolved fairly easily however in large containers of 20ft or larger there are special designs to help eliminate this problem. We will be happy to work with you if you will give us more information please.

We manufacture many styles and designs of PE Film Liners and Woven Sewn Liners for exports. We have manufactured bulk bags for 20+ years and also sell small 25kg woven polypro bags.

Awaiting your response,

Andy Mintz

President

CorrPakBPS, LLC

www.corrpakbps.com

318-699-0108

318-699-0501 Fax

318-348-8613 cell ■

Hi,

This is not a liner problem but a chute design problem. You will have to increase the material speed through the transfer to stop this. I have colleagues in South Africa that could help or you can send some basic details to me at colin.benjamin@gcsm.com.au.

Colin Benjamin

Gulf Conveyor Systems P/L ■

Motsie,

A proper response can be provided once the material properties, chute geomtry, belt configuration including idlers, and tonnage details are known.

Maybe the chute needs to be reconfigured, the head pulley position changed, belt speed increased or chute liner changed.

Why have you restricted the fix to a liner change?

If your product is fine ( P80<10 mm and D50< 1mm) and has high moisture (>12% surface), then the need is to minimize side wall contact.

If your product, in general, exceeds these specifications there are special low sliding friction liners which can be of help. Some HWPE and chrome liners can do a good job depending. ■

I add, CDI has granular dynamics software that can provide flow belhavior, liner sensitivities, improvements in chute geometry, proper and improper modifications as demostrated by a physical model. See our website for some examples. ■