What are these sticky materials?

What is the lump size spectrum?

What is the temperature?

What is the hourly throughput & load size?

What are the little protrusions?

What is the present tipping angle?

Would the weight of polished, or curved, or both, inserts be less then the weight of the carryback?

There is a trend towards curved body cross sections to promote flow & save material & bodyweight. A polished surface must also be free from protrusions. Asphalt is loaded over a sprinkling of grit & this works without fail. ■

Notso

Try

http://www.duratray.com/

http://www.alloysteel.net/english/te...carryback.asp ■

Can you try PTFE liners? Take care if you need to handle hot materials or to do any hot works?

Rgds, ■

Originally Posted by ziggy

Notso

Whatnotso?■

Originally Posted by Notso25

I notice discussion about screening bentonite type material and figured people with knowledge in screening may have useful ideas for me to trial.

We have sticky materials getting stuck in truck bodies causing "carry back" which is inefficient. Various rough solutions have been tried in the industry over the years including loose bars on chains suspended from the sides of the truck. On tipping they come off the wall and the load releases out of the truck tray. This is not elegant and has issues with bits going through the conveyors and crushers. Other ideas are to paint the truck with a paint which will release, the problem here is abrasion resistance and how long it will last. It seems that any little protrusion also provides a resistance to the material sliding out of the truck. Having a polished surface which will come about from a high Chrome alloy steel is also one thought, Curved surfaces rather than acute angles is another.

So over to you, all ideas appreciated as from a silly suggestion may come the seed of a brilliant elegant solution.

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It is not a silly question at all

You should read my white paper in regard to empty haul back modes and what it costs the coal strip mines in Indonesia, Colombia and the Powder River Basin coal mines

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What you want is what is referred to as poly liner material;

It used to line dump bodies used to haul sugar beets, sludge, potatoes, wet sand, any sticky material such as ditching dirt that refuses to conform to the laws of simple physics problems.

It comes in large rolls, numerous widths and several thicknesses the poly liner is cut to length and fit to the job and bolted into place.

The agriculture newspaper Ag Weekly published here in the states has several adverts from retailers selling it in rolls and cut to any size up to 5/8 thickness..

Send me your e-mail and I will send their address/phone/ fax/e-mail etc. to you if you would like it and I will get back to you the same day.

lzaharis@lightlink.com ■

I did some work a few years ago on a system which detected 'carry back' in train wagons using photo imagery. When the carry back was identified (which was anything from 1 per 100 wagons, or 30 per 100 wagons in the wet sesson) a robotic arm went into the wagon and water blasted the material, and then the wagon was retipped. Scanned again to make sure it was removed.

All the carry back was in the corners, so the imagery justhad to identify the corner and the robot arm sprayed to a pre-programed routine.

We firstly looked at using high pressure air, but the dust was to high.

www.dbaglobal.net ■

Valley Rubber in Alabama manufacture a inflatable rubber liner system that has been adapted to dump truck bodies.

I personally have not seen them work but I have seen photos of the truck body, one side with the inflatable liner and the other side without. It appears as though they really do work.

Contact Bob Cooper comoinc@msn.com he will be able to help

Good Luck ■