Flexowall Wear & Fix
Dear Babu,
Please comment on which part of the rubber top surface you may be refering to:
1. belt cover
2. longitudinal flexowall corregated rib side wall
3. cross rib vertical wall
4. combination of 1,2, or 3
Often the loading method can damage the cross rib. Also the chute design can introduce gouging and abrasive damage that can be mitigated by a better chute geometry. This can be determined by reviewing the chute design.
We can offer such a review free-of-charge. If we determine, that by using DEM procedures, this to be the damage mechanism, then you chose whether to have it fixed or not. DEM will quantify the nature and magnitude of damage.
Belt suppliers often use our DEM analysis to improve their belt life warranty. ■
Re: Flexowell Belt
Have you done'cold vulcanising' many times before? This is a tricky process with unpredictable performance requiring careful choice of repair resins.
Belt damages at non-cold repaired portion can occur due to a number of reasons requiring lot of preventive measures and constant surveillance. As for wear out, please check with the supplier of the belt about the composition of top layer compound.
This has to be agreed between the supplier and user depending on the material conveyed. You may specify the requirement atleast for the new belt you will be ordering. ■
Re: Flexowell Belt
It is the Top cover only.
Regards,
TMB ■
Re: Flexowell Belt
Dear Mr Lawrence,
It is Top Cover only. Please help us in analysis.
Regards,
Dear Mr. Gopal,
We have not done any cold vulcanising on the belt except for fixing the top cover on one side 2.0 m long by 300 mm wide at three places.
Regards,
TMB ■
Re: Flexowell Belt
Dear Babu,
Is it possible that the chute design is creating the premature belt cover failure? Can we see the chute design and product details such as:
1. Lump size and percent
2. Rock properties
3. Type of material and possibility of sharp edges
4. Drop distance in chute
5. Rock velocity at discharge into chute
Can we see the type of damage such as gouging or abrasion on cover surface?
What have you considered in a failure analysis?
Photos of product and belt damage?
I ask many questions and you answer very few. Are you really seeking help?
I have commented in publications and in the forum on premature belt cover damage. First, we need evidence. Maybe then a hypothesis can be established and solution found.
There are many reasons that rubber can fail for which I may not have the answer, but, others might have such experience and recommendations. You need to tell more in order for someone to help. ■
Re: Flexowell Belt
Dear Mr. Lawernce,
I shall send you the details shortly. Thank you for your kind advice.
Regards,
TMB ■
Re: Flexowell Belt
Mohan
In 1994 my company made repares to a Flexwall belt. This bslt was instaled on a Cone System. It is a ship unloading system running vertical aproximitly 100 meters. A ship arrived with frozen coal and the belt elevated peices of coal 2 feet in diameter. The belt was a steel cord with 12 inch side walls and 10 inch cup cleats. Some of the cleats were torn of and easily replaced. The damage to the sidewall were constant all around the belt. Cuts up to 12 inches could be found all around the belt. The labor and matarial to change both sides of the side walls was not fisable. The company placed an order for a new belt. Dilivery was 10 to 12 weeks.
We proceeded by using Rema Tip Top matarial. The cracks of the side wall were repaired by the inside with peices of RP200. A pencil grinder was used to prepare the surface, two coats of SC2000 was apllied on both the patch and the belt. The patch was stiched on. The size of the patch is importent. The sidewall had to stay flexible in order to make it around the pulley
The paches lasted 12 months and they were able to operate the belt normaly.
To splice a steal cord belt, I sugest 10 feet. For example a 60 ich ply belt would need 90 inches, time and a half.
If you are fare from your manufacture, I sugest ordering an extra 25 feet and keep it in a good storage aria. You would have in stock 50 feet of sidewall, cleats and a peice of 25 feet of Flexwell belt that is not the same of regular belt
Jean-Marc Boudreau
Canglide Inc ■
Re: Flexowell Belt
Dear Mr.Lawrence,
Iam sending an Attached file separately to you thru e-mail containing the photos. Iam unable to understand the meaning of Rock properties and Rock velocity at discharge into chute. Please explain the above terminology.
Regards,
TMB
Material & Size(mm) bulkdensity(MT/M3) reposeangle(degrees)
ironorelump10-50 ,2.00-2.10, 30-35
Pellets 6-20 ,2.15-2.20 ,28
Ironorefines 0-6 ,2.05-2.1, 30-35
Limestone 10-50 ,1.48-1.50, 30-35
Dolomite 10-50 ,1.49-1.50 ,30-35
Coke 30-90 ,0.60-0.62, 30-35
Coal 10-60 ,0.89-0.92 ,30-35
Belt speed Coal flexowell-2.1m/s Ore flexowell 1.68m/s
Drop distance in chute may be Approx. 1.5mtrs through grizzly bar. ■
Re: Flexowell Belt
With respect Babu..
Isn't 7 years actually quite a reasonable life for a pocket belt operating in such an application?
Regards
LSL Tekpro ■
Re: Flexowell Belt
Mohan,
use a Super-screw lacing to get it some more time in work
http://www.mlt-eu.com/multiside/lief...hp?sprache=USA
Norbert ■
Re: Flexowell Belt
Norbert..
I think he is looking for belt cover repair method, as his top cover is worn out.
Regards
LSL Tekpro ■
Re: Flexowell Belt
Hi Graham
you may be right, I just thought that to prolonge the belt till the new one comes means they started to have some cut in the carcass, and you can use a Super-screw for hole repair, rip repair, in any bias : not only for splices, and its leakproof.
Renewing such a kind of belt will not be easy with the sidewalls and cleats.
Have a nice day
Norbert ■
Graham Is Right Again.
Mr Babu,
7 years for a Flexowell si an excellent performance.
Ok it's expensive and sensitive, but 7 years ...
You won't get a warranty for that long.
Otherwise let me know.
Kind Regards
JP ■
Flexowell belt
We have 594 m 1200 mm wide flexowell belt. It has given life of only 7 years and we found that the top rubber has worn out. Also it has got a side cut due to some foreign particle 3 months back. This was just vulcanised. We have cold vulcanised some top rubber layer on the worn out parts.
The new belt for replacement is in the process of procurement.
If the endless length is 594 m, how much should I ask the manufacturer to keep for pulling and splicing purpose? Also please give me the life of flexowell belts.
This particular belt is used for handling iron ore to top of the Corex unit.
As the time is short and already belt is under threat of breakdown, an early reply will be appreciated.
Please give me an idea of prolonging this belt till the new one comes.
Regards,
TMB ■