Re: Alumina Handling
You have not sufficiently identified the initial geometry where the belt is lifted , if there are other horizontal and vertical changes in alignment, and the degree of changes. These facts are essential to determine if a belt transport is viable.
I lieu of geometric details, I suggest you visit the Sicon website. They make belt conveyors that may be easily and economically tailored to your needs.
http://www.sicon-roulunds.com/
There are others of similar concept. If this system does the job then others can be explored.
Lawrence Nordell
www.conveyor-dynamics.com ■
Re: Alumina Handling
Replacing the dense phase pneumatic conveying system with a mechanical conveying system is like reverting back to ancient technology. There is no reason why a well-designed and well-operated dense phase should give problems to this extent. Without knowing what kind of problems you are having, it is not possible for me to suggest their solutions. All I can say is that we will try our best to solve your problems. Let us know what these problems are. Please visit our web page on www.powderandbulk.com/pcc. We have extensive experience in conveying of alumina.
Regards,
A. T. Agarwal
Consulting Engineer
Pneumatic Conveying Consultants
www.powderandbulk.com/pcc
polypcc@aol.com
Ph and Fax: 304 346 5125 ■
Re: Alumina Handling
I'M NOT SURE WHAT YOUR PARTICLE SIZE IS, BUT IF THE MATERIAL CAN BE FLUIDIZE THEN A FLUIDIZATION HOSE MAY WORK FOR YOU
Best Regards,
Ronald Collins
President
Pavement Technology,Inc.
9308 Industrial Dr. NE
Covington, Ga. 30014
770-388-0909 phone
770-388-0149 fax
mailto:ronaldc@pavementtechnology.com ■
Re: Alumina Handling
Depending on the particle size, reliable dense phase conveying of alumina for smelters can be troublesome unless the correct design features are employed.
Clyde Materials Handling of extensive experience of dense phase conveying of thousands of materials, alumina being one of these.
Typically we would need to know if the alumina is primary or secondary (has recycled content from the cells), where material is collected from and conveyed to, particle size, bulk density and moisture content.
It is possible to employ dense phase conveying for over 350m. If you send us details of the specific problems you experience and what your requirements are we will be pleased to make recommendations.
regards
Rich Ellis
Clyde Materials Handling
UK ■
The Right Dense Phase System
Don't go to a meachanical system, as Amrit says it is like going back to ancient technology - it might seem attractive now, but once you get it on site you will find a whole range of other problems with spillage, seal wear etc.
Lean phase is no good because alumina is highly erosive so the bends will be in holes every day. Also, the particles are weak agglomerates and lean phase conveying will break them down and give you too much dust - you might know that dust is bad for smelting.
Dense phase is right, but an "ordinary" dense phase system is no good because the material is neither highly air retentive, nor highly air permeable - the fundamental requirements for reliable dense phase transport in a "normal" system.
There is one and only one solution for alumina - the Alesa system with an internal by-pass pipeline. I should say we have no links with Alesa, but we have evaluated their systems for alumina and found them to be extremely good.
If you need further details including some case studies we have done, drop me an email via our web page www.bulksolids.com.
Hope this helps.
Mike. ■
Alumina Handling
Attn: Dr. M. Bradley, Rich Ellis, Ronald Collins
Gentlemen,
I sincerley express my gratitude for sharing your views and advice in connection with the above.
On study of valuable interaction with you, other experts and reputed manufacturers all over the world, we have ultimately decided that dense phase pneumatic system should be the most appropriate system of handling for the particular case I was referring to. The existing system does have some problems and we are trying to resolve the problems in consultation with the manufacturer.
Thanking you once again for sparing your valuable time and offering your assistance,
With regards,
D.S. Mallick ■
Re: Alumina Handling
Dear Sir,
for the conveying your material approx 350 m we recommend you a blowing system. We had a system which work with two vessels.
First the first vesseol will be fill with material. Than after the filling the vessel will blow up with presure. If the max presure is arrive ( approx 3,5 bar the gate at the ground open and the material will blow outside the vessel through pipe. During this time the second vessel will filled up. By this system we convey approx 200 m/h material over 300 m and 30 m up to the silos.
For your small capacity we also can do this with only one vessel or with small vessels.
So you are interest for this system let us know.
Best regards
Bernd Sauer ■
Re: Alumina Handling
Dear Sir, our company is the licencee of Fenner Dunlop for the Enerka Becker System Which is an enclosed belt system made from conventional belting techniques.
For more information you can visit our web site: www.enclosedbulk.com
Best regards
Frans van der Zee
Enclosed Bulk Systems
ps the english version of our web site will be on line soon. ■
Alumina handling
In connection with expansion of our smelter plant, a new alumina handling plant has to be installed. The distance of conveying is around 350 M. The existing alumina handling plant is by dense phase pneumatic handling system. Unfortunately, right from the commissioning, this system has been giving enormous problems and needs regular attention. We, therefore, are looking into the possibility of various alternate systems such as belt conveyor, tube conveyor and dilute phase pneumatic handling system.
The belt conveyor system, though reliable and rugged, has the problem of spill over, causing loss of material and also dust problems. Regarding tube conveyor, our system capacity of 10 TPH appears to be too small. More over, the usage of tube conveyor is new in our country. To the best of my knowledge, there is only one installation where the system has been installed in our country.Also,the cost will be prohibitive. As far as dilute phase, I understand that the high velocity will create product degradation. More over, abrasion rate will be very fast and therefore, not recommended.
With the above, can any one advise me regarding the following:
1)What is a state-of-art alumina handling system? For our specific case, the capacity will be around 10 TPH.
2)Advantages and disadvantages of the other alternatives.
3)For a travel distance of 350 M, whether dense phase is recommended?
4)In our existing system, immediately on receipt of material, the system is making a lift of 20 M and then travel horizontally for about 200 M. Can our problem be attributed to the lift immediately downstream of feed point?
Thanks ■