Twin Boom Stacker
Dear Ross,
I think a Twin Boom Stacker would be cheaper as the mechanicals are simpler. We have supplied similar machines to TATA STEEL and can do so for your plant.
Regards,
Mr. Shibaji Dasgupta
Consulting Engineer
Shibaji, Consulting for Ports ■
Re: Dual Boom Versus Slewing Stacker
Why not contact MVT Germany, FLS etc for their views.
Dual boom would be fixed boom and not luffing. Need divertor gate at top. This means drop from end of conveyor could lead to dust generations. Also, if need blendign via chevron, my not get blending effect at end cones.
Slewing luffing boom is OK - suggest that it will be cheaper than dual boom. U have a counteweight that slews around - so tripper car and yard belt has to be placed/designed to allow swing by/thru.
Slewing boom make spoon type feed chute harder to do....so get higher belt wear from feed point.
Always watch travel speed and boom belt width acc......these are prone to high wear, short life and misttracking due to diff. material trajectorys with change in travel direction etc.
Ta
James ■
Bauxite; Ship Loading From Storage
Greetings from USA.
The answer depends on a couple of important points.
First, are we dealing with mine run, crushed or ground bauxite? What are the physical properties ( bulk density and angle of repose).
What is to total volume you need to transfer to the ship?
What is the extra storage you need in the bunker for safety.
Water table and ground conditions are maniditory, and vary between our project sites. There are no "on the shelf" best systems.
Assuming mine run or crushed material, the most cost effective storage is a dome with one or so tunnels, no internal mechanical devices, just belt conveyors out of the tunnel. Typical storage would be 10k to 150k mTons live. These can be MUCH larger than stacker/reclaimer volumes.
The disadvantage is that unless you can put the tunnels under the grade at a significant depth, you will have a static volume. This can be "dozed" into use, used as spare volume, or simply ignored, depending on customer inventory costs.
Circular Stacker / reclaimers, by many suppliers are well suited to stack against the concrete dome, at a height of generally 1/3 the storage apex height. We have built these with similar volumes as above, BUT they take up 1/3 more area (footprint) and have the mechanical equipment cost.
their advantage is that the material can be substantially removed AND can be pre-blended in the storage.
Finely ground bauxite is best stored with pneumatic bottomed domes, and generally these have multiple pneumatic stacking locations. Several good supplier of this pneumatic technology are available.
The dome system volumes agian are up to 100,000 or so metic tons.
The dome system will likely be the least project cost in the storage volume ranges above.
We perform conceptual studies to assist folks, as each of these mechanical variables require different structural systems.
Hope this helps.
Tom Hedrick ■
Re: Dual Boom Versus Slewing Stacker
Ross
Terry Hall from Elecon Australia here.
According to our design dept the twin boom stacker will be less expensive for chevron stacking.
Regards
Terry ■
Re: Dual Boom Versus Slewing Stacker
Dear Mr. Ross Beneke,
The main difference will arise in the intricacy of engineering necessary for both the types. Twin boom stacker with only luffing movement, will have a simpler design engineering issues. The single boom slewing and luffing stacker will demand complicated engineering issues. In case of twin boom stacker, functionally one will be able to make only chevron type of stock piling. As for the slewing and luffing stacker, one has option to make stockpile either of chevron type or windrow type etc. Functionally thus it is a superior arrangement as a functional output.
Regarding the price difference due to mechanical and structural items, there would be marginal difference, mostly in favour or twin boom stacker.
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 ■
Dual Boom Vs Slewing Stacker
Dear Mr. Ross,
No question of comparision. It is all depends on application. If it is Chevron stacking to be used only & lump size is resistricted to -10mm, yes, twin boom stacker is cheaper. But if the lump size is more than plus 10 mm, then you have to go for Windrow stacking for which Slewing stacker is a must.
Regards.
A.Banerjee ■
Re: Dual Boom Versus Slewing Stacker
Dear Sirs,
Luffing arrangement for a stacker is absolutely necessary from environmental point of view. If a dual boom stacker can not have luffing arrangement technically, it is better to drop the idea of going for it even if it is cheaper.
There are ample examples for stacker with both, luffing and slewing facilities operating at much higher capacity handling duster materials. If we can not eliminate gust generation while handling bulk materials, let us minimize it!
Best Regards,
S.Chandra ■
Re: Dual Boom Versus Slewing Stacker
Dear Mr. Ross,
In my earlier reply, I have provided certain information. Regarding exact position about the prices, the best option is to refer to the manufacturers of such machines and get their budgetary price or quotation.
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.
Pune, India.
Tel.: 0091 (0)20 25871916 ■
Duel Boom Vs Slewing Stacker
Dear Mr. S. Chandra,
Twin boom stacker is always provided with luffing arrangement. It is always cheap than slewing stacker but the application is in question.
Regards.
A.Banerjee ■
Dual boom versus slewing stacker
G'day,
■
I'm working on a feasibility study and investigating two options for a stacker application. The material is Bauxite at 1750t/h. ALL ELSE BEING EQUAL, what would be the less expensive option. A dual boom luffing stacker to stack chevron stockpiles, or a slewing / luffing stacker. I don't have any concrete further information as this is still in being worked out.
I would think it would come down to cost difference between the slewing bearing, drives etc and counter weight, versus the cost of a divertor chute and extra boom and conveyor.
I look forward to the replies as I'm sure there will be a variety of conflicting opinions.
Thanks for you input.