Dear Sherif,

I think that U need to have a consultant involved to help U look at the options.

The question of silos falls into several categories:

Shipment size., frequency

Mill capacity

Cement products.

Site limits eg max height of silo, foundations etc.

We have 30,000T silo...inverted cone type....larger silos are more economical than several but it depends if U have more than one product.

Large silos will cost less than AUD 10M - depends on the inloading and outloading equipment.

Thanks

James ■

Dear Sherif,

Again, it depends on what your overall plants requirements are:

Our 20,000T silo is 300m from the mill and we discharge to:

2 trucks at 200tph each,

shiploader - 2km away via belt at 1000tph - exports to our 30,000T silo which then discharges to rail, trucks and bagging plant

bagging plant at 200tph.

We can do this all at once.

U will have a lot of trucks going from your silo to the shiploader...why do it this way? I presume that ships will be taking at least 10,000T as a minimum load.

U really need to do a study of all the options with the market analysis, Capital and running costs, risks, benefits, flexibility for changes etc etc.

Thanks

James ■

Dear Sharif,

As a concept, may I suggest:

locate the silo at the wharf of v close to it.

load the ship from the silo with either pneumatic conveying - pumps, flex hoses etc or mechanical eg air slides, bucket elevators etc.

feed the silo with either - trucks from a silo closer to the mill ie need 2 silos > this will reduce your peak truck demand as u could fill the ship loading silo 24/7 and during shiploading ( silo capacity may not even need to be as much as shipment load) or feed by other eams eg belt conveyor/bucket elevator or pneumatci means (will be expensive to run).

The other alternative is to do what we have is silo close to mill and belt conveyor to shiploader.

U should consider your options and have flexibility eg if markets change, U will need to as well. Perhaps the Mina may have existing conveying equipment which could be adapted to suit your needs.

Cheers

James ■

Dear Sherif,

We make our own clinker on site, do not import.

I presume that the shiploader is existing and so is the mill.

Hence, if U wnat to truck it to the shiplaoder..U can still have one silo - 30,000T - with 2 truck loading bays under the silo and have airslides coming out and feeding 2 external truck loading bays. The silo height will need to be such to provide the required truck clearances.

U may need more than 5 trucks to do the job required.

I do not know if U will use weighbridges under each loading bay - U will need some sort of weighing to stop the truck loading operation.

What is the shioploading operation - do U blow from the truck straight into the ship??

Cheers

James ■

Dear Sherif,

With a 30,000T silo, U should be able to have 3 loading bays under the silo..this will give U 5 in total.

U could have the option of using a belt conveyor to the wharf or pneumatic conveying (will be expesnive to run and will need a fair bit of dust collection).

It sounds like your shiploader is a mobile wharf type with hopper of sorts.

U need to be sure of your options /costs in the study as the installation of a large silo will not be cheap.

Best of luck with it.

James ■

dear sir

pirs company is french company specialisez in dome storage buildings and we have built more than 100 domes all over the world since 30 years ago.

The dome is very adapted to store cement, fly ash, alumina and other dry bulk product.

the dome untill today remain the best and more economical solution to store all dry bulk product specially in port site.

please visit our website www.domepirs.com

please let me have your physical address as i could be able to send you our brochures and reference list.

best regards

PIRS

Z I saint hermentaire

309 avenue de l'europe

83300 Draguignan

tel: 00 33 4 98 10 67 67

fax: 00 33 4 98 10 67 68

e-mailirs@domepirs.com

website: www.domepirs.com ■

IT HAS BEEN A VERY INFORMATIVE DISCUSSIONS AMONG ALL THE GENTLEMEN.

THIS IS WHAT WE WANT TO SAY WHICH WE HAVE LEARNED FROM THIS FORUM AND FOR WORKING IN INDIA WITH WORLD'S RENOWNED PEOPLE IN SILO TECHNOLOGY M/S I- BAU HAM BURG . WHILE WORKING FOR VARIOUS COMPANIES IN INDIA WE HAVE DESIGNED SYSTEM FOR SILO FEEDING AND EXTRACTION SYSTEM,PACKING AND LOADING FOR SILO CAPACITY RANGES FROM 5000 T TO 25000 TONNES OF VARIOUS DESIGNS LIKE-

FLAT BOTTOM,CONICAL,MULTICOMPARMENT,CONCENTRIC SILO WITH 5 COMPARTMENT ETC. FOR MORE THEN 20 CEMENT COMPANY'S IN INDIA.

NOW PLEASE WET OUR PROPOSAL--

1.MAKE A 30000 T SILO NEAR THE GRINDING UNIT.

2.FEED TE SILO BY ELEVATOR IF YOU WANT TO SAVE THE POWER OTHRWISE YOU CAN FEED PNUEMATTCALLY.

3.SILO DIMENSIONS CAN BE 28 M DIA,INVERTED CONE,HT. CAN BE 5O METER WITH 10-12 NOS. EXTRACTION OPEN FLUIDSLIDE INSIDE THE SILO.

4.EXTRACT THE CEMENT FROM THESE FLUIDSLIDES ONE BY ONE AND THEN FEED IT TO BUCKET ELEVATOR OUTSIDE THE SILO MAY BE 25 METER HIGH.

5. NOW FROM THIS ELEVATOER FEED THE CEMENT IN TO CONVENTINAL CONVEYOR OR PIPE CONVEYOR OR FROM THIS ELEVATOR FEED THE CEMENT TO ANOTHER STEEL SILO WHICH HAVE GOT 4-5 BULK LOADING HEADS FOR FEEDING TO THE BULK TANKER/CARRIERS.

6. IF THEIR IS A POSIBILITY OF PIPE ONVEYOR THEN YOU CAN ALSO USE THE PIPE CONVEYOR FOR IMPORTING THE CLINKER,GYPSUM,FLY ASH,SLAG ETC OR YOU CAN GIVE THAT FACILITY ON HIRE ALSO TO SOME OTHER PARTY.

WHAT WE CAN DO FOR YOU-SINCE EVERBODY KNOWS INDIA'S CABABILITY IN THE FIELD OF ENGINEERING THAT IS WHY THE TOP COPMANY'S LIKE BECHTEL,FLUOR ,SIEMENS,GE,UHDE USING OUR SERVISES.-

1.TO DESIGN THE SYSTEM/FEASIBILITY STUDY.

2.TO GIVE THE PRICE OF ALL THE EQUIPMENT INCLUDING IN SIDE THE SILO EXCEPT CIVIL PORTION.

3.TO DEVELOP THE VENDORS FROM INDIA AND OUT SIDE.

REGARDS, ANIL ■

I have just recently read the good exchange of information in this forum and am impressed with the high level of the contents.

A question was asked a few posts ago if more than one truck can be loaded from a silo at the same time.

The simple answer is yes. The withdrawl system can be dessigned to be at a rate sufficient to load multiple trucks using air gravity conveyors to distribute the material to the multiple truck loading points.

The beauty of air activated conveyors is that they can be designed for a very high rate but can easily operate at lower rates if fewer trucks are being loaded. ■

dear Jack Hilbert PE, THANKS FOR BOOSTING OUR MORALE.ALL APPRECIATION GOES TO MR.WOHLBIER AND HIS STAFF.

REGARDS, ANIL SETH

LIBRANSETH ■

Dear Sherif,

I attached a document to this post. As they say a picture is worth a thousand words. It is an easy way to quickly load and unload your trucks with a drive through dome. It also saves you money as you don't have to purchase all the additional reclaim on the exterior of your storage. I had to zip the file as the forum does not allow pdf. Hope this helps.

The versatility of Dome Storage is demonstrated in the different shapes of the dome and the different reclaim methods that can be used to meet your bulk storage requirements. Whether it is a tall Dome-Silo, a Low Profile flat storage Dome, a hemisphere shaped Dome, or any shape in between, Dome Technology can adapt the structure to fit your needs. Concrete domes are very flexible in both the filling and the reclaim of the stored material. Because of the Domes inherent strength, it can support an in loading conveyor system on top of it. Without internal supports this allows the material to fill the dome through one or more openings in the top of the Dome. The material is then reclaimed using Mechanical Screws, Fluidized Floor, Gravity Reclaim or a Front End Loader.

Dome Technology also has an innovative system to build the tunnels used in the reclaiming or bulk materials handling process allowing the tunnel to be built safely in a rapid and economical manner.

Please visit us at http://www.dometech.com for more info on Dome Technology and the solutions we can provide.

Attachments

dome technology - drive thru dome (ZIP)

■

Dome Technology JN,

gentlemen, we have gone throgh your systems and drawings

in http://www.dometech.com site.since we are system designer for silo feeding and extraction system for various material we have following points in our mind---

1.in dwg no. 2004 0708-1,2,you are having very less area for live recovery ,the area of building for loading line 1 and 2 is being waisted inside the silo,this building could have been taken out side of silo and the silo capacity could have been increased.providing space /area for train and for truck loading,please think of vibrations and loadings on the foundation which is already bearing the load of silo.

2.at the bottom of silo you have shown open fluidised system (gravity conveyors) which are meeting in the centre and connected with the in let of air lift pump--the silo slope could have been one side only, to feed the material to air lift system which is out side of building.

3. please let me know if, we will provide bucket elevator instead of air lift the power consumption will definately will less.

4. no doubt , the concept of dome technology is definately latest and best,the need is to provide the competitive feeding and extration system and arrangement for other facilities like bulk truck and wagon loading/unloading.

regards,anil seth

regards, anil seth ■

AnilSeth

AnilSeth said "the concept of dome technology is definately latest and best"

Thanks for the complements kind sir. The principles of Dome Technology are the inventors of the Monolithic dome. Our company has lead out from the begining and we are always looking for way to improve the product and give customers the designs and solutions they need to be more effiecient.

To address your points:

First this is just one specification for one customer that was simplified for general use. It is not a one design fits all. The types of reclaim can be changed to fit the different products that need to be stored and needs of the customer. All of these thing depend on product, speed requirements, environmental issues and so forth. We design each dome/dome-silo to the customers needs and buget.

To address the wasted space issue. The actual loss of volume due to the drive through (although losted space is mininmal - please see the attached document in my previous post) it is easily addressed by building a slightly bigger storage with a faction of the money saved on reclaim equipement. We all know the cost of the external truck/railcar reclaim equipment is very expensive to buy and maintain. Therefore, you can get more space, have less equipment cost, and complete your project for less money.

Another added benefit to the drive through dome is that it is inclosed and if you are concerned at all with the environmental issues you don't have as many dust and blow out concerns. This is great for companies that work in residental areas or ports. It makes them more friendly neighbors.

The vibration issue has been addressed as the tunnel is not affixed to the the dome wall. The tunnel has it's own foundational support. Our tunnels are state of the art, very durible, and quick for us to build.

Anil Seth I have read many of your posts on this site and we have learned a lot from you. No doubt we are not done tweaking and improving the drive through dome. Your comments are greatly appreciated and we welcome more from you and anyone else. ■

dear norman, thanks for your replies.

regards, anil seth ■