Give Siwertell the opportunity to amaze you _______ 54-58

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Say goodbye to crushing, dust, spills, and additional fines inalumina unloadingOur free demonstration at your site will show you what alumina handling should really look like. You’ll wonder why you didn’t invest in a Siwertell unloader years ago.blksales@cargotec.com

youtube.com/siwertell siwertell.com

Give Siwertell the opportunity to amaze you

Few investments can totally trans-form a business at a stroke, but Juha Huovilainen, Sales Director, Siwertell, explains how making the switch to a Siwertell screw-type unloading system can save alumina plant owners and opera-tors a fortune and offer major en-vironmental benefits.

Siwertell screw-type unloaders outperform established, traditional equipment for alumina unloading to such a high degree that opera-tors would save so much, so quick-ly, that their return on investment would be unusually rapid, followed by major cost savings stretching ahead for decades.

If the industry as a whole made the move from traditional grab cranes and pneumatic systems and in-vested in Siwertell unloaders on a

global scale, we estimate it would result in annual savings of up to US$1.0 billion.

You may think this is too good to be true, but Siwertell has supporting data showing conclusively that the global aluminium production in-dustry can profit significantly from making the switch to its totally-en-closed screw-type technology. The advantages and consequent cost savings are delivered in a number of different ways, related to the nature, value and processing re-quirements of alumina. But in all instances, it is the performance of the Siwertell unloader that delivers the results.

Figures explained

Alumina is a valuable commodity. Spillage associated with tradition-al unloading methods costs the industry millions of dollars every year. This is particularly true with

grab cranes. The picture of the grab crane at work clearly demonstrates the scale of the problem.

A Siwertell customer reports that using a grab crane for unloading alumina results in the loss of one and a half percent of the materi-al during the discharging process. In contrast, discharging tests with Siwertell road mobile unloaders showed no loss of bulk material whatsoever.

To present this in monetary terms, we can consider a typical operation with an annual intake of half a mil-lion tonnes of alumina. With alumi-na priced at US$400/tonne, the an-nual value of cargo arriving at the discharge berth is US$200,000,000. Therefore the annual saving result-ing from using a Siwertell unloader is a massive US$3,000,000. On top of this, there is a negligible amount of cleaning necessary when using a Siwertell unloader and working

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conditions are greatly improved.

We estimate that eliminating spill-age right across the industry would result in savings of up to US$600 million per annum.

Pneumatic systems are also widely used for alumina unloading. While they do not incur spillage on the scale of grab cranes, pneumatic un-loaders lose money in other ways. They are less efficient than Siwer-tell unloaders, and consume more power per tonne of alumina un-loaded. Far more importantly, the use of pneumatic systems results in high levels of cargo degradation which has serious consequences for the smelting process.

Putting the lid on smelting costs

Aluminium smelting requires a massive amount of energy and the process is very sensitive to the amount of fines (powdery material)

in the alumina. Siwertell customer Aluminij Mostar reports that, in its experience, alu-mina discharged with a pneumatic unloader has a fines content with a particle size of less than 45µm of up to five percent.

Aluminij Mostar used a Siwertell unloader for discharging alumina for ten years (see separate text box). During that time the alumina had an average fines value of be-tween 0.2 and 0.3 percent. The re-duced amount of fines had a huge positive impact to the energy con-sumption of the plant because the lower the percentage of fines, the less energy required for the smelt-ing process.

A number of smelters have closed because the high cost of energy made their operations uneconom-ic. We estimate that minimising cargo degradation by using our

screw-type unloaders could save the global industry up to US$400 million every year.

Environmental credentials

Siwertell unloaders have unbeat-able environmental performance with zero spillage and virtually no dust creation. Aside from the eco-nomic advantages of receiving 100 percent of the shipped cargo, op-erations as clean as this are vital for those importers with facilities close to centres of population and commerce who are finding it diffi-cult to meet increasingly stringent environmental regulations.

Unloaders to suit operations of any size

For alumina importers with a high throughput, Siwertell can offer suit-able unloaders with rated capacities up to 2,000t/h. These can be fixed installations or they can run on rails.

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Some models can be equipped with rubber tyres to allow self-pro-pelled operations without the need for rails. For smaller scale operations our road-mobile un-loaders offer the perfect solution. Road-mobile units are also ideal for operators discharging alumina at multiple locations.

Interested but still not convinced?

We realise that asking operators to replace their cranes and pneumatic systems before they have reached the end of their useful life is a big ask; certainly not a decision to be taken without being absolutely certain that it will deliver all that is promised. This is why we have

a free, no obligation offer to bring one of our road-mobile unloaders to your import terminal so you can see for yourself exactly how it performs. You can make your own measurements and observations to confirm our claims regarding the cleanliness, the power consump-tion, the rate of discharge, the level of cargo degradation and the minimal clean up requirements. In preparation for such a demonstra-tion we can provide you with de-tailed reports of similar tests car-ried out in Northern Europe.

This is not a gimmick and there is nothing altruistic about it. We are all in business to succeed. We know we can give you a massive

commercial advantage and we want to sell our unloaders to you. We all have much to gain.

Finally, if your company’s tradi-tional alumina unloading system is near the end of its useful life; please think very carefully about your next move. You have the choice between giving your com-pany a massive commercial advan-tage or committing it to decades more of sub-optimal performance. To support our business case we are prepared to give substantial guarantees related both to the performance of the unloader as well as the degradation of the bulk material.

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Well-established in alumina loading

Siwertell loaders have been delivering reliable service for alumina exporters around the world for decades.

Siwertell’s well-known attri-butes of clean, careful han-dling and low power con-sumption are exactly what this market demands. On top of that, operators derive great confidence from the support provided by Siwer-tell’s global service network and our remote monitoring and fault-finding capabilities.

Siwertell loaders are especial-ly well suited to the particular

demands of handling alumi-na, because they make use of aeroslides and Cleveland cas-cade-type vertical telescopic loading spouts that handle the material very gently, re-sulting in minimal cargo deg-radation. Dust collectors are fitted at all transfer points to reduce dust emissions to an absolute minimum, allowing exceptionally clean, high ca-pacity loading.

The highest capacity Siwertell alumina loader delivered to date is a Siwertell HST-1800with a rated capacity of 2,500t/h. It has been operated by Hydro Alunorte in Brazil since 2008.

Say goodbye to crushing,

dust, spills, and additional

fines in alumina

unloadingOur free demonstration at your site will show you

what alumina handling should really look like. You’ll wonder why you didn’t invest in a

Siwertell unloader years ago.blksales@cargotec.com

youtube.com/siwertell siwertell.com

First delivery demonstrates performance capabilities

The first Siwertell unloader to be used for handling alumina was a 5000 S, road-mobile unit delivered to Aluminij Mostar’s import termi-nal in Ploce, Croatia in 1997.

Equipped with a double-loading bellows system and radio remote control, it had a rated unloading capacity of 150t/h, handling ships and barges of up to 5,000 dwt.

A major factor in Aluminij Mostar’s decision to purchase a Siwertell system was its desire for a clean, environmentally-friendly operation.However, the company soon foundthat it had also made a very wisedecision for wider-reaching com-mercial reasons.

Commenting on its unloader in 2001, it said that the machine was operating to its complete satisfac-tion, handling over 100,000 tonnes of alumina per annum, and exceed-ing its specified unloading rate by30 percent. The company described it as: “environmentally superior and very efficient”.

Operations at Ploce ceased in 2006. By that time the unloader had logged 10,550 hours, discharging over 1,250,000 tonnes of alumina, delivering an impressive overallthrough-the-ship rate of nearly 120t/h.

Siwertell gained valuable experi-ence from providing solutions to some early teething troubles re-lating to bearings and their seal-ing and lubrication arrangements. These were quickly resolved to the customer’s satisfaction and from then on operations were virtually trouble-free. The screws experi-enced no significant wear.

Building on this early experience and through subsequent develop-ments and improvements, today’s Siwertell unloaders are perfectly specified for alumina handling.

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