Transportation & Storage of Ferrous Sulphate

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Posted in: , on 6. Apr. 2004 - 13:25

InBulk Technologies

Subject: Transportation & Storage of Ferrous Sulphate

ISO-VEYOR

THE IDEAL WAY TO TRANSPORT, STORE AND DISCHARGE FERROUS SULPHATE HYDRATE INTO THE CEMENT PRODUCTION PROCESS

In response to new legislation on the acceptable levels of Chromium VI contained in cement, InBulk Technologies is adding scope to its intermodal ISO-Veyor concept. ISO-Veyors are being cited as a safe and economical way to transport, store and discharge Ferrous Sulphate into the cement making process.

EU directive, 2003/53/EC, restricting the marketing and use of cement and cement based preparations, where they contain (when hydrated), more than 0.0002 % (2 ppm) chromium VI of the dry weight of cement, was published in the official journal of the European Union on 17th July 2003. Lengthy studies have taken place in recent years which directly links Chromium VI to a debilitating form of dermatitis.

From the 17th January 2005, compliance with the directive will be mandatory for ALL cement manufacturers, formulators and suppliers who produce or import such products into the EC.

In order to comply with the directive, the European cement industry will be required to invest in new equipment and modify its processes by adding chemical reducing agent – Ferrous Sulphate Hydrate to all its cements (except white cement) whether supplied in Bulk or in Bags to reduce levels of Chromium VI to acceptable levels.

Combinations of Traditional tipping tankers, IBC’s, drums and bulk cargo ships can all be put forward as possible logistics solutions. However there are a number of economic, environmental and safety issues when considering these options. Increasingly tipping tanks are not permitted within cement plants due to inherent H&S issues - with materials becoming stuck and requiring manual intervention to ‘free up’ the blockage. At best this takes time and effort; at worst it could endanger site personnel. The economics of tipping tanks should also be looked at carefully as the additional cost of tipping chassis considerably adds to the overall equation.

‘Big Bag’ solutions have also been muted for these deliveries; however an appreciation for the material would quickly discount this method due to the volatility and corrosive nature of Ferrous Sulphate. “Secondary handling is inevitable with “Big Bags”, opens up the possibility of product contamination, degradation and exposure to moisture”.

Bulk cargo ship is a great method of transporting large volumes from point to point. With supplies of Ferrous Sulphate coming from more than one country and distribution requiring delivery to multiple locations in each country, any cost advantage is soon lost. The volatile nature of the material also discounts ship as the best method.

InBulk Technologies have recently been approached by a number of cement producers to look into this problem.

Explains Bill Thomson, CEO at InBulk Technologies: “This is a new solution to a new problem; ISO-Veyor technology provides the ideal solution for the problem of Ferrous Sulphate and cement producers requiring a continuous stream of this material. In essence, ISO-Veyors offer an unrivalled degree of flexibility, speed, mobility and safety”.

“For example, Ferrous Sulphate, although not a hazardous substance per s, can best be described as difficult to store and handle and should be handled with the usual care of chemicals. There are certain properties that need to be taken into account. Ferrous Sulphate is an irritant and as such, special care needs to be taken when handling. It is damaging to skin, eyes and is also harmful when inhaled. It has a low melting point of 64 degrees Celsius and forms into a corrosive acid when in contact with water. It is also hydroscopic material, absorbing moisture from the environment.

Needless to say, It’s important to limit human contact and equally important to prevent it coming into contact with the environment. ISO-Veyors are ideal for all these reasons”.

The ISO-Veyor is truly intermodal, facilitating easy transition between road and rail. It consists of a cylindrical vessel with a 21m3 or 31m3 capacity constructed within the frame dimensions of a 20 ft or 30 ft ISO unit and can be handled as a standard ISO container, utilising skeletal trailers or intermoadal rail wagons available Europe wide. It can be filled at source and remain sealed until the point of delivery thus removing the need for intermediate handling or storage to consequently eliminate cross contamination and reduce environmental damage.

There are also a number of very sound economic reasons why ISO-Veyors could be utilised.

Continues Thomson: “We estimate as much as 150,000 tpa of Ferrous Sulphate will be required for dosing with cement at plants throughout Europe. The bulk of these ready made supplies will come from a variety of places and combinations in modes of transportation will certainly be involved. This could mean any combination of Road, Ship and Rail”

This really is where ISO-Veyors have a distinct advantage. Since they can be transported and lifted using the existing infrastructure at intermodal railheads and ports, there is no need for investment in expensive handling equipment. The units can be left at a railhead (buffer stock) and collected as and when they are required for onward delivery to the process.

“This flexibility ensures that the customer has a constant supply at their fingertips, where they want it, when they want it and in the right quantities”.

At the end location, ISO-Veyors are able to discharge the material similar to discharging of a standard road tanker. This is achieved whilst in the horizontal position; all that is required is an air supply and discharge pipe. Contents can be conveyed a distance of up to 100m to the final process. Once again, the flexibility of the ISO-Veyor comes into play since it can be placed adjacent to the customer’s process and moved around as and when required.

“This revolutionary intermodal system provides numerous long-term benefits: the opportunity to transport increased amounts of product on rail networks which lead to shorter and fewer road journeys thus relieving road congestion throughout Europe’s overstretched road network and impacting favourably on the environment.

“This is a totally new requirement for large volumes of Ferrous Sulphate to be transported and stored. At the moment, for less volatile compounds such as cement, conventional practice calls for several discharges and filling processes throughout the supply chain - from rail tanker to silo, from silo to road tanker then to back again to silo - which calls for costly, dedicated equipment that can cope with only one mode of transportation.

With the ISO-Veyor, we can offer customers the opportunity to develop and implement greater project flexibility which in turn will enable them to offer their customers a safer and superior quality cement at minimal additional cost.

For more information on InBulk Technologies, please visit:

https://edir.bulk-online.com/profile...chnologies.htm

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