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MEI Online: Commodities: Metallic Ores: Aluminium: Latest News: April 5th 2006


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:: Outokumpu Technology Commissioned two Large Alumina Calciners in a Record Time in Brazil

Outokumpu Technology has, together with Alunorte, successfully commissioned two large calciners and an hydrate filtration plant as part of the Alunorte alumina refinery expansion project in Brazil. This project has the target of boosting the alumina refinery capacity from 2.5 to 4.4 million tons per year of smelter grade alumina.

Alunorte now has five Outokumpu Circulating Fluidized Bed alumina calciners in operation.

Outokumpu Technology's scope for the project included engineering, supply and erection of two Circulating Fluidized Bed calciners each with an output of 3300 tons alumina per day and an hydrate filtration plant consisting of three pan filters of nearly 9 m diameter. Outokumpu Technology in Germany delivered the basic and detailed engineering as well as special equipment and supervisory services. A task force supported by Outokumpu Tecnologia Brazil sourced the remaining process equipment and machinery locally. The contract was executed on a lump sum turnkey basis.

The two calciners and three hydrate filters were hot-commissioned in parallel in February 2006. The first calciner reached its full capacity in less than two weeks. The second calciner was prepared for hot commissioning during this time and, after start-up, it reached its full capacity within only three days, a record time for large alumina calciners. A key factor for this successful project was the outstanding cooperation between Alunorte's well-trained and motivated personnel and Outokumpu Technology.

Outokumpu Technology's proven alumina calcining technology was developed by Lurgi in the 1960s and has undergone continuous improvement since that time. The new Alunorte calciners represent the latest technology with new improvements. This project demonstrates Outokumpu Technology's technological leadership in alumina calcining and further supports its global leading position.




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