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Lime Silo Damaged at NorFraKalk in Norway, Industrial Area Evacuated

Nordkalk (info a nordkalk.com), 7 September 2014

NorFraKalk 7 September 2014

A silo containing quicklime at NorFraKalk AS in Verdal, Norway, collapsed partly around 10 am on Sunday 7 September. Because of danger of full collapse, the industrial area was evacuated within a 500-meter radius from the site. The cause of the accident is not yet known.

NorFraKalk is a joint venture owned in half by Nordkalk Corporation and Norwegian Franzefoss Minerals AS. It produces quicklime, calcium oxide, mostly for the needs of paper industry.

The damaged silo is one of NorFraKalk's three silos standing next to each other. All are built in 2007 when the lime kiln was started up. The storage capacity of each silo is 5000 tons. The damaged silo was full, and on Sunday afternoon the rescue workers and NorFraKalk's personnel were evaluating ways to empty it.

The partial collapse did not cause any damage to people, and no lime dust was released in the incident. Calcium oxide may cause irritation of respiratory tract. It can also cause serious damage to eyes and irritation of skin. Contact with water causes an exothermic reaction, forming slaked lime, calcium hydroxide, and strong heat is released in this reaction.

Because of the above, storage and handling of quicklime are strictly regulated and instructed. Nordkalk will inspect all of its silos immediately. Only one silo, located at KPAB on Gotland, has a similar construction with those in Norway.

The kiln at NorFraKalk must be temporarily shut down because of the accident. Nordkalk's Supply Chain organisation has started the procedures to ensure planned lime deliveries to customers.

Further  information
Jarkko Kaplin, Division Director, PulpPaper & Finland, Nordkalk Corporation
Tel +358 20 753 7107

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Nordkalk is the leading limestone company in Northern Europe. We deliver essential raw materials to numerous industries, and our solutions contribute to clean air and water as well as productivity of agricultural land.