20-Nov-2006 - Kemira Oyj

Kemira to deliver pickling acid regeneration plant for Rautaruukki

Kemira Oyj has concluded an agreement with Rautaruukki Oyj on the delivery of a regeneration plant (i.e. recovery plant) for pickling acid used in pickling hot-rolled steel at Rautaruukki's Raahe Mills. "This project is a part of Kemira's growing water chemicals business and the company's first full-scale regeneration plant delivery to customer in the metal industry," says Hannu Luhtala, Vice President, Kemira Kemwater.

The iron-containing hydrochloric acid formed during the process of pickling steel is treated at the regeneration plant. Kemira's task is to remove the iron from the acid, which the company then uses to make water treatment chemicals. The purified hydrochloric acid is then led back into Ruukki's hot-rolled steel strip manufacturing process. The regeneration of the acid is based on Kemira's own technology, which enables close to 100% recycling of the hydrochloric acid used in the pickling process, according to the company. The plant is the first acid regeneration plant built based on this technology and it is an important reference delivery for Kemira.

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