Metso Starts Up First AshLeach Duo at South American Pulp Mill

Metso's new AshLeach Duo system features a two-stage centrifuge system for removal of chlorine and potassium from recovery boiler ash.

April 8, 2013 - Metso said that it has started up the first AshLeach Duo at a pulp mill in South America.

According to Metso, the AshLeach Duo provides efficient removal of non process elements without the need for steam or sulfuric acid. The new system maintains all operational flexibility advantages of the AshLeach technology, which was originally developed by Metso.

The new AshLeach Duo system features a two-stage centrifuge system for removal of chlorine and potassium from recovery boiler ash, designed to minimize sodium losses and to avoid acid usage at high carbonate levels in the ash, Metso said.

Having effective chlorine and potassium removal is essential for the recovery boiler operations in order to both increase availability and minimize risk for corrosion, Metso added.

Metso also announced that two other global pulp corporations have ordered AshLeach Duo systems to be started up within this year.

SOURCE: Metso