Kvaerner Pulping AB and its subsidiary Kvaerner do Brasil, have signed a contract with Bahia Sul Celulose S/A in Brazil to upgrade the pulp mill’s fibre-line and recausticising plant and through this increase the pulp manufacturing capacity from the existing 578 000 to 645 000 tons/year bleached eucalyptus pulp. The total order is worth more than USD 30 million. The first step of the expansion comprising an upgrade of the oxygen plant – including a COMPACT PRESS(TM) – was awarded in June 2003 and will be installed by the second quarter of 2004. The latest order is for an upgrade of the continuous digester to a modified cooking process, KOBUDOMari, to provide increased yield and better bleachability.
The bleach plant will be upgraded for the higher capacity including a repeat order for another two COMPACT PRESS(TM) and a new DUALD(TM) stage will be installed for saving of chemicals and to provide improved brightness stability of the pulp. A final pressurized peroxide bleaching stage, PREPOX(TM), for environmental friendly bleaching will also be installed. The upgrade of the existing recausticising plant includes a new system for white liquor filtration, including a PDW(TM) filter.
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