Valmet to modernise boiler at Stora Enso's Ostrołęka mill

Valmet has won an order from Stora Enso Narew to modernise the circulating fluidised bed boiler at the Ostrołęka pulp and paper mill in Poland, supporting greater use of refuse-derived fuel. The work includes replacing the boiler bottom and adding a new bottom-ash sieving system, to be installed during the mill's June-July 2027 annual shutdown. The order, booked in Valmet's third-quarter 2026 orders received, has an undisclosed value.

Why this mattersHigher refuse-derived fuel use at an integrated containerboard mill points to packaging producers leaning harder on waste-derived energy to cut costs and emissions.

• Valmet will replace the boiler bottom and add a new bottom-ash sieving system at Stora Enso's Ostrołęka CFB boiler
• The scope includes two years of spare parts and commissioning support
• Valmet supplied the original CFB boiler to the mill in 2010
• Installation is scheduled for the mill's annual shutdown in June-July 2027
• The order was booked in Valmet's third-quarter 2026 orders received; its value is undisclosed
• The Ostrołęka mill, part of Stora Enso's Packaging Materials business, makes recycled containerboard and kraft paper

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