ANDRITZ has confirmed that Holmen Board and Paper‘s paper mill in Braviken, Sweden, is now running with maximum production efficiency and flexibility after the OEM successfully completed the rebuild of PM52.
Andritz implemented its concept to allow for flexible production of book paper, newsprint, and containerboard based on thermo-mechanical pulp (TMP) on PM52. The machine has a wire width of 9.3 m and a design and operation speed of 1600 m/min. The rebuild enables Holmen to strengthen its position in the packaging market by increasing both the quality and production capacity of containerboard grades.
Andritz provided engineering, installation and start-up services and supplied key components for the comprehensive rebuild. Central to the project was the conversion of the former using the patented PrimeForm TW shoe blade gap forming technology, which ensures optimal MD/CD ratios, superior formation across paper grades, and maximum dewatering capacity. The pulsation-free engineered impingement shoe and patented variable wrap technology are key contributors to the high flexibility of the new forming section. The new PrimeFlow AT headbox enhances jet quality, fiber dispersion, and orientation. In addition, the press section was rebuilt to increase dryness, save energy and improve the runnability of the machine. The scope of supply also included a clothing package, a spare parts package, extended control systems and an automation package for enhanced efficiency.
“We are satisfied with the Andritz solution, which meets our high requirements and enables us to increase production efficiency and capacity as planned. With the sophisticated new concept, we can now switch seamlessly between different paper grades. The new forming section provides a wide set of optimisation tools, and we are impressed by how forgiving the geometry adjustment is while the machine runs at full speed,” said Peter Dahlén, Technical Director, Holmen Board and Paper.
“This project demonstrates our commitment and ability to provide innovative, high-performance technology and full-service support that help our customers meet the demands of a dynamic market,” said Gerald Steiner, Senior Vice President, Paper and Tissue, Andritz.
