Features Paper Pulp
Valmet to rebuild PM 9 paper machine and stock preparation at Burgo Group’s Verzuolo mill

Valmet will rebuild its original PM 9 paper machine, and it will change over its related stock preparation systems from producing lightweight coated (LWC) paper grades to recycled containerboard grades.

The rebuilt machine, which is scheduled to start production at the end of 2019, will help Burgo Group to diversify its operations. PM 9 will be producing recycled liner and fluting grades at a trim width of 9,800 mm and with a basis weight range of 70-160 g/m2. The annual capacity will be 600,000 tonnes.

“By having all the process equipment, process automation and mill engineering from one supplier, binds it all into a one,” said Jari Vähäpesola, president of paper business line for Valmet. “This assures a very good flow of information, a reliable project schedule, short installation time and an energy-efficient operation. Valmet’s long expertise on grade conversions is essential for this project. It is also a great asset for Burgo, that this paper machine was originally supplied by Valmet in 2001, so we know it well.” 

Valmet’s delivery includes a completely new old corrugated containers (OCC) line and major modifications in the existing paper machine. The OCC line, which is called an OptiRefiber recycled fibre line, contains two bale handling and vertical pulper systems, extensive cleaning and screening systems with fractionation and disc filters for short and long fibre lines. The scope includes also new reject handling system for OCC rejects. Also, the existing broke system and approach flow system are modified. The delivery in the existing paper machine includes a headbox rebuild, modifications to forming section, press section and pre-dryer section, a new after-dryer section with a high humidity hood, modifications to the size press, a continuous cooking system for surface size starch, and relocation of the existing reel.

The delivery also includes related air systems, a large Valmet paper machine clothing package and changes and improvements in the automation including machine control, quality management and process control and condition monitoring systems. The delivery includes mill engineering for both the OCC line and board machine. All the equipment will be delivered with installation and an additional production support package after start-up.