Andritz to supply a pressurised refining system for production of sustainable insulation to Switzerland

Andritz 1CP single-disc refiner for superior fibre quality at reduced energy consumption (Image: Andritz)

International technology group Andritz has received an order from Lignatherm to supply a pressurized refining system for a new insulation board production plant in Küssnacht am Rigi, Switzerland.

According to Andritz, this greenfield plant will use exclusively wood chips from local forests to produce eco-friendly insulation board.

Tobias Osterwalder, Bereichsleiter Weiterverarbeitung, Lignatherm, said: “We are looking forward to offering insulation based entirely on natural building materials that bind CO2. This will significantly enhance our product range. Having an experienced partner like Andritz on our side is crucial to making this important project a success.”

The new line, with a capacity of 10 bone dry metric tonnes per hour, will comprise a pressurised refining system with a 44-1C(P) single-disc refiner and a pressurised digester with counter flow and steam regulation including a C-feeder at its core.

A 14in ANDRITZ plug screw feeder will ensure optimal dewatering, leading to improved fibre quality at reduced electrical and thermal energy consumption.

Andritz will also be responsible for supervision of erection, commissioning, and start-up. The new production line is scheduled to commence operations in Q3 2025.

With a track record of supplying 16 fibre preparation systems for insulation material production, this order further strengthens Andritz’s position as a leading supplier to the global insulation board industry.

Lignatherm is a subsidiary of Schilliger Holz, a company operating sawmills and wood processing plants at three locations in Switzerland and France. The company’s products primarily serve the construction and packaging industry in Switzerland, France, and Italy.