The intermediate silo serves as a central collection point for the extracted material © Scheuch Ligno
After around two years of construction, Mayr-Melnhof Holz’s project of superlatives went into operation in Leoben in 2023. The plant marks a significant step forward in the industrial production of high-quality cross-laminated timber. The planned annual capacity is up to 130,000 m³ at full utilization. The complex consists of three CLT production halls, a post-sorting plant and planing mill for lumber, a high-bay warehouse, and a packaging and loading hall.
Professional consulting and planning
“The project as a whole was the largest investment in the company’s history – and the extraction system was part of this major project,” Markus Thier, head of CLT production at Mayr-Melnhof Holz, explains. “For such a large-scale undertaking, it is crucial to have reliable partners not only during the construction and commissioning phases, but also beyond. We were and are very satisfied with Scheuch Ligno.”
Sound insulation, energy efficiency, and performance reserves
“We had various requirements in this project – including sound insulation, energy efficiency, energy recovery, and performance reserves for future expansions,” Thier emphasizes. “During the planning phase, we jointly came up with effective solutions to the challenges at hand, which were ultimately implemented to our complete satisfaction.”
Larger extraction units with negative pressure control
In a modern CLT factory, extraction accounts for approximately one third of total electricity consumption. Thus, there is a huge potential for savings in this area. To minimize energy consumption, each machine group is assigned a precisely adjusted fan in the Segas Plus extraction system. Thanks to the negative pressure control of the individual extraction units, performance remains constant and within the optimal range throughout the entire lifespan of the filters.
Material transported over 1.3 km
The extracted material from the three CLT production halls is transported via a 450-m-long medium pressure (MP) conveying system to a new intermediate silo at the planing mill. Up to 15 t of material can be moved to cover peak loads. The material from the planing mill is also collected in this intermediate silo and then transported via another 850-m-long MP conveying system to the silo at the pellet mill. Scheuch Ligno emphasizes that this robust and high-performance design of the entire conveying system has proven to be extremely economical, especially with long conveying distances and high material volumes.
