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Pulp & Paper Industry Reference :  Metsä Board

Unique storage solution for limited space

22.04.2020

Metsä Board’s Husum mill operates in the small village of Husum in Sweden. The mill is an integrated board and pulp mill and it produces 730,000 tons of bleached market pulp every year, as well as 400,000 tons of folding boxboard and 250,000 tons of kraftliner.

Creative engineering required

Metsä Board had shut down two paper machines and replaced them with a new state-of-the-art paperboard machine from Valmet in 2015–2016. One paper machine was converted to produce linerboard. After this, the mill has been producing 500,000 tons of paperboard a year on two production lines. The mill also ceased their fine paper sheet cutting operations and replaced them with a new extrusion coating line. These changes required a new intermediate roll storage (IRS) between the paperboard production lines and the extrusion coating line.

“Because the TransRoll™ system is scalable, it can be fitted into small, low spaces as well as large, high ones.”

The best location for the IRS was the old empty sheeting hall next to the new extruder line. However, this hall was limited by its six-meter ceiling height and by its small footprint. The height limit meant that stacking rolls would not make efficient use of the vertical space, offering only limited storage. In addition, the floor area was not suitable for traditional clamp trucks or automatically guided vehicles (AGVs), because half the floor space would be needed for vehicle access routes.

A scalable solution

After studying the storage hall and its dimensions, Pesmel proposed a solution based on the TransRoll™ automated storage concept. Because this system is scalable it can be fitted into small, low spaces as well as large, high ones. The TransRoll rack was scaled to fit the available height providing two levels of TransRoll channels for rolls with a maximum diameter of 1,8 meters. To make the most efficient use of the floor area asymmetric channel lengths (24 m and 17 m) were selected to be served by a single stacker crane in the aisle between them. This layout optimized the use of vertical and horizontal space providing double the storage volume of an autonomous guided vehicle (AGV) solution. The whole system, including all features of handling and sorting, is controlled by an intelligent Pesmel WMS warehouse management system.

The stacker crane moves rolls to buffer storage between the paperboard lines and the PE coating station.

Despite its compact size this tailored TransRoll automated storage concept successfully fitted 4,500 tonnes of paperboard into a 3,180 m2 space with just a six-meter ceiling height providing a handling capacity of 300 tons of paperboard an hour. Fire safety was also integrated into the system with sprinkler pipes on the racks on each level of the storage. An additional benefit from the choice of the TransRoll solution comes from the stacker crane handling the rolls. This significantly reduces the need for conveyors.

Tailored solutions with smart engineering:

  • Scalability; TransRoll fitted into an only six-meter high space
  • Clever use of space; 4500 tonnes of paperboard stored in 3180 m2
  • Handling capacity of 300 tonnes per hour

Pesmel Oy
P.O. Box 14 (Päntäneentie 3)
61801 Kauhajoki
Tel. +358 20 7009 600
Email: pesmel(at)pesmel.com

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