22 VALMET
Pulp Paper & Logistics
Kruger has also taken advantage
of Valmet’s knowhow after the initial tune-up period by having one of its experts on-site to help with further optimisation of the machine.
Surpassing industry standards with innovative technology Kruger’s ambitious target is to be among the best linerboard producers in North America and to provide its quality-conscious client base with a strong, stable,
March/April 2019
flat sheet offering the best strength-to-basis-weight ratio. The technical scope of the rebuild was crafted with that in mind. “Kruger did the choice of implementing the latest technology available and had dedicated proper resources to exploit the full potential of that technology,” says Levesque. Patel adds: “We have excellent
sheet formation, and the new dilution headbox means excellent CD profiles. We had some issues with the pick-up. They were
resolved by changing the felt design, and apart from that we’ve had very good experiences with the OptiFormer forming section with shoe-and-blade technology.” He is also happy with the
retrofitted shoe press. “Obviously, it has provided us with more capacity with more dryer sheet, and it has been straightforward to use. The first sleeve exceeded its warranty life, and it was in excellent condition considering the beating it experienced during the start-up,” he continues.
During the start-up, the mill
was forced to push the upper and lower limits of the machine. Patel explains: “It showed to us that the machine has the flexibility and ability to run within wide limits. We were able to go as low as 88 gsm or as high as 171 gsm or more. We do not have to play with the tilt, rod design or all these different elements every time we change grades. It gives us a certain flexibility to make the transition from light to heavy weight without the downtime that comes from
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