14 VALMET
INDUSTRY NEWS
Pulp Paper & Logistics
Results from Botany mill: Replacing old machines with new efficient OptiConcept board making line
“Having a single supplier significantly reduces the number of interfaces between service and equipment suppliers,” says Jacob Chretien, general manager of Technical - Paper & Recycling at Orora
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Orora. “Having a single supplier significantly reduces the number of interfaces between service and equipment suppliers,” says Chretien.
Recycled fibre-based production
B9 uses 100 per cent recycled fibre sourced from domestic containerboard and mixed waste. While the distances between Australia’s few and widely- dispersed urban centres would normally place a heavy transport cost burden on collecting
recovered fibre, most of the recycled fibre used at the mill is conveniently drawn from the Sydney area, says Karl Achleitner, general manager of operations. “Transport costs are not a significant issue,” he says. Production manager Tero Ylikoski
points out that recycled fibre can vary widely in terms of quality, and that sourcing mixed waste takes careful management, as well as making trade-offs between raw material cost and runnability. “There is a calculated risk in receiving mixed waste,” Ylikoski
points out, noting the greater likelihood of finding non-fibre material in cheaper supplies.
Recycled fibre line The recycled fibre (OCC) line at the mill has an OptiSlush pulper to break down the recycled material into fibres and remove most impurities. HC Cleaners remove coarse heavy particles, such as staples, stones and glass. The line has OptiScreen coarse screening, fractionation to separate long and short fibres, LF fine screening, and LC cleaners.
The line has a design capacity
of 1,300 oven-dry tonnes per day into the high density towers. Due to exceptionally dirty raw material, the system features a three-unit de-trashing loop for efficient debris removal. The loop system is a world first and enables maximum out- throws removal and high capacity with only one pulper station. Orora is pleased with the
performance of the OCC line. It produces very clean results with “few specks and very low stickie counts,” says Jacob Chretien. It is efficient in energy terms: “energy
January/February 2015
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