Pulp Paper & Logistics


INDUSTRY NEWS 15 VALMET


The new Valmet boardmaking line replaced three older machines at the Botany mill


consumption is as low as was designed,” he says. Also wear is surprisingly low. “Wear-related issues on all components after the full-flow cleaners are much lower than we expected,” says Chretien. “The pulper, fractionation and LF fine screening equipment are all exceptional and perform equal to or better than we expected.”


Wax is an issue for the mill.


“We do struggle on occasion with wax, which is a function of the feedstock and the amount of waxed boxes used in the Australian market,” Chretien explains. Fortunately, this is a much less significant problem than had been expected.


World-class board machine Valmet supplied a complete OptiConcept boardmaking line, from headbox to reel. It also supplied the approach flow system, air systems, press section clothing as well as a high-speed winder and roll handling. B9 has a wire width of 6.25m, a design speed of 1,600 m/min, and an annual capacity of 400,000 tonnes of testliner and corrugating medium. Orora is very pleased with the


performance of the forming section, which features two high- speed OptiFlo headboxes designed to deliver both good formation and strength properties. “The twin gap former design has allowed us


to successfully manufacture high- strength papers very effectively across our wide grade range,” says Chretien. After forming, the web proceeds


to dewatering on the two-nip press section, at nip pressures of 1,200 kN/m and 1,400 kN/m, respectively. The press performance has been trouble- free and efficient, according to


the mill management. “We are routinely achieving dryness of more than 54 per cent exiting the press section, which leads to high output and very low steam consumption,” Chretien explains. The press section “has not missed a beat” since start-up, he adds. A single-tier pre-dryer section


follows the press section and the OptiSizer size press is followed


4


Customer support manager Cathy Parra and production manager Tero Ylikoski


January/February 2015


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