12 VALMET
Knowledge is behind better stock preparation
High-definition imaging at a mill in Finland is enabling operators to better understand fibre properties during stock preparation. Text and images by Nigel Farrand
Fibre Furnish Analyser from Valmet and that has helped the BillerudKorsnäs board mill in Finland to improve its stock preparation. The mill at Pietarsaari produces
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world-leading kraft and sack paper intended for users with very high demands for strength, durability, flexibility, food grade purity and printability. The mill also produces advanced and high- performance paper grades for a variety of technical applications, such as abrasive papers, and reel
etter knowledge of raw material fibre properties is possible with the use of a
“Our device was one of the first
installations with an ultra-high definition camera for online fibre analysis,” says Matti Myllylä, production superintendent at Pietarsaari. “It was the start of a very good cooperation project that continues today, almost a year since the analyser start-up. The support from Valmet, both on-site and using the analyser’s remote connection capability, has been really good, making it a relatively smooth experience.”
and ream wrapping. With a total of more than 150
production grades, extensive knowledge of raw material fibre
properties is essential to meet the high quality that customers have come to expect and rely on for subsequent converting operations.
Fibre imaging technology The new Valmet Fibre Furnish Analyser (Valmet MAP Q) analyser incorporates new fibre imaging technology, which provides micro-scale details, from fibre dimensional properties to shives and their size categories. Monitoring incoming pulp quality and subsequent fibre development provides the opportunity for better control of stock preparation. Further improvement can be achieved with a built-in modelling tool that can continuously predict pulp proper ties from a combination of the analyser’s measurements. As well as measuring a wide
“The Valmet MAP Q includes a really good software client-and-user interface which provides me with essential information at my desk – especially valuable when running trials or troubleshooting. We can immediately see the effect of process changes on the fibre, without waiting for laboratory tests or samples from the reel,” says production superintendent Matti Myllylä (right), pictured with production development engineer Jyrki Härkönen
January/February 2021
range of fibre and shive properties, the device characterises irregular particles, including vessel segments, flocs and other particles. An additional measuring module for standardised freeness, both Canadian Standard Freeness (CSF) and Shopper-Riegler (SR), plus a chemistry module to monitor pH, conductivity and
Pulp Paper & Logistics
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