Bar crossing forces in a TMP refiner

Dustin Olender, Ingunn Omholt, Lauri Salminen, Antti Fredrikson, Mikael Lucander, Peter Wild, Jari Sirviö, Thomas Browne

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific


Local force and temperature were measured in a pilot TMP refiner, with the objective of identifying the magnitude of the mechanical forces acting on the fibres. The average normal peak forces measured over a range of refining conditions were between 0.5 and 8.5 N. This corresponds to normal stresses in the range of 50 to 460 kPa. Increasing the speed of the refiner rotor led to a decrease in the forces in the inner part of the refiner and an increase in the middle section. There was no clear difference between the refining stages at similar specific energy.
Original languageEnglish
Title of host publicationProceedings of International Mechanical Pulping Conference 2011
PublisherChinese Academy of Forestry
ISBN (Print)978-7-5019-8251-6
Publication statusPublished - 2011
MoE publication typeB3 Non-refereed article in conference proceedings
EventInternational Mechanical Pulping Conference, IMPC 2011 - Xi'an, China
Duration: 26 Jun 201129 Jun 2011


ConferenceInternational Mechanical Pulping Conference, IMPC 2011
Abbreviated titleIMPC 2011


  • TMP
  • refiner
  • refining zone
  • rotational speed
  • force sensor
  • force distribution

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