Stabilizing of Stock Preparation LC-Refining by Using Valmet Online Analyzer

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  • バルメットオンライン分析計を用いた調成工程LC叩解の最適化
  • バルメットオンライン ブンセキケイ オ モチイタ チョウセイコウテイ LCコウカイ ノ サイテキカ

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Abstract

Paper properties are determined by the fiber properties. Fiber dimensions are changed by refining. The refining result is affected by many factors such as fiber species, process conditions, refining system, refiner geometry, refiner fillings, amount of refining and intensity of refining. Traditionally, refining has been controlled based on freeness （drainage rate） with either manual or feedback control. Freeness is the result of the treatment of the fibers and the same freeness can be achieved with very different fiber properties. Advanced fiber imaging techniques have now provided a better understanding of the freeness quality.<br>Controlling refining by freeness alone may not produce a homogeneous mass on the machine, even if the refiners themselves are at their setpoint. Paper machines can experience unexpected web breaks due to changes in fiber properties even though Freeness （CSF） or Schopper-Riegler are firmly on target.<br>The quality of the freeness must be known in order to optimize the refining to produce a better end product.

Journal

  • JAPAN TAPPI JOURNAL

    JAPAN TAPPI JOURNAL 76 (8), 751-755, 2022

    JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY

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