Untaught Experiences Regarding Common Practice and Standards for Sampling, Characterization, Control, and Design of TMP and CTMP Operations, 2016 International Mechanical Pulping (IMPC) Conference  


In this paper we share with you some of the insights we have gained over the years where established standards and common practise may lead to erroneous conclusions. We strongly emphasis to perform well characterized but more limited number of trials instead of many trials less carefully analyzed. When collecting pulp from the blow-line, composite pulp samples taken during three minutes should be used. At least four composite pulp samples should be subsequently collected and included in the analysis.

In the procedure of tensile index measurements, at least 40 strips should be used. In order to reflect the “length” factor of mechanical pulps, we suggest to use the average length-length-weighted fibre length. We recommend to strive for the idea launched long time ago by d’A Clark, Forgacs, and Strand: Use pulp characteristics which are independent and as few as possible. We have found that such characteristics may outperform long time used pulp properties with respect to estimate the paper making potential of the pulp. There are strong indications that it is possible to simplify the process design as compared
to today’s common practise and still be able to produce mechanical pulps of uniform and “good enough” quality in an energy-efficient way.

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Author: Olof Ferritsius, Rita Ferritsius, Jan Hill, Karin Eriksson, Kathrin Mörseburg, & Johanna Ferritsius
Untaught Experiences Regarding Common Practice and Standards
Untaught Experiences Regarding Common Practice and Standards for Sampling, Characterization, Control, and Design of TMP and CTMP Operations, 2016 International Mechanical Pulping Conference
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