Optimum strategies for pulp fractions refining
-
Patrick Huber
,
Bruno Carré
Abstract
Separate refining of pulp fractions before remixing has sometimes been compared to whole pulp refining, with no definitive answer about the interest of doing so. In this work, we present a general method to help decide whether fractions refining can be profitable or not. Recommendations for fractions refining strategies are given, depending on the evolution of pulp properties as a function of applied energy. In the tested case (bleach kraft pulp mix (75 % eucalyptus/25 % radiata pine) fractionated on a 2-stage hydrocyclone process), optimised fractions refining provided a gain of about 40 kWh/T compared to whole pulp mix refining, when targeting a tensile index of 50 N.m/g.
Funding statement: This work was supported by CTP and CTPi members.
Acknowledgments
Frédérique Entressangle, Pascal de Luca, Adrien Soranzo are thanked for experimental work.
Conflict of interest: The authors do not have any conflicts of interest to declare.
References
a Campo, F. (2015) Fractionation and Separate Refining of the Fractions – Does it Pay? In: PTS Faserstoffsymposium. Dresden, Germany.Suche in Google Scholar
Asikainen, S. (2013) Reinforcing ability of fractionated softwood kraft pulp fibres. Nord. Pulp Pap. Res. J. 28(2):290–296.10.3183/npprj-2013-28-02-p290-296Suche in Google Scholar
Asikainen, S., Fuhrmann, A., Robertsen, F. (2010) Birch pulp fractions for fine paper and board. Nord. Pulp Pap. Res. J. 25(3):269–276.10.3183/npprj-2010-25-03-p269-276Suche in Google Scholar
Baker, C.F. (2005) Advances in the practicalities of refining. In: Scientific and Technical Advances in Refining and Mechanical Pulping, 8th Pira International Refining Conference. Pira International, Barcelona, Spain.Suche in Google Scholar
Carré, B., Kumar, S., Fabry, B., Julien Saint Amand, F., Huber, P. (2012) Procédé de fabrication d’un support fibreux multicouche par fractionnement et stratification. Patent application n°1258498, France.Suche in Google Scholar
Chauhan, A., Kumari, A., Ghosh, U.K., (2013) Blending impact of softwood pulp with hardwood pulp on different paper properties. Tappsa J. 2:16–20.Suche in Google Scholar
El-Sharkawy, K., Koskenhely, K., Paulapuro, H., (2008a) Tailoring softwood kraft pulp properties by fractionation and refining. Tappi J. 7(11):15–22.10.32964/TJ7.11.15Suche in Google Scholar
El-Sharkawy, K., Koskenhely, K., Paulapuro, H., (2008b) The fractionation and refining of eucalyptus kraft pulps. Nord. Pulp Pap. Res. J. 23(2):172–180.10.3183/npprj-2008-23-02-p172-180Suche in Google Scholar
Eymin-Petot-Tourtollet, G. (2000) Morfi: A New Tool For Pulp Morphology Analysis. In: Pira International Conference Scientific & Technological Advances in the Measurement & Control of Papermaking Optimising, Productivity and Paper Quality through On-line and Off-line Control. Edinburgh, UK.Suche in Google Scholar
Franzén, R.G. (1982) Energy efficient TMP systems. In: Proceedings of the TAPPI Pulping conference. pp. 137–145.Suche in Google Scholar
Gooding, R., Olson, J., Roberts, N. (2004) Parameters for assessing fiber fractionation and their application to screen rotor effects. Tappi J. 3(3).Suche in Google Scholar
Julien Saint Amand, F., Perrin, B. (2003) Characterization and Simulation of Fibre Separation in Screen and Cleaners. In: International Mechanical Pulping Conference. pp. 245–257.Suche in Google Scholar
Koskenhely, K., Ämmälä, A., Jokinen, H., Paulapuro, H. (2005a) Refining characteristics of softwood fibre fractions. In: 13th Fundamental Research Symposium, 11th–16th September. pp. 427–456.10.15376/frc.2005.1.427Suche in Google Scholar
Koskenhely, K., Paulapuro, H., Ämmälä, A., Jokinen, H. (2005b) Effect of refining intensity on pressure screen fractionated softwood kraft. Nord. Pulp Pap. Res. J. 20(2):169–175.10.3183/npprj-2005-20-02-p169-175Suche in Google Scholar
Kumar, S. (2012) Deinking pulp fractionation: characterization and separation of fines by screening. Ph.D. thesis, Grenoble INP.Suche in Google Scholar
Kumar, S., Saint Amand, F.J., Passas, R., Fabry, B., Carre, B. (2015) Fractionation by micro-hole pressure screening and hydrocyclone applied to deinking line rationalization and future manufacturing concept. Tappi J. 14(4):268–280.10.32964/TJ14.4.268Suche in Google Scholar
Lecourt, M., Meyer, V., Sigoillot, J.-C., Petit-Conil, M. (2010) Energy reduction of refining by cellulases. Holzforschung 64(4):441–446.10.1515/hf.2010.066Suche in Google Scholar
Milichovsky, M. (1990) A new concept of chemistry refining processes. Tappi J. 73(10):221–232.Suche in Google Scholar
Mohlin, U.B. (2002) Industrial refining of unbleached kraft pulps – The effect of pH and refining intensity. STFI AB, Stockholm, Sweden.Suche in Google Scholar
Moller, K., Ruvo, A.D., Norman, B., Felsvang, K. (1979) Screening, cleaning and fractionation with an atomiser. Pap. Tech. Ind. 20(3):110–114.Suche in Google Scholar
Musselmann, W. (1983) Technical review: basics, variables of wastepaper fractionation. Pulp Pap. Can. 57(8):125.Suche in Google Scholar
Petit-Conil, M., Laurent, A., (2003) Bleaching behaviour of softwood TMP, PGW or CTMP fibre fractions. In: Int. Mech. Pulp. Conf.. Quebec, Canada, June. 2–5.Suche in Google Scholar
Qazi, S.J.S., Mohamad, M., Olson, J.A., Martinez, D.M. (2015) Multistage fiber fractionation of softwood chemical pulp through smooth-hole screen cylinders and its effects on paper properties. Tappi J. 14(4):259–267.10.32964/TJ14.4.259Suche in Google Scholar
Suhr, M., Klein, G., Kourti, I., Gonzalo, M.R., Santonja, G.G., Roudier, S., Sancho, L.D. Best Available Techniques (Bat) Reference Document for the Production of Pulp, Paper and Board. European Commission, Luxemburg, 2015.Suche in Google Scholar
Vomhoff, H., Grundström, K.J. (2003) Fractionation of a bleached softwood pulp and separate refining of the earlywood- and latewood-enriched fractions. Int. Papwirtsch. (2):3.Suche in Google Scholar
Supplemental Material
The online version of this article offers supplementary material (https://doi.org/10.1515/npprj-2018-3012).
Full analytical expressions of relevant quantities (
© 2018 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Publisher’s note
- Now at De Gruyter: Nordic Pulp & Paper Research Journal
- Editorial
- News from Nordic Pulp & Paper Research Journal
- Chemical pulping
- Optimum strategies for pulp fractions refining
- Deinking
- Deinkability of different secondary fibers by enzymes
- Mechanical pulping
- Investigation of low consistency reject refining of mechanical pulp for energy savings
- Control strategies for refiners Part I: Soft sensors for CD-refiner control
- Control strategies for refiners Part II: Consistency control in twin-disc refining zones using temperature profile information
- Indications of the onset of fiber cutting in low consistency refining using a refiner force sensor: The effect of pulp furnish
- TMP properties and refining conditions in a CD82 chip refiner. Part I: Step changes of process variables, description of the tests
- TMP properties and refiner conditions in a CD82 chip refiner at different operation points. Part II: Comparison of the five tests
- Paper chemistry
- Parameters influencing hydrophobization of paper by surface sizing
- Effect of pigment sizing on printability and coating structure of decorative base paper
- Strengthening effect of polyelectrolyte multilayers on highly filled paper
- Paper physics
- The effect of the through-thickness moisture content gradient on the moisture accelerated creep of paperboard: Hygro-viscoelastic modeling approach
- Paper technology
- Online quality evaluation of tissue paper structure on new generation tissue machines
- Strong paper from spruce CTMP – Part II: Effect of pressing at nip press temperatures above the lignin softening temperature
- Printing
- Impact of non-uniform water absorption on water-interference print mottle in offset printing
Artikel in diesem Heft
- Frontmatter
- Publisher’s note
- Now at De Gruyter: Nordic Pulp & Paper Research Journal
- Editorial
- News from Nordic Pulp & Paper Research Journal
- Chemical pulping
- Optimum strategies for pulp fractions refining
- Deinking
- Deinkability of different secondary fibers by enzymes
- Mechanical pulping
- Investigation of low consistency reject refining of mechanical pulp for energy savings
- Control strategies for refiners Part I: Soft sensors for CD-refiner control
- Control strategies for refiners Part II: Consistency control in twin-disc refining zones using temperature profile information
- Indications of the onset of fiber cutting in low consistency refining using a refiner force sensor: The effect of pulp furnish
- TMP properties and refining conditions in a CD82 chip refiner. Part I: Step changes of process variables, description of the tests
- TMP properties and refiner conditions in a CD82 chip refiner at different operation points. Part II: Comparison of the five tests
- Paper chemistry
- Parameters influencing hydrophobization of paper by surface sizing
- Effect of pigment sizing on printability and coating structure of decorative base paper
- Strengthening effect of polyelectrolyte multilayers on highly filled paper
- Paper physics
- The effect of the through-thickness moisture content gradient on the moisture accelerated creep of paperboard: Hygro-viscoelastic modeling approach
- Paper technology
- Online quality evaluation of tissue paper structure on new generation tissue machines
- Strong paper from spruce CTMP – Part II: Effect of pressing at nip press temperatures above the lignin softening temperature
- Printing
- Impact of non-uniform water absorption on water-interference print mottle in offset printing
