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![]() These works are licensed under a Creative Commons Attribution 4.0 International License. T.A. Koroleva, L.A. Milovidova, A.A. Dryakhlitsyn Complete text of the article:Download article (pdf, 0.5MB )UDС676.16.022.32AbstractThe article presents the results of the development of a technological mode for obtaining bisulfite hardwood pulp of high yield on a magnesium base for the production of various types of containerboard. The reliable and effective chemical and heat recovery technology implemented in the bisulfite method allows to use it in independent sulfite process. The effect of the duration of stay at the final temperature on the pulp yield and kappa number was studied when developing the technological mode of cooking. It was found that the increase in the duration of stay at the final temperature of 160 °C more than 40 min leads to violations of the selectivity of the cooking process. Increasing the duration of stay at the final temperature up to 70 min is accompanied by a decrease in pulp yield by 6 % at a constant value of the kappa number of the semi-finished product. Technological cooking mode: hydromodule 5, SO2 consumption 15.0 %, cooking solution pH 4.3–4.5, impregnation time at 120 °C – 35 min, cooking duration at 160 °C – 40 min. The mode allows to get a semi-finished product with a high yield of 60–65 % with a kappa number of 58–60 units without a hot grinding stage. An assessment of the mechanical strength characteristics of the laboratory samples of bisulfite pulp was carried out in accordance with the standards of the Russian Federation. The obtained values of bursting strength, resistance to flat compression, breaking strength, and breaking stress were comparable with the values of the industrial sample of hardwood neutral sulfite semi-chemical pulp with a semi-finished product yield of 75–78 %. It is shown hat the presence of bark in the technological chips in the amount of 7.5 % is accompanied by a decrease in the yield of bisulfite hardwood pulp by 4.5 % and mechanical strength by 7.8 %.AuthorsTatiana A. Koroleva1,2, Candidate of Engineering, Assoc. Prof.; ResearcherID: ABB-5651-2020, ORCID: https://orcid.org/0000-0002-9477-5864Lyubov A. Milovidova1, Candidate of Engineering, Leading Engineer of Research Planning and Support Department; ResearcherID: AAH-5551-2021, ORCID: https://orcid.org/0000-0001-8035-5300 Andrey A. Dryakhlitsyn1, Engineer of Research Planning and Support Department; ResearcherID: AAH-5772-2021, ORCID: https://orcid.org/0000-0001-8218-8569 Affiliation1Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; е-mail: tataak@mail.ru, l.milovidova@narfu.ru2N. Laverov Federal Center for Integrated Arctic Research, Naberezhnaya Severnoy Dviny, 23, Arkhangelsk, 163000, Russian Federation; е-mail: tataak@mail.ru Keywordshardwood, bisulfite pulp, technological process, pulp properties, neutral sulfite pulp, containerboard, flutingFundingThe research was carried out at the Innovative facilities Engineering and Innovation Center “Advanced Northern Bioresources Processing Technologies” of the Northern (Arctic) Federal University named after M.V. Lomonosov, Arkhangelsk, Russia.For citationKoroleva T.A., Milovidova L.A., Dryakhlitsyn A.A. Production of High-Yield Hardwood Pulp by Bisulfite Cooking. Lesnoy Zhurnal [Russian Forestry Journal], 2021, no. 3, pp. 161–169. DOI: 10.37482/0536-1036-2021-3-161-169References1. Bobrov A.I., Mutovina M.G., Bondareva T.A., Malyshkina V.K. Production of Fibrous Semi-Finished Products from Hardwood. Moscow, Lesnaya promyshlennost’ Publ., 1984. 245 p.2. Galeyeva N.A. Semi-Chemical Pulp and High Yield Pulp Production. Moscow, Lesnaya promyshlennost’ Publ., 1970. 317 p. 3. State Standard. GOST 10070–74. Pulp and Semi-Pulp. Method for Determinating Kappa Number. Moscow, Izdatel’stvo standartov, 1999. 6 p. 4. State Standard. GOST 20682–75. Paper for Corrugation. Method for Determining the Resistance of Corrugated Paper to Flat Compression (Concoro Medium Test). Moscow, Izdatel’stvo standartov, 1989. 6 p. 5. State Standard. GOST 13525.1–79. Fibre Semimanufactures, Paper and Board. Tensile Strength and Elongation Tests. Moscow, Standartinform Publ., 2007. 5 p. 6. State Standard. GOST 15815–83. Technological Chips. Specifications. Moscow, Izdatel’stvo standartov, 1992. 14 p. 7. State Standard. GOST 13525.8–86. Fibre Intermediate Products, Paper and Board. Method for Determination of Resistance to Bursting. Moscow, Standartinform Publ., 2007. 6 p. 8. State Standard. GOST 10711 – 97. Paper and Board. 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Effect of Eucalyptus Bark Contamination during Pulping of Mixed Southern Hardwoods. Tappi Journal, 2016, vol. 15, no. 11, pp. 707–715. DOI: https://doi.org/10.32964/TJ15.11.707 20. Tripathi S.K., Alam I., Bhardwaj N.K. Effect of Bark Content in Mixed Hardwood Chips on Pulp and Papermaking Properties. Nordic Pulp & Paper Research, 2020, vol. 35, iss. 3, pp. 235–331. DOI: https://doi.org/10.1515/npprj-2020-0017 21. Yorston F.N. Studies on Sulfite Pulping. Dominion Forest Service Bulletin, 1942, no. 97, pp. 20–29. Production of High-Yield Hardwood Pulp by Bisulfite Minimizing the Chlorine Content Cooking |
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