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The Effect of Wood Alignment on Wood Grinding – Part 1: Properties of Pulp and Fines Revealed in the Grinding Mechanism

Bioresources, 2016-05, Vol.11 (2), p.4201-4211 [Peer Reviewed Journal]

ISSN: 1930-2126 ;EISSN: 1930-2126 ;DOI: 10.15376/biores.11.2.4201-4211

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  • Title:
    The Effect of Wood Alignment on Wood Grinding – Part 1: Properties of Pulp and Fines Revealed in the Grinding Mechanism
  • Author: Saharinen, Erkki Tapani ; Särkilahti, Airi ; Salminen, Lauri Ilmari ; Heinemann, Sabine
  • Subjects: Fiber properties ; Grinding angle ; Groundwood ; Norway spruce ; Wood alignment
  • Is Part Of: Bioresources, 2016-05, Vol.11 (2), p.4201-4211
  • Description: In industrial wood grinding, logs are pressed against a rotating stone, with the logs and fiber axis parallel to the axis of the stone. The objective of this study is to clarify how the wood alignment affects the process and pulp properties. In this research, wood blocks were fed into a laboratory grinder with various alignments in relation to the surface of the grinding stone. The effects of the alignment on the properties of the pulp and the amount and quality of fines were measured. A grinding mechanism was proposed. The results show that the pulp quality is very sensitive to the angle between the stone surface and the log. In gentle refining, the fiber structure is loosened by fatigue before it is bent on the surface; pressure pulses produce fibrillar material, and fibers develop toward having good bonding ability. In forced grinding, the process is “violent”, and the fiber wears and becomes crushed immediately on the surface into small particles with low bonding ability.
  • Publisher: North Carolina State University
  • Language: English
  • Identifier: ISSN: 1930-2126
    EISSN: 1930-2126
    DOI: 10.15376/biores.11.2.4201-4211
  • Source: GFMER Free Medical Journals
    ROAD: Directory of Open Access Scholarly Resources
    DOAJ Directory of Open Access Journals
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