Development of Fiber Properties in Full Scale HC and LC Refining, 2016 International Mechanical Pulping (IMPC) Conference


The aim of this work was to evaluate in more detail how fibers are developed during high consistency (HC) and low consistency (LC) refining. Three TMP mainline processes in mill operations were investigated for two configurations, one with only HC refining and the other with HC refining followed by LC refining. LC refining gave a similar increase in tensile index with increasing specific energy for the three lines, despite differences in the fiber property profiles of the feed pulps. At a given tensile index, LC refined pulps had a lower light scattering coefficient compared with only HC refining in the respective TMP line, but similar fiber length, strain at break, tear index and freeness. For two of the three lines, tensile index increased more with specific energy in LC than in HC refining. Whether installation of LC refining in a TMP line improves energy efficiency or not, depends on which pulp property(ies) the efficiency is related to, and also on the possibilities to optimize efficiency in the HC stages.  

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Author: R. Ferritsius, C. Sandberg, O. Ferritsius, M. Rundlöf, G. Daniel, K. Mörseburg, & D. Fernando
Development of Fiber Properties in Full Scale HC and LC Refi
Development of Fiber Properties in Full Scale HC and LC Refining, 2016 International Mechanical Pulping Conference
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