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2019 Vol.51, Issue 5 Preview Page
Refining Characteristics of Hardwood Pulp Using Straight- and Curved-bar Plates: A Time Series Study
Huan Liu12†
,
Jixian Dong12‡
,
Xiya Guo12
,
Xiaojun Jiang3
,
Chong Luo4
,
Xiaohui Tian4
,
Ruifang Yang12
,
Litao Zhang4
,
Bo Wang12
,
Yan Yan5
1College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021
2China Key Laboratory of Light Industry Equipment Manufacturing Intelligence, Xi’an, Shaanxi Province, 710021
3Nantong Huayan Casting Co., Ltd., Nantong, Jiangsu Province, 226403
4Henan Cigarette Industry Sheet Co., Ltd., Henan Province, 461100
5College of Mechanical and Electrical Engineering, Xi’an Polytechnic University, Xi’an, Shaanxi Province, 710048
†Corresponding author: E-Mail: liuhsust@126.com
‡Co-corresponding Author: E-Mail: djx@sust.edu.cn
30 October 2019. pp. 45-60
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Abstract

There are obvious differences in the refining characteristics of plates with straight bars compared to curved bar plates having the same bar parameters during refining. The objective of this research is to explore the difference in the refining characteristics of the straight bar and curved bar plates on experimental and theoretical studies. The bar angle of the curved bar plate is defined, and the two plates are used in the refining of bleached sulphate eucalyptus pulp (BSEP). Samples at different refining times were collected, and the properties of the fibers, pulp, and paper were detected and analyzed. It was found that the curved bar and straight bar plates have a similar influence on the pulp SR freeness. However, the curved bar plate effectively retained the fiber length, which means that its fiber cutting effect is weaker than that of the straight bar plate. Meanwhile, the fiber external fibrillation of the samples refined by the curved bar plate was better than that of the samples refined by the straight bar, which showed a higher tensile and tear index of the formed paper. Through the theoretical analysis of refining intensity via characterization of the parameter bar edge length (BEL), the specific edge load (SEL) of the curved bar plate was lower, and the refining characteristics predicted by the refining intensity were similar to the results from the experiments conducted in this paper.

Keywords
Low consistency refining
hardwood pulp
straight bar
curved bar
refining characteristics
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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 51
  • No :5
  • Pages :45-60
  • Received Date : 2019-08-26
  • Revised Date : 2019-09-15
  • Accepted Date : 2019-10-04
  • DOI :https://doi.org/10.7584/JKTAPPI.2019.10.51.5.45
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