A Pilot Scale Comparison of the Effects of Chemical Pre-treatments of Wood Chips on the Properties of Low Consistency Refined TMP 


After decades of research and development, the technology of thermomechanical pulping (TMP) has dramatically improved resulting in higher pulp quality, especially strength. However, the TMP industry is
still faced with the challenge of continually increasing energy costs. One approach to reducing the energy costs is to replace the second-stage high consistency (HC) refiner with several low consistency (LC)
refiners. This is based on the observation that low consistency refining is more energy efficient than high consistency refining. The limitation of LC refining is loss of paper strength due to the high frequency of
fibre cutting especially at high refining intensity. Chemical treatment combined with low consistency refining provides opportunity for even further energy savings. The chemical treatment could improve pulp
properties allowing for further energy reduction in the HC refining stage or reduced intensity during LC refining resulting in less fibre cutting. Indeed, it is also possible that the chemical treatment itself will
improve the resistance of the fibre to the cutting during LC refining.

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Author: Yu Sun, Meaghan Miller, Xue Feng Chang, James Olson, and Rodger Beatson
A Pilot Scale Comparison of the Effects of Chemical Pre-trea
A Pilot Scale Comparison of the Effects of Chemical Pre-treatments of Wood Chips on the Properties of Low Consistency Refined TMP, 2016 International Mechanical Pulping Conference
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