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Multi-blade milling from log to powder in one step – Experimental design and results

Das, Atanu Kumar and Agar, David and Larsson, Sylvia and Holdo, Tobias and Fernando, Dinesh and Rudolfsson, Magnus (2021). Multi-blade milling from log to powder in one step – Experimental design and results. Powder Technology. 378 , 593-601
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Abstract

This study investigated a new technique for obtaining wood powders from whole logs (Pinus sylvestris L.) in a single-step operation. The performance of a prototype multi-blade shaft mill (MBSM) was evaluated using a designed series of experiments including three input parameters, i.e., the moisture content of the log, milling blade speed and log feeding speed, combined with multilinear regression (MLR) analysis. The milling performance was characterised by specific milling energy, particle size distribution and bulk density of powder. For MBSM powders (80 to 95% particles <1.0 mm), the specific milling energy ranged from 99 to 232 kWh t−1 DM. The mass per cent of particles <0.5 mm in MBSM powders ranged from 55 to 80% compared to 41% from hammer-milled powders. Powder bulk density varied from 138 to 264 kg m−3 DM and the moisture content of the milled log was the only significant (p < 0.05) factor affecting the bulk density of resulting powders (dried). MLR models show that the milling energy is inversely proportional to the moisture content, which indicates that moisture influences MBSM milling in a similar way as in the sawing of wood and opposite to that of impact-based mills (i.e. hammer mills).

Authors/Creators:Das, Atanu Kumar and Agar, David and Larsson, Sylvia and Holdo, Tobias and Fernando, Dinesh and Rudolfsson, Magnus
Title:Multi-blade milling from log to powder in one step – Experimental design and results
Year of publishing :2021
Volume:378
Page range:593-601
Number of Pages:9
ISSN:0032-5910
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
Keywords:Multi-blade shaft mill (MBSM), Experimental design, Wood powder, Particle size distribution (PSD), Specific milling energy
URN:NBN:urn:nbn:se:slu:epsilon-p-108186
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-108186
Additional ID:
Type of IDID
DOI10.1016/j.powtec.2020.10.026
ID Code:17844
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
Deposited By: SLUpub Connector
Deposited On:19 Oct 2020 17:20
Metadata Last Modified:20 Oct 2020 05:01

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