Investigating the influence of work piece geometry on the specific energy use in size reduction with a multi-blade shaft mill

Abstract

This study investigated the specific milling energy of rectangular pine (Pinus sylvestris L.) boards using a new size reduction technology, which can produce fine wood powders in a single-step operation. Multilinear regression (MLR) analysis was used to model the milling energy of a multi-blade shaft mill through a designed series of experiments having three input parameters: the moisture content of the board, milling blade speed and board feeding speed. The observed specific milling energy ranged from 60 to 172 kWh t−1 [DM] and the MLR model showed it was proportional to the blade speed and the moisture content. The results suggest that multi-blade shaft milling is a two-dimension extension of singular circular blade milling with regard to work piece shape and sawblade teeth engagement effects. The findings were compared with the specific milling energy of pine logs obtained in a previous study.

Keywords

Comminution; Wood powder technology; MBSM; Fine grinding; Experimental design; Milling

Published in

Biosystems Engineering
2021, volume: 209, pages: 210-215

SLU Authors

• Das, Atanu Kumar

  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    

• Agar, David

  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    

• Larsson, Sylvia

  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    

• Rudolfsson, Magnus

  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    

Global goals (SDG)

SDG9 Industry, innovation and infrastructure

UKÄ Subject classification

Wood Science

Publication identifier

• DOI: https://doi.org/10.1016/j.biosystemseng.2021.07.002

Permanent link to this page (URI)

https://res.slu.se/id/publ/112816