Investigating the influence of work piece geometry on the specific energy use in size reduction with a multi-blade shaft mill. (September 2021)

• Record Type: Journal Article
• Authors: Das, Atanu Kumar; Agar, David A.; Larsson, Sylvia H.; Rudolfsson, Magnus
• Is Part Of: Biosystems engineering. Volume 209(2021)
• Page Start: 210
• Page End: 215
• Publication Date: 2021-09
• Subjects: Comminution -- Wood powder technology -- MBSM -- Fine grinding -- Experimental design -- Milling; Bioengineering -- Periodicals; Agricultural engineering -- Periodicals; Biological systems -- Periodicals; Génie rural -- Périodiques; Systèmes biologiques -- Périodiques; 631
• DOI: 10.1016/j.biosystemseng.2021.07.002
• Languages: English
• ISSNs: 1537-5110

Abstract

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. Graphical abstract: Image 1 Highlights: Modelled specific milling energy is proportional to moisture content and blade speed. Wood shape and shaft teeth engagement in two dimensions influence milling energy. Multi-blade shaft milling is a two-dimension extension of singular circular blade milling. MBSM milling is analogous to sawing wood and opposite to impact-based milling.