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Title: Effects of multi-stage milling method on the energy consumption of comminuting forest residuals

Source: Industrial Crops and Products. 145: 111955. 6 p.

Author(s)Liu, Yalan ; Wang, Jinwu ; Barth, John C.; Welsch, Kelly R.; McIntyre, Vincent ; Wolcott, Michael P.

Publication Year: 2020  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4706-2B

Abstract: This study has evaluated the comminution energy reduction efficiency of a multi-stage milling method and established a mathematical mode for estimating the specifc energy consumption as a function of moisture content and particle size change. A Bliss hammer mill was employed to grind the feedstock targeting at two fna screen sizes of 0.84 and 0.69 mm. For the target screen size of 0.84 mm, the single-stage, two-stage, and threestage milling process were employed. Whereas, the single-stage, two-stage, and four-stage milling process were employed for the 0.69-mm target screen size. Four moisture content levels were employed, i.e. 6 %, 12 %, 18 %, and 28 %. While the final particle sizes and distributions were similar independent of the intermediate stages, the results showed that the single-stage milling consumed 43 % more energy than the three-stage grinding process. A so, multi-stage milling runs more stable in grinding high-moisture content materials. In addition, a mathematical mode based on Bond’s comminution law was established to predict the specifc energy consumption with the moisture content and the particle sizes before and after grinding.

Keywords: Moisture content; hammer mill; multi-stage milling; comminution laws; energy consumption; particle size and distribution; size energy; relationship

Publication Review Process: Formally Refereed

File size: 4,096 kb(s)

Date posted: 09/29/2020

This publication is also viewable on Treesearch:  view
RITS Product ID: 99643
Current FPL Scientist associated with this product
Wang, Jinwu
Research Forest Products Technologist
  

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