Official Journal of the Japan Wood Research Society
Table 3 The specific energy consumption (SEC) and product characteristics for forest harvest residuals (FHRs) ground with the rotor impact mill
From: Energy consumption of two-stage fine grinding of Douglas-fir wood
Feedstock | FHRs-1 | FHRs-2 | FHRs-3 | ||||
|---|---|---|---|---|---|---|---|
Sample weight (kg) | 9 | 80 | 80 | 80 | 9 | 5 | 9 |
Median size (µm) | 35 | 55 | 87 | 114 | 256 | 60 | 99 |
Mean size (µm) | 49 | 74 | 118 | 151 | 335 | 77 | 127 |
Product MC(%) | 3.4 | 3.6 | 4.4 | 4.0 | 6.8 | 4.04 | 4.9 |
Aerated density (kg/cm3) | 0.16 | 0.16 | 0.17 | 0.15 | 0.19 | 0.14 | 0.14 |
Tapped density (kg/cm3) | 0.34 | 0.33 | 0.31 | 0.26 | 0.26 | 0.28 | 0.27 |
Compressibility | 2.17 | 2.02 | 1.76 | 1.73 | 1.39 | 2.03 | 1.88 |
SEC (kWh/kg OD) | 2.31 | 1.29 | 0.43 | 0.50 | 0.21 | 1.26 | 0.68 |
Throughput (OD kg/h) | 9 | 17 | 50 | 45 | 110 | 17 | 31 |