Research Article
Investigation into the Flow Properties of Coarse Solid Fuels for Use in Industrial Feed Systems
Table 3
Hopper half angle for all fuels using TIVAR 88, stainless steel, and mild steel as wall materials.
| Material | Hopper half angle (°) | TIVAR 88 | Stainless steel | Mild steel | Wet mild steel |
| Wood pellets | 33 | 17 | 34 | 10 | Torrefied wood pellets | 29 | 17 | 34 | 15 | Ground anthracite | 31 | 31 | 38 | 34 | Torrefied wood chips | 32 | 12 | 28 | 11 | Milled wood pellets | 31 | 37 | 38 | 14 | Pulverised coal | 13 | 14 | 13 | 0 |
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