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To investigate the release of dust, coarse (x50.3 = 980 μm) and fine (x50.3 = 3.6 μm) limestone was discharged into a wind tunnel using a model conveyor belt. Different test setups were used to measure the dust release in different phases of the discharge. The discharge mass flow, belt speed and wind tunnel air velocity were varied. Systematic differences were found between the two size fractions. The dust release of the fine material mainly takes place during the fall, while the dust release of the coarse material is dominated by the impact on the bulk pile. For the coarse material, a model for the individual release of dust-laden coarse material particles from the literature can be used as an explanatory approach. A different explanatory approach is required to describe the release of dust from the fine material.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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