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Outline
To explore the feasibility of using nano-ceramic balls in primary ball mill, a ball milling test was conducted on high-pressure roller mill product with steel balls and nano-ceramic balls as grinding media, and the particle size distribution characteristics and magnetic separation effect of the ground products were studied. The results indicate that with the feed materials singly in a size range of 2-3 mm or 1-2 mm, use of nano-ceramic balls in combination with steel balls as the medium can reduce the overall grinding effect; while with the feed material singly in a size range of 0.6-1 mm, 0.3-0.6 mm, 0.15-0.3 mm or 0.074-0.15 mm, a combination of nano-ceramic balls and steel balls has a synergistic effect, which can enhance grinding performance; with the feed material singly in a size range of 0.3-0.6 mm, 0.15-0.3 mm or 0.074-0.15 mm, the mixed media with 50% steel balls can achieve the same grinding effect brought by the media with 80% steel balls; with the feed material in a size range of 0.074-0.15 mm, the combination of two balls brings the same grinding effect as the single use of steel balls; with the feed material in a size range less than 0.6 mm, the combination of two balls can bring grinding effect approximately equivalent to that by singly using steel balls. It is concluded that a combination of nano-ceramic balls and steel balls can be used instead of single steel balls in the primary grinding of materials in size range less than 0.6 mm.
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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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