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Outline
Based on the spiral cutting pick cutting and crushing method, the cutting and crushing behavior of spiral drum cutting picks on the ore body and the cutting and crushing process were analyzed, and a dynamic model for ore body cutting and crushing based on pick cutting had been constructed. Based on the HMB contact model in EDEM, a simulation model of cutting picks cutting cobalt-rich crust ore bodies was established, a test platform for simulating ore body crushing was prepared, and verification tests on the cutting and crushing force characteristics of single-tooth and full-tooth cutting were carried out. Test and simulation results are basically consistent in overall trends. In the single-tooth spiral drum test, when the cutting speed increases from 0.05 m/s to 0.1 m/s, the cutting resistance increases by 12.2％. In the full-tooth spiral drum test, when the cutting depth increases from 10 mm to 30 mm, the cutting resistance increases by 110％, and the load fluctuation coefficient increases by 43.4％. With the vibration excitation-assisted crushing method, when the cutting depth is 20 mm and 30 mm, the cutting resistance decreases by 16％ and 10％ respectively. When the cutting depth is 30 mm, the load fluctuation coefficient increases by 16.7％. Test results show that compared with cutting speed, cutting resistance is more sensitive to cutting depth. The greater the cutting depth or the faster the cutting speed, the greater the load fluctuation. The adoption of the vibration excitation-assisted crushing method helps reduce the required cutting force, but the cutting vibration intensifies. The research results can provide technical support for the study on operating parameters of the cutting and crushing technology for deep-sea cobalt-rich crusts and the development of crushing heads.
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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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