Full
Outline
To reveal the synergistic mechanism of mechanical vibration on tailings thickening and sand discharge, based on the mechanism of tailings slurry vibration thickening, an experimental system for vibration thickening independently developed was used to conduct discontinuous thickening and sand discharge experiments under vibration. The technical feasibility of mechanical vibration to improve tailings slurry thickening efficiency and promote underflow activation and sand discharge was verified. The results show that the accumulation of tailings particles in a conical structure within the thickener is the key to improving the mass concentration of the underflow. The eccentric vibration mechanism transmits energy in a sinusoidal harmonic motion, and the excitation range of the vibrating rod is related to the slurry density and vibrator mass. A cylindrical activation region is formed around the vibrating rod during vibration, with a larger radius when the yield stress is lower and the plastic viscosity is higher. Compared with the no-vibration condition, with the increase of feeding velocity under vibration, the underflow mass concentration is increased by an average of 7.74%, the solid content of overflow water is increased by an average of 10.11%, while the increase of the overflow water rising velocity is not obvious. The research results provide a basis for the development of mechanical vibration-assisted high-efficiency thickening equipment.
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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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