Full
Outline
In order to quantitatively evaluate the flocculation effect of flocculants and acquire the change law of floc pore structure, fractal theory was introduced to analyze the fractal dimensions and flocculation effect of four flocculants, including ZYD, JYC-1, JYC-2 and ZYZ. The pore structures inside different flocculants samples were analyzed using three-dimensional reconstruction and CT slices, and the mechanism of tailings flocculation and settlement was revealed. Through the static and dynamic flocculation tests, the optimal flocculant type and process parameters were determined, and the relationship between the underflow mass concentration of slurry and the material layer height was deduced. The results show that ZYZ-type flocculant has the largest fractal dimension, which is 1.842 3, with the best flocculation settling effect. ZYZ-type flocculant forms flocs with larger size at a faster settling speed, and forms a better water-conducting channel, achieving a significant thickening effect. Through the static and dynamic flocculation tests, the slurry mass concentration of 20% and the flocculant unit consumption of 20 g/t were determined as the best flocculation process parameters. If the overflow mass concentration of slurry is up to 70%, the height of the sediment layer that needs to be settled is 731 mm. On-site industrial application shows that the average sand mass concentration of the thickener is 70%, the urination rate is no more than 5%, the slurry fluidity is good, and the filling effect is good.
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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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