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Outline
The copper extraction isotherm of 15% LIX984N-C organic phase system was plotted via the phase ratio variation method. The number of extraction stages was determined by the McCabe-Thiele graphical method, and the key factors affecting copper extraction were investigated. The results show that the maximum saturated copper loading capacity of 15% LIX984N-C organic phase is 10.65 g/L, which is basically consistent with the reference value of product specifications. With feed copper mass concentration of 8.4 g/L and phase ratio of 2∶1, a two-stage continuous extraction in the 15% LIX984N-C organic phase can meet the production requirements, with the copper concentration in raffinate controlled below 0.2 g/L and the copper extraction efficiency exceeding 97.86%. Under the following conditions, including both the extraction flow ratio and stripping flow ratio at 2∶1, stripping acidity of 180 g/L, feed copper mass concentration of 8 g/L and feed acidity of 7 g/L, the copper extraction efficiency reaches 98.51% and an average net organic loading is 2.72 g/L. It is verified that LIX984N-C extractant possesses excellent comprehensive extraction performance, which can provide technical references for the practical production with copper hydrometallurgical process.
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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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