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Outline
To elucidate the electrochemical mechanism of the interaction between butyl xanthate (KBX) and gold minerals under alkaline conditions, and to provide theoretical support for the optimization of alkaline flotation processes for gold-bearing sulfide ores, unidirectional voltammetry, Tafel polarization curve method, and galvanostatic step technique were employed to systematically investigate the interfacial electrochemical behavior of a gold electrode in butyl xanthate solution at pH=9.18. The results indicate that the oxidation reaction of KBX on the gold electrode exhibits mixed electrochemical-mass transfer control characteristics. The oxidation product is the dimer X2, and the forward reaction rate constant is 1.524 cm/s. The interaction between the gold electrode and the KBX system intensifies with increasing collector concentration. The chemisorption of butyl xanthate on the gold surface constitutes the critical rate-controlling step of the reaction. Process parameters such as grinding fineness and stirring intensity significantly affect the interaction efficiency between the collector and the mineral. The exchange current density for the reduction on the gold electrode surface, measured by the galvanostatic step technique, is 0.075 A/m2, which is in high agreement with the corrosion current density obtained from the Tafel method, thereby verifying the reliability of the results.
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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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