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Injection characteristics of side-blown lance in a bath smelting furnace directly govern reaction intensity and smelting efficiency. In this study, stirring enhancement mechanism of a novel side-blown lance with an adjustable rotation angle was investigated by computational fluid dynamics (CFD), and structural parameters of the lance were optimized. A volume-of-fluid (VOF) multiphase flow model coupled with the realizable k-ε turbulence model was employed to conduct transient simulations of gas-liquid two-phase flow in an oxygen-enriched side-blown smelting furnace. Influence of lance rotation angle (0°, 15°, 30°, 45°, and 60°) on flow field and mixing performance of the molten bath was analyzed. Results indicated that lance rotation angle exerted a nonlinear control effect on bath hydrodynamics. A moderate rotation angle (around 30°) effectively enlarged gas-induced disturbance region, accelerated interfacial renewal, and improved the uniformity of bath stirring. In contrast, either a non-rotating angle (0°) or an excessively large rotation angle (60°) led to pronounced flow drift and deteriorated local mixing. Overall, the proposed side-blown rotatable lance, through appropriate optimization of rotation angle, can enhance bath stirring while simultaneously ensuring furnace lining integrity and prolonging lance service life. The findings provided a theoretical basis and engineering guidance for lance design and optimization in large-scale oxygen-enriched side-blown smelting furnaces.
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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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