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在喷气精炼过程中,气泡的分散和细化是提高精炼效率的必要条件。在水模型实验中应用了单向的偏心搅拌模式来寻找最佳的气泡微细化条件。影响气泡微细化的因素有:搅拌模式、偏心度、搅拌转速、喷嘴结构、喷嘴的浸入深度以及气体流量。气体的喷入方式包括两种,一是从搅拌桨下方的喷嘴中直接喷入,二是从一个位于搅拌桨下方的弯管中喷入。在偏心搅拌模式下,漩涡远离了搅拌桨的轴心,小气泡产生于搅拌桨附近的强湍流或高剪切应力场中,随着机械搅拌产生的宏观流向漩涡方向移动。因此,单向的偏心搅拌模式能促进气泡在溶池内的细化和分散。
In the jet refining process, the dispersion and refinement of the bubbles are necessary for improving the refining efficiency. In the water model experiment, a one-way eccentric stirring mode was applied to find out the best bubble refining conditions. Factors that affect the finer air bubbles include: agitation mode, eccentricity, agitation speed, nozzle configuration, nozzle immersion depth, and gas flow rate. There are two ways of gas injection: one is to inject directly from the nozzle below the stirring paddle, and the other is to inject it from an elbow below the stirring paddle. In eccentric agitation mode, vortices move away from the axis of the agitator blade. Small bubbles originate in strong turbulent or high shear stress fields near the agitators and move toward the whirlpool with the macroscopic flow generated by mechanical agitation. Therefore, one-way eccentric stirring mode can promote the bubble in the pool of refinement and dispersion.