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泡沫浮选法具有分离效果好、操作简单等优点,近年来广泛应用于工业领域中。然而目前常规泡沫浮选塔存在夹带率高、分离效率低等缺点,也缺乏合理的动力学数学模型对其分离效果进行预测。在内循环泡沫浮选塔中,间歇分离条件下,首先对浮选分离动力学过程进行分析,选取6个取样高度点,拟合建立数学模型。研究结果表明,吸附过程符合颗粒内扩散模型,泡沫上吸附的铬离子的量与时间的平方根呈线性关系;pH值的变化对铬离子吸附影响较大;塔轴向浓度分布数学模型与实验值较为吻合,对分离效率分析和进一步的操作优化研究具有一定的实际意义。
Froth flotation separation method with good results, simple operation, etc., in recent years widely used in industrial fields. However, conventional foam flotation tower has the disadvantages of high entrainment rate and low separation efficiency, and lack of a reasonable mathematical model to predict the separation effect. In the internal circulating foam flotation tower, under the condition of intermittent separation, the kinetic process of flotation separation was first analyzed. Six sampling height points were selected to establish the mathematical model. The results show that the adsorption process accords with the intragranular diffusion model. The amount of chromium ion adsorbed on the foam has a linear relationship with the square root of the time. The change of pH value has a great influence on the adsorption of chromium ions. The mathematical model of axial concentration distribution and the experimental value Is more consistent, the separation efficiency analysis and further optimization of the operation has some practical significance.