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采用空气和水介质操作的半工业型浮选柱(0.91m×13.5m)及实验室型浮选柱(0.057m×9.5m)捕集区中的充气特性是通过压力测定而确定的,这些特性是以间断的和连续的方式进行确定。对于半工业型浮选柱而言,各个压力测定点之间应保持最小距离,以期得到可靠的结果。而对于实验室型浮选柱而言,则要求三次方多项式与压力-高度的数据相拟合。已表明水压计对传感器及过程干扰的敏感性比压力变换器的敏感性低。充气量分布表明,在浮选柱高度为8～10m范围内充气量几乎成倍地增加,分布特性曲线不是线性的,而且沿浮选柱顶部方向梯度增大。当气体速度大于1cm/s时尤其如此,特性曲线不能通过简单的气泡扩散模型来预测。对在各种浮选柱设计及操作条件下充气量随捕集区高度的增大而明显增加这一新发现的推断进行了讨论。
The aeration characteristics of the semi-industrial flotation column (0.91 m × 13.5 m) and the laboratory-type flotation column (0.057 m × 9.5 m) in the capture zone operated by air and aqueous media are determined by pressure measurement, and these Features are determined in an intermittent and continuous manner. For semi-industrial flotation columns, the minimum distance between each pressure measurement point should be kept in order to obtain reliable results. For laboratory flotation columns, the cubic polynomial is required to fit the pressure-height data. It has been shown that the pressure gauge is less sensitive to sensor and process disturbances than pressure transducers. The distribution of aeration shows that the aeration volume almost doubled in the range of flotation column height of 8 ~ 10m, the distribution characteristic curve is not linear, and the gradient along the top of the flotation column increases. This is especially true when the gas velocity is greater than 1 cm / s, and the characteristic curve can not be predicted by a simple bubble diffusion model. Discussion of the newly discovered inference that the inflated volume increases significantly with increasing catchment height under various design and operating conditions of the flotation column is discussed.