An operational strategy is proposed to improve the metallurgical performance of flotation cells subject to low-mineralized froths. This strategy consists of using a semi-continuous discharge into the concentrate, in which the froth is operated under loading and unloading periods. A transient model is developed to evaluate the proposed approach. The model is calibrated using experimental data from two industrial flotation banks. The metallurgical performances of the last cells of these banks are then simulated, considering the semi-continuous froth discharge. The results show that the semi-continuous mode significantly reduces gangue entrainment, improving the concentrate grade while maintaining approximately the same recovery. The semi-continuous strategy demonstrates good potential to enhance the metallurgical indexes under low-mineralized froths, as those in the last cells of rougher flotation banks.

中文翻译：

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半连续泡沫排出以减少低矿化泡沫下浮选池中细颗粒的夹带

提出了一种操作策略，以改善受低矿化泡沫作用的浮选槽的冶金性能。该策略包括使用半连续排放到精矿中的方法，其中泡沫在装料和卸料期间运行。开发了一个瞬态模型来评估所提出的方法。使用来自两个工业浮选库的实验数据对模型进行了校准。然后考虑半连续的泡沫放电，模拟了这些排的最后一个单元的冶金性能。结果表明，半连续模式显着减少了煤石的夹带，提高了精矿品位，同时保持了大致相同的回收率。半连续策略显示了在低矿化泡沫下提高冶金指标的良好潜力，