Abstract This work focuses on a novel treatment process for Brazilian iron bearing fine tailings by rougher reverse column flotation assisted by high-intensity conditioning (HIC) with a new cationic collector in a conventional column cell (CCC) and in a modified three-product column (3PC). The samples (30–35% solids), corresponded to very fine (49% of the mass below 10 µm) and low-grade iron bearing tailings (40–43% Fe) collected from the thickened overflow of the desliming hydrocyclones. The objectives were to obtain two “concentrates” as feeds to future beneficiation processes; first, a non-floated product with a minimum grade about 48–50% Fe content (iron concentrate) and the floated material with a maximum grade of 15% Fe (named siliceous concentrates). Both goals were achieved due to the high selectivity of a chemical composite of amide-amines acting as a flotation collector/frother for the siliceous gangue particles. In addition, HIC was needed to enhance the flotation recoveries by improving capture by bubbles; without HIC, the mass being floated was very low (

中文翻译：

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HIC和新型阳离子捕收剂辅助的含铁细尾矿柱反粗浮选

摘要 这项工作的重点是在常规柱槽 (CCC) 和改进的三产品柱中通过高强度调节 (HIC) 辅助的粗反浮选处理巴西含铁细尾矿的新工艺。 （3 件）。样品（30-35% 的固体）对应于从脱泥水力旋流器的浓缩溢流中收集的非常细（49% 的质量低于 10 µm）和低品位含铁尾矿（40-43% Fe）。目标是获得两种“精矿”作为未来选矿过程的原料；首先，非浮选产品的铁含量最低为 48-50%（铁精矿），浮选材料的铁含量最高为 15%（称为硅质精矿）。由于酰胺-胺的化学复合物作为硅质脉石颗粒的浮选捕收剂/起泡剂的高选择性而实现了这两个目标。此外，还需要 HIC 通过改善气泡捕获来提高浮选回收率；没有 HIC，漂浮的质量非常低（