Successful mineral processing depends largely on the adequate consideration of its interactions with water. Considering water scarcity and the cost for the use of a fresh water, the mineral industry has been looking for viable alternatives for the reuse of process water. However, recycling water from tailings dams can contain large amounts of dissolved species, particulate matter, organic matter from residual reagents, etc., which negatively affect the ore concentration stage. In this work, the deleterious effects of calcium, magnesium, and phosphorus ions, present in recycling water, on the apatite flotation performance have been quantified. It also investigated the use of dissolved air flotation (DAF), associated with coagulation/flocculation treatment to remove most of the contaminants present in the water. Effect of pH on this combined process of wastewater treatment has also been investigated. Removal efficiencies of calcium, magnesium, and phosphate ions and also turbidity have been measured. Water from a tailing dam of an apatite processing industry has been treated by this technique and the produced water used in the flotation of apatite in column. Results have shown that the use of recycling water after the wastewater treatment proposed in this work led to a good performance of apatite flotation, leading to recovery (80.5%) and grade (31.2%) of P₂O₅ highest than minimum acceptable in this industry.

成功的矿物加工很大程度上取决于对与水相互作用的充分考虑。考虑到缺水和使用淡水的成本，采矿业一直在寻找可行的替代方法来回用工艺用水。但是，从尾矿坝回收的水可能包含大量溶解的物质，颗粒物，残留试剂中的有机物等，这会对矿石浓缩阶段产生负面影响。在这项工作中，已经定量了循环水中存在的钙，镁和磷离子对磷灰石浮选性能的有害影响。它还研究了与混凝/絮凝处理相关的溶解气浮法（DAF）的使用，以去除水中存在的大多数污染物。还研究了pH值对该废水综合处理过程的影响。已经测量了钙，镁和磷酸根离子的去除效率以及浊度。磷灰石加工行业的尾矿坝中的水已通过该技术进行了处理，所产生的水用于柱中磷灰石的浮选。结果表明，这项工作中提出的废水处理后使用循环水导致磷灰石浮选性能良好，从而导致磷的回收率（80.5％）和品位（31.2％）磷灰石加工行业的尾矿坝中的水已通过该技术进行了处理，所产生的水用于柱中磷灰石的浮选。结果表明，这项工作中提出的废水处理后使用循环水导致磷灰石浮选性能良好，从而导致磷的回收率（80.5％）和品位（31.2％）磷灰石加工行业的尾矿坝中的水已通过该技术进行了处理，所产生的水用于柱中磷灰石的浮选。结果表明，这项工作中提出的废水处理后使用循环水导致磷灰石浮选性能良好，从而导致磷的回收率（80.5％）和品位（31.2％）₂ O ₅高于该行业可接受的最小值。