泡沫中分选 (SIF)技术是基于将矿浆直接给入液体介质表面上的泡沫层中。这一技术为粒度达几个毫米的矿物分选提供了一种有效的方法。因此 ,SIF技术能大幅度节省磨矿能耗和浮选药剂。在本工作中 ,应用实验室型和半工业型SIF试验设备对来自各种工业资源的磷灰石、方解石和硅酸盐矿物进行浮选试验。在实验室中也对金刚石进行浮选试验研究。结果发现 ,上述所有矿物在粒度为 3mm以下时均能用SIF法成功地浮选。分级回路中的粗粒级试验表明 ,对此粒度 (特别是 0 1～ 0 5mm)用一段SIF作业可以获得回收率为 90 %以上的合格方解石精矿。同样地 ,磷灰石在没有磨到常规浮选所需的细度下 ,粗粒磷灰石也得到很好的富集。SIF也可用来从常规浮选尾矿中回收粗粒磷灰石。测定了有效工作表面为 1m2 的半工业浮选机的处理量 ,其值为 3 0t/ (m2 ·h)。目前 ,安装了工业规模SIF浮选机 ,用于回收粗粒磷灰石 Sush-foam sorting (SIF) technology is based on the direct injection of pulp into the foam layer on the surface of liquid media. This technique provides an effective method for sorting minerals to a few millimeters in size. Therefore, SIF technology can significantly reduce grinding energy consumption and flotation reagents. In this work, apatite, calcite and silicate minerals from various industrial sources were subjected to flotation tests using laboratory and semi-industrial SIF test equipment. In the laboratory, diamond flotation experiments are also conducted. As a result, it was found that all the above minerals can be successfully flotated by the SIF method at a particle size of 3 mm or less. The coarse-grading tests in the grading circuit show that qualified calcite concentrates with a recovery of 90% or more can be obtained with this SIF operation for this particle size (especially 0 1 ~ 0 5 mm). Likewise, apatite is also well enriched without the fineness required for conventional flotation. SIF can also be used to recover coarse-grained apatite from conventional flotation tailings. The working capacity of a semi-industrial flotation machine with an effective working surface of 1 m2 was measured and the value was 30 t / (m2 · h). Currently, industrial-scale SIF flotation machines are installed for the recovery of coarse-grained apatite