Ore dressing process for recycling lean magnetite

The invention belongs to the field of ore dressing, and particularly relates to an ore dressing process for recycling lean magnetite. According to the process, the initial taste and the concentrate taste of ore are improved through the processes of pre-concentration before grinding, pre-concentrated concentrate treatment, pre-concentrated tailing classification, high-frequency cascade screening classification, waste ore recycling and the like, the beneficiation ratio is reduced, the production cost of a subsequent beneficiation process is reduced, and the ore dressing process is highly efficient. 本领域属于选矿领域，具体涉及一种贫磁铁矿回收再利用的选矿工艺。该工艺通过磨前预选、预选精矿处理、预选尾矿分级、高频叠筛分级、废石再回收等过程提高了矿石的初始品味及精矿品味，降低了选矿比，同时降低了后续精选流程的生产成本，是一种较为高效的选矿工艺。