本文叙述矿石性质、选矿工艺流程,以及为提高石墨精矿品位而进行的流程和设备改进。通过这些改进使选矿回收率提高6.49%。本文以南墅石墨矿30多年生产实践和选矿试验为依据,并通过对流程的分析,从流程结构、选矿设备和药剂等方面提出提高石墨精矿品位和回收率的途径。最后提出鱗片石墨浮选的建议流程。这个建议流程的特点是:原矿粗磨,粗扫选丢尾矿,合格大片石墨提前分出,细片石墨强化再磨再选直接生产电炭石墨,浮选和化学处理相结合生产高炭石墨。 This article describes the nature of the ore, the beneficiation process, and the process and equipment improvements to improve the grade of the graphite concentrate. Through these improvements, the ore dressing recovery rate increased by 6.49%. Based on more than 30 years’ production practice and beneficiation test in Nanshu graphite mine, this paper puts forward ways to improve grade and recovery rate of graphite concentrate from the aspects of process structure, mineral processing equipment and medicament through the analysis of the process. Finally proposed flake graphite flotation suggestion flow. The process of this proposal is characterized by: raw coarse grinding, rough scalping throwing tailings, qualified large pieces of graphite in advance out of thin graphite enhanced regrinding re-direct production of carbon graphite, flotation and chemical treatment of high carbon graphite .