关键词: 石墨尾矿, 绢云母, 水力旋流器脱泥, 浮选

Abstract: A graphite tailing contains 6% of sericite. In order to provide basis for comprehensive recovery of this sericite, beneficiation experiments were carried out. According to the properties of the tailing, -19 μm slime with yield of 53.41% were firstly removed by Φ50 mm GSDF-type hydrocyclone with spigot and overflow port at 2 mm in diameter, under 0.2 MPa feeding pressure and 8% of feeding concentration,91.39% of sericite were enriched in sands settlement. Then, the sands with sericite content of 11.75% was treated by adopting the open-circuit flotation process of one roughing and four cleaning with lauryl amine, and sulphuric acid to modulate the slurry pH value to 3 and sodium silicate added properly in cleanings. Ultimately, sericite concentrate with sericite content and recovery of 85.11% and 77.53% respectively was achieved, which can meet the standards for rubber filler. Graphite tailings|Sericite|Desliming by hydrocyclone|Flotation