Abstract: Iron grade of tailings in Meishan is high and particle is fine. It's difficult to dewatering, which limits its application in cement. In order to resolve the problems of tailings deposition, according to Meishan producing mining and mineral processing technology, the experiment of tailings dewatering and fine tailings thickening and solidification research were conducted. By using long cone hydrocyclone and ceramic filter technological process, more than 70% tailings can be used in cement production. Overflow of hydrocyclone processed by super-pressure thickener without rake, stable paste with concentration more than 52% can be obtained. Stabilizer MA and YX can well solidified paste, compressive strength of solidification can reach 0.20 MPa and 0.70 MPa after 3 d and 28 d, the solidification is hard to sliming, can satisfy the subsidence storage requirements.

Key words: Tailings, Dewatering, Super-pressure thickening, Solidification