Abstract: Mining tailings, as a secondary resource, is attracting greater and greater attention.The cyclone static microbubble flotation column, a kind of highly efficient equipment for fine particle separation, was used in the re-concentration test of Jinchuan copper-nickle tailings, and the effect of using the flotation column to raise the valuable metal recovery from tailings was investigated.As a result, a nickel concentrate grading 3.763% at a recovery of 12.53% and a copper concentrate grading 2.351% were obtained from the production tailings by the process consisting of classification, regrinding, one rough and three cleans, achieving the expected results.

Key words: Cyclone static microbubble flotation column, Copper-nickel tailings, Tailing re-concentration