Abstract: To effectively recover the valuable elements from the tailings of Dachang cassiterite multi-metal sulfide ore, pre-concentration for Tailing Discarding was tested on the tailing. The result shows that preconcentration for tailing discarding is effective for this tailing. It can discard tailing that has a yield of 44.66%, which can not only improve the feed grade but also reduce the concentration cost. The comparative tests with the processes of direct flotation of lead and antimony from the raw material and the flotation of rougher concentrate to separate lead and antimony show that tailing pre-discarding can achieve ideal metallurgical performance.

Key words: Cassiterite multi-metal sulfide ore, Preconcentration for tailing discarding, Lead and antimony