某复杂铅锌矿锌精矿降碳试验研究

Experimental Study on Reducing Carbon Content in Zinc Concentrate of Complex Lead⁃Zinc Ore

针对某复杂铅锌矿选矿所得锌精矿含碳量高的问题,进行了锌精矿降碳试验。采用可溶性淀粉为碳抑制剂,闭路试验获得了锌品位48.71%、含碳0.86%、锌回收率90.28%的锌精矿;与原工艺指标相比,在提高锌精矿品位及回收率的同时,碳含量降至1%以下,降碳效果显著。

As for a zinc concentrate collected from mineral processing of a lead⁃zinc ore,an experimental study was carried out to reduce the carbon content therein.With soluble starch as the carbon depressant,a concentrate with Zn grade of 48.71%,carbon content of 0.86%and Zn recovery of 90.28%was obtained from a closed⁃circuit test.Compared with the on⁃site indicators,both the Zn grade and recovery of concentrate are increased by using this new process,while the carbon content therein is reduced to less than 1%,showing a remarkable carbon⁃reduction effect.