某铅锌尾矿中锌矿物的回收利用工艺研究

Study on the recovery of zinc minerals from the tailing of a lead & zinc mineral processing plant

本文所用试样为贵州某铅锌矿老尾矿,由于存放时间比较长,矿石性质发生了较大的变化,分选难度很大,因此,本文主要考虑回收其中的锌矿物。通过大量的探索性试验,确定了先选硫化矿,再选氧化矿的浮选原则流程,又通过一系列的试验,确定先选硫化矿时,用硫酸铜活化后用丁基黄药捕收,而选氧化矿时采用硫化钠为硫化剂,同样用硫酸铜活化,然后用丁基黄药和羟肟酸联合捕收。最终确定了一次粗选、四次扫选、粗精矿精选三次、扫III精矿精选三次、两次精矿合并作为最后精矿的闭路流程,得到了锌精矿品位39.75%、回收率73.74%的指标。

The sample used in the experiment came from a Lead ＆amp;Zinc mineral processing plant of Guizhou province.The tailing of the plant had placed in the open area for more than a decade,and the properties of the mineral had greatly changed,which made it very difficult to separate.The exploratory experiments indicated that the ＂ZnS firstly collected,ZnO second＂ principle flowsheet was very necessary to the mineral.Then the reagents used in both collections were determined： in first flotation,CuSO4 was used to activate sphalerite, then Aero Xantathate was used as collector; in second flotation, NaS was used as sulphurateor, CuSO4as activator, Aero Xantathate and Hydroximic acid as collectors. The flowsheet-- ＂one roughing, four scavenging, the rough concentrate and the concentrate of the third scavenging were both concentrated three times, the two concentrate mixed as the final concentrate＂ was attained through a great deal of experiments. The concentrate got from the closed circuit contained 39.68% Zn with a recovery of 73.74%.