内蒙古某铅锌硫化矿浮选试验研究

Experimental study on Flotation of a Lead-Zinc Sulfide Ore in Inner Mongolia

内蒙古某铅锌矿矿石性质复杂,原矿铅锌品位低,含硫较高,为更好地回收利用该铅锌矿资源,对浮铅尾矿采用硫酸铜作硫化锌矿物活化剂,丁基黄药作捕收剂,2#油作浮选起泡剂,经二次粗选、二次扫选浮选出锌硫混合粗精矿,对混合粗精矿再磨,然后采用石灰+腐植酸钠强化抑制硫铁矿物,并添加少量硫酸铜和丁基黄药活化捕收可浮性较差的铁闪锌矿,经一次分离粗选、二次扫选、三次精选分离得到锌精矿和硫精矿。闭路试验在原矿含铅1.19%、含锌2.36%的条件下,可获得含铅45.80%、含锌2.54%,铅回收率71.32%的铅精矿;含铅0.86%、含锌44.38%,锌回收率85.95%的锌精矿,新工艺锌回收率较现场工艺提高7.29个百分点,为该铅锌矿的实际生产提供了指导。

The ore properties of a lead-zinc mine in Inner Mongolia are complex, with low grade of lead and zinc in the raw ore, and high sulfur content. In order to better recycle the lead-zinc mine resources, copper sulfate was used as zinc sulfide mineral activator for floating lead tailings, butyl xanthate was used as collector, and 2#oil was used as flotation foaming agent. The zinc-sulfur mixed coarse concentrate was selected by secondary roughing and secondary scavenging flotation, and the mixed coarse concentrate was reground. Then, lime and sodium humate were used to strengthen the inhibition of pyrite minerals, and a small amount of copper sulfate and butyl xanthate were added to activate and collect the iron sphalerite with poor floatability. Zinc concentrate and sulfur concentrate were obtained by primary separation roughing, secondary scavenging and tertiary cleaning. In the closed-circuit test, under the condition of 1.19% of lead and 2.36% of zinc in the raw ore, a lead concentrate with 45.80% of lead, 2.54% of zinc and 71.32% of lead recovery can be obtained. And a zinc concentrate was obtained with 0.86% of lead, 44.38% of zinc and 85.95% of zinc recovery. The zinc recovery of the new process is 7.29 percentage points higher than that of the on-site process, which provides a guidance for the actual production of the lead-zinc mine.