高银低铅低锌多金属矿浮选试验研究

Study on the Flotation Experiment of a High-silver,Low-lead and Low-zinc Polymetallic Ore

某高银低铅低锌多金属硫化矿银品位达到76.28 g/t,含铅0.78%,含锌0.69%。为有效回收矿石中的有价组分,基于系统的工艺矿物学研究,提出高效抑制锌硫,强化回收银铅技术思路,最终确定采用银铅优先浮选—锌硫混合浮选—锌硫分离工艺流程。通过条件试验确定适宜的药剂制度,最终全流程试验获得银品位4312.2 g/t、银回收率85.19%、铅品位45.28%、铅回收率88.89%的银铅精矿;锌品位45.39%、锌回收率79.09%的锌精矿;硫品位32.17%、硫回收率79.77%的硫精矿。试验指标良好,实现了矿石中银、铅的良好回收,并综合回收了锌和硫,可为同类铅锌矿石的开发利用提供技术依据。

A polymetallic sulfide ore with high-silver,low-lead and low-zinc contains silver of 76.28 g/t,lead of 0.78%and zinc of 0.69%.In order to effectively recover valuable components in the ores,the technical ideas of efficiently inhibiting zinc-sulfur and strengthening recovery of silver-lead were put forward based on systematic process mineralogy research.Finally,the technological process of differential flotation for silver and lead,bulk flotation for zinc and sulfur,separation for zinc and sulfur was determined.The suitable reagent system was determined through the condition test.Finally,silver-lead concentrate with silver grade of 4312.2 g/t,silver recovery rate of 85.19%,lead grade of 45.28%,lead recovery rate of 88.89%was obtained through the whole process test.Meanwhile,zinc concentrate with zinc grade of 45.39%and zinc recovery rate of 79.09%,and sulfur concentrate with sulfur grade of 32.17%and sulfur recovery rate of 79.77%were obtained.The test indexes are good,which achieved better recovery of the silver and lead in the ore.Also,the zinc and sulfur are recovered comprehensively.The research could provide technical basis for the development and utilization of similar lead-zinc ores.