【摘要】 广西某低品位难选铅锌矿含铅0.61%,含锌2.61%,选矿厂采用铅、锌各一次粗选、两次扫选、四次精选优先浮选工艺流程,因生产过程中,流程容易波动,影响铅锌浮选指标。为给现场工艺流程优化改造提供依据,在工艺矿物学研究的基础上,对该矿石进行了选矿优化试验研究。试验结果表明,在原矿磨矿细度不变的条件下,通过优化铅锌的药剂制度,并对锌中矿进行再磨,闭路试验可获得铅精矿含铅52.78%、铅回收率43.36%,锌精矿含锌50.49%、锌回收率为86.50%。相比现场生产指标,铅精矿品位提高了7.67%,铅回收率提高了10.92%,锌回收率提高了4.35%,铅锌浮选指标得到了明显改善。更多还原

【Abstract】 A low-grade lead-zinc sulfide ore in Guangxi contains Pb 0. 61%,Zn 2. 52%. With the present preferential flotation process of one roughing,two scavengings and four cleanings for lead and zinc separately,the production operation of concentrator is unstable and the phenomenon of flotation fluctuates greatly,which lead to bad lead-zinc production index. In order to provide basis for transformation of on-site process,based on the process mineralogy research of the ore,the beneficiation optimization test was conducted. The results showed that lead concentrate containing Pb 52. 78% with Pb recovery of 43. 36%,zinc concentrate containing Zn 50. 49% with Zn recovery of 86. 50% can be obtained through the optimization of flotation reagent system and regrinding of the zinc middling by the same grinding fineness of ROM. Compared with on-site process,the Pb grade and recovery of lead concentrate increased by 7. 67% and 10. 92% respectively,the recovery of zinc concentrate increased by 4. 35%.The flotation index of this lead-zinc ore have been improved significantly.更多还原