某铅锌矿选矿生产指标考察与分析研究

Study on Investigation and Analysis of Lead and Zinc Ore Production Indexes

为了提高选矿厂的浮选效率,获得较好的铅锌浮选指标,对选矿工艺流程进行考察,分别研究了矿浆pH、回水、原矿品位对铅锌浮选指标的影响。结果表明,矿浆pH值对铅浮选指标影响较小,矿浆pH过高抑制锌的浮选,铅锌粗选矿浆pH值为11左右时,铅锌浮选品位与回收率均最高;原矿铅锌品位增大铅锌精矿品位与回收率均显著增大,尾矿铅锌品位基本不变;在磨矿全采用回水时造成铅浮选泡沫发粘,分选效果差,铅浮选回收率下降,铅锌浮选中矿量大,使得浮选操作难控制;经分析铅锌浮选尾矿中多为连生体,需细磨铅锌才充分单体解离。

In order to improve flotation efficiency of concentrator, a better flotation index of lead-zinc ore was obtained, and the technological process of mineral processing was investigated. The influence of pH, return water and raw ore grade on the flotation index of lead-zinc ore was studied respectively. The results show that the pH has little effect on the Pb flotation index, high flotation pulp pH inhibition of zinc, lead and zinc roughing pulp pH is about 11, the lead-zinc flotation grade and recovery rate were the highest;the higher ore grade lead-zinc flotation concentrate grade and recovery rate were significantly increased, and the tailings grade basically unchanged. When the feed water is damming used, the viscosity of lead flotation froth and the separation effect is poor, the operation of lead flotation is difficult to control, and the recovery rate of lead flotation is decreased. By analysis, it was found that lead-zinc flotation tailings are most coenobium, needing to fine grinding of Pb and Zn for monomer dissociation.