四川某硫化铅锌矿石选矿工艺研究

四川某硫化铅锌矿现场工艺存在铅锌分离困难，铅精矿含锌较高，铅、银回收率低等问题。为改善现场分选指标，在对该硫化铅锌矿石性质研究的基础上，进行了选矿工艺试验。化学多元素分析表明：矿石铅、锌、银含量分别为1.03%、6.28%、37.16 g/t，矿石主要组成矿物为闪锌矿和方铅矿，脉石矿物以白云石、方解石和石英为主。选矿试验结果表明：采用在中性环境下1粗3精1扫选铅，高碱环境下1粗1精1扫选锌的浮选工艺，可以得到铅品位57.45%、含锌6.09%、含银501.58 g/t、铅回收率71.17%的铅精矿，锌品位53.11%、含铅0.95%、含银235.11 g/t、锌回收率93.45%的锌精矿。与现场指标相比，选矿工艺段数明显减少，同时铅精矿铅品位提高了12.11个百分点，铅金属回收率提高了12.46个百分点，并且赋存在铅精矿和锌精矿中银的金属回收率提高了61.97个百分点。

Mineral Processing Research on a Lead-Zinc Sulphide Ore in Sichuan

It is difficult to separate lead and zinc from the on-site process of a lead-zinc sulfide mine in Sichuan Province.The zinc content in lead concentrate is high，and the lead and silver recovery rate is low.In order to improve on-site sorting indicators，beneficiation process test was conducted based on the study of the properties of the lead-zinc sulfide ore.Chemical multielement analysis results showed that there is 1.03% Pb，6.28% Zn and 37.16 g/t Ag，main minerals of the ore are sphalerite and galena.The gangue minerals are mainly dolomite，calcite，and quartz. Beneficiation experiment results indicated via flotation process of one-roughing，three-cleaning and one-scavenging lead flotation in neutral environment and one-roughing，one-cleaning and one- scavenging zinc flotation in high alkali environment.Finally obtained lead concentrate of 57.45% Pb，6.09% Zn and 501.58g/t Ag，Pb recovery of 71.17%，and Zinc concentrate of 53.11% Zn，0.95% Pb and 235.11g/t Ag，Zn recovery of 93.45%.Compared with on-site production indicators，the number of beneficiation processes was significantly reduced，while the lead concentrate grade was increased by 12.11 percentage points，the lead metal recovery rate was increased by 12.46 percentage points，and the recovery of silver metal in lead concentrates and zinc concentrates was improved by 61.97 percentage points.