某高硫铅锌矿选矿生产工艺流程考查及改进措施研究

Study on the Investigation and Optimization of Processing Flowsheet for a High Sulfur-lead-zinc Ore

为挖掘某高硫铅锌矿选矿生产技术指标提升的方向及潜力,对入选原矿进行了化学成分、矿物组成、嵌布特征等矿石性质研究,测定了精矿产品及尾矿中主要目的矿物的单体解离度和粒度分布等。结果表明,矿石中目的矿物方铅矿、闪锌矿及黄铁矿的嵌布粒度粗细不均匀,且共生关系密切、包裹关系复杂,属于难解离矿石;精矿互含高是导致精矿质量不高及金属回收率低的主要因素,方铅矿损失的主要原因是单体解离不充分,闪锌矿损失的主要原因除单体解离不充分外,还受到浮选分离工艺的严重影响。并在此基础上,针对性地提出了降低选矿处理量、强化细磨分级、优化药剂制度、合理调整矿浆浓度等改进措施及建议,为提升选矿技术指标提供了技术参考。

In order to explore the direction and potential of improving the index of a high sulfur-lead-zinc ore concentration plant,the chemical and mineralogical composition as well as the dissemination characteristics were studied.Besides,the free fractional degree and the particle size distribution of primary target minerals in the concentrates and tailings were measured.The results showed that the dissemination size of the target mineral galena,sphalerite and pyrite in the ore was not uniform,and the symbiotic relationship was close and the package relationship was complex.Therefore,the ore belonged to an ore that was difficult to dissociate.That the concentrate contained other two sulfide minerals results in the low quality and recovery.The main reason for low recovery of galena and sphalerite was the low free fractional degree.Besides,recovering sphalerite was seriously affected by the flotation process.On this basis,some improvement measures and suggestions were put forward,such as reducing ore processing capacity,strengthening fine grinding and classification,optimizing reagent system,rationally adjusting pulp concentration,etc.,which provided technical reference for improving ore dressing indexes.