某铅锌尾矿浓密机溢流的工艺矿物学分析

摘要

The valuable elements of a certain lead-zinc tailing thickener overflow have recyclable value. Process mineralogy research of this overflow was implemented using mineral automated quantitative mineralogy (MLA), and the chemical composition, mineral composition, the output form of main metal sulfide and the dissociation degree were investigated by traditional process mineralogy methods. Statistical results show that pyrite is the main metal mineral followed by galena and sphalerite, the mass fraction of pyrite is 46.30%, and most size of the three minerals is under 0.03 mm. The monomer dissociation degrees of pyrite, galena and sphalerite are 94.93%, 85.48% and 89.34%, respectively. The separation of high-grade sulfur concentrate is good due to the high pyrite content and dissociation degree of the sample. Based on the process mineralogy analysis, the desilting of the high-pressure hydrocyclone was mixed with the feed of original production as a new feed to produce high grade sulfur concentrate. The process can achieve larger benefit with few industrial transformation investments.%运用矿物参数自动分析和传统的工艺矿物学研究技术相结合的方式对某铅锌尾矿浓密机溢流进行了工艺矿物学研究，研究了该溢流的化学成分、矿物组成、主要金属硫化物的产出形式及解离度。分析结果表明：样品中金属矿物主要是黄铁矿(占溢流样品质量的46.30%)，其次为方铅矿和闪锌矿，3种主要矿物的粒度大多小于0.03 mm。MLA的统计结果表明：3种主要矿物呈单体产出的比例分别为黄铁矿94.93%、方铅矿85.48%和闪锌矿89.34%。黄铁矿含量高，解离程度好，预计通过分选可获得较高品位的硫精矿。基于上述工艺矿物学分析，推荐将浓密机溢流通过高压水力旋流器分级脱泥，旋流器沉砂与原回收高硫精矿的给矿混合进入原回收高硫精矿的生产流程，可实现在较低的工业改造投资条件下，获得较大的收益。