利民矿务局铅锌选矿厂的职工,采用合理调整浮选矿浆浓度等措施,使铅、锌精矿品位分别提高了0.8%和1.0%,铅、锌选矿回收率分别提高到92～94%和88～90%。这个选矿厂的原矿,含 Pb4.5%,含 Zn6.5%,生产上采用两段磨浮流程。即:第一段粗磨后,浮选铅,其尾矿进行第二段细磨浮选锌。几年来,该厂对影响浮选浓度的因素不够重视。如:检修浮选泡沫 The staffs of the lead-zinc concentrator of Limin Mining Bureau increased the grade of lead and zinc concentrate by 0.8% and 1.0% respectively, and the recovery rates of lead and zinc beneficiation increased to 92-94 % And 88-90%. The ore dressing plant, containing Pb4.5%, containing 6.5% Zn, the production of two-stage grinding process. Namely: After the first rough grinding, flotation of lead, the tailings for the second fine grinding flotation of zinc. Over the years, the plant on the factors that affect the concentration of flotation not enough attention. Such as: maintenance flotation foam