某铜铅锌多金属硫化矿电位调控浮选试验研究

某铜铅锌多金属硫化矿铜铅矿物嵌布粒度微细，分离难度大，锌矿物以铁闪锌矿为主，现场仅生产铅精矿和锌精矿且选别指标差。为此，针对矿石性质，采用铜铅混浮-铜铅分离-混浮尾矿抑硫浮锌电位调控浮选工艺，通过控制矿浆电位，混浮粗精矿再磨，选择高效捕收剂、活化剂、抑制剂等措施，使铜铅矿物与锌硫矿物、铜矿物与铅矿物、铁闪锌矿与磁黄铁矿得到了较好的分选。闭路试验获得含铜18．13％、铜回收率55．41％的铜精矿，含铅50．20％、铅回收率83．29％的铅精矿和含锌49．75％、锌回收率86．17％的锌精矿，与现场相比，不仅回收了铜矿物，而且铅、锌精矿质量与回收率都得到了大幅度提高。

Experiment Study on Potential Controlled Flotation for Cu-Pb-Zn Multi-Metal Sulfide Ore

A Cu-Pb-Zn complex multi-metal sulfide ore whose main zinc mineral is marmatite has a micro-fine dissemination particle size and thus is difficult to separate, from which only lead concentrate and zinc concentrate are produced now with poor metallurgical performances. In view of this and in light of the ore properties, a potential-controlled flotation process consisting of copper-lead mineral bulk flotation-separation of copper and lead minerals-flotation of the bulk flotation tailing involving zinc flotation and sulfur depression was adopted. By taking the measures of pulp potential control, regrinding of the rougher concentrate of bulk flotation and selection of high efficiency collectors, activators and depressors, good separation of copper-lead minerals from zinc-sulfur minerals, copper mineral from lead mineral and marmatite from Pyrrhotite was achieved. The closed-circuit tests obtained a copper concentrate having a copper content of 18.13% and recovery of 55.41%, a lead concentrate having a lead content of 50.20% and recovery of 83.29% and a zinc concentrate having a zinc content of 49.75% and recovery of 86.17%. Compared to the present practice, not only the copper minerals Can be recovered, but also the quality and the recovery of both lead concentrate and zinc concentrate can be greatly improved.