高海拔地区复杂铜铅锌多金属硫化矿浮选试验研究及应用

STUDY ON FLOTATION EXPERIMENT OF COMPLEX COPPER-LEAD-ZINC POLYMETALLIC SULPHIDE ORE IN HIGH ALTITUDE AREA AND ITS INDUSTRIAL

试验研究的矿样来自西藏墨竹工卡的复杂难选铜铅锌多金属矿。依据矿石性质,铜铅锌浮选采用铜铅混合浮选、再铜铅分离、铜铅浮选尾矿浮锌的原则工艺流程。该工艺的关键技术是:(1)铜铅混合浮选并采用中矿再磨措施,提高铜铅单体解离度。(2)铜铅分离采用活性炭脱药;(3)CMC、Na2SO3和Na2SiO3环保型的组合药剂作为铅矿物的抑制剂。通过上述技术创新,成功地实现了铜铅分离,并取得良好的选矿试验指标。该工艺率先在西藏两家选矿厂成功地应用。

Processing complex copper-lead-zinc multi-metallic sulphide ore has been recognized as one of the technical difficulties in ore dressing field. The mine samples for this experimental study which were from Mozhugongka in Tibet, are typical complex lead-zinc copper multi-metallic sulphide ore which are difficult to process. Based on the characteristics of the ore, we identify the flotation tests of copper, lead and zinc as a mixed Cu-Pb flotation, and then separate copper and lead, finally float zinc from the copper and lead tailings. The key technology of the process is as follows： （1） Regrinding the middlings, which can highly liberate copper and lead from the mixed Cu-Pb ore, thus increase copper and lead recovery. （2） Using activated carbon to absorb the collectors which was used in Cu-Pb separation processing. （3） Adapting the combination of CMC, Na2SO3 and Na2SiO3 which were environment-friendly as the depressant of galena instead of toxic sodium dichromate. Through this technology, the difficult technical problem of copper and lead separation had been successfully solved and a refined beneficiation test indicator had been obtained. This process first got its success application in tow concentrators in Tibet. At present, these two concentrators are running well and have a choiceness beneficiation test indicator.