我矿是一个含有铜、铅、锌、硫等多种金属硫化矿的小型矿床。现采用优先浮铜,混合浮选锌硫再分离的浮选流程,回收铜、锌、硫三种元素。铅因原矿含量太低未回收,随着井下深部开采,原矿中的铅含量明显上升,造成锌精矿含铅超标(2％以上),个别班超过4％,影响锌的冶炼。按照用户要求,必须把锌精矿含铅降到2％以下。问题提出后,我们根据几种有用矿物的可浮性的差异,硫氮九号对黄铜矿、方铅矿有较强的选择 Mine is a mine containing copper, lead, zinc, sulfur and other metal sulfide ore of small deposits. Are the preferred floating copper, mixed flotation separation of zinc and flotation flotation process, recovery of copper, zinc, sulfur three kinds of elements. Lead is not recovered due to too low original ore content. With the deep underground mining, the lead content in the ore is obviously increased, resulting in excessive lead (over 2%) in the zinc concentrate and more than 4% in the individual class, affecting the smelting of zinc. In accordance with user requirements, the lead content of zinc concentrate must be reduced below 2%. After the question was put forward, based on the difference in floatability of several useful minerals, Sulfur Nitrogen No. 9 has a strong choice for chalcopyrite and galena