某高氧化率铅锌矿选矿试验研究

Experimental Study on Beneficiation of a Lead-zinc Ore with High Oxidation Rate

针对某铅锌矿石嵌布粒度微细、共生关系复杂、氧化率高的性质特点,开展了系统的选矿试验研究。确定采用铅锌依次优先浮选的原则流程,并通过条件试验制定了适宜的药剂制度。结果表明:①铅浮选作业添加Na2S可有效活化部分白铅矿,提高铅回收率;采用XDT-22配合硫酸锌能有效抑制锌矿物的上浮,降低铅精矿中锌的含量;以XCT-11作为辅助捕收剂,可进一步提高铅回收率。②锌浮选作业采用组合捕收剂XCT-11能强化对锌矿物的捕收,提高锌回收率。③在磨矿细度-74μm占75%的条件下,闭路试验可获得铅品位47.85%、铅回收率68.31%的铅精矿和锌品位45.86%、锌回收率82.81%的锌精矿,指标较为优异。

Aimng at the characteristics of fine particle size,complex symbiosis and high oxidation rate of a lead-zinc ore,a systematic beneficiation experiment was carried out.The principle flow of lead and zinc sequence flotation was determined and the suitable reagent system was established through condition test.The results showed that:①Part of cerussite could be effectively activated with the addition of Na2S in the lead flotation and lead recovery rate improved in consequence.XDT-22 combined with zinc sulfate could effectively inhibit zinc mineral floating and reduce zinc contents in the lead concentrate.XCT-11 as an auxiliary collector could further improve the lead recovery rate.②The combined collector XCT-11 could strengthen the collection of zinc minerals and improve the zinc recovery rate in the zinc flotation.③Under the grinding fineness of-74μm accounting for 75%,lead concentrate with lead grade of 47.85%and lead recovery rate of 68.31%and zinc concentrate with zinc grade of 45.86%and zinc recovery rate of 82.81%were obtained respectively in the closed-circuit test,indicating the better indexes.