用新型螯合捕收剂分选云南某氧化铅锌矿石

Application of a New Chelating-Agent Collector On Benficiation of a Lead-zinc Oxide Ore in Yunnan

云南某高铅、高锌、高银氧化铅锌矿主要成分为异极矿和白铅矿,其含量分别为58.31%和22.79%,且银含量高达352.90 g/t。为了解决冶炼前的铅锌互含问题,以昆明冶金研究院研制的新型螯合捕收剂C6403为白铅矿浮选捕收剂,进行了异极矿和白铅矿的高效分离试验。结果表明,采用3粗2精、中矿顺序返回的闭路流程处理该矿石,获得的铅精矿铅品位为42.04%、含锌9.63%、含银668.15 g/t、铅回收率为83.22%、银回收率为66.23%,获得的锌精矿锌品位为43.51%、含铅4.56%、含银183.30 g/t、锌回收率为89.36%、银回收率为33.77%,铅精矿、锌精矿的质量均达到了冶炼要求。

With high lead, zinc and silver content reaching 58.31%, 22.79% and 352. 90 g/t,respectively, the oxidized lead zinc ore in Yunnan is mainly constituted by hemimorphite and cerussite. In order to resolve problems brought by mixed lead and zinc during metallurgical process of this ore, froth floatation experiments have been performed to separate hemimor- phite and cerussite in it and a new chelating-agent collector named C6403 has been employed in the experiments to improve floatation index. As the results show, a lead concentrate with lead grade of 42.04%, zinc grade of 9.63%, silver grade of 668.15 g/t, lead recovery of 83.22% and silver recovery of 66.23%, and a zinc concentrate with zinc grade of 43.51%, lead grade of 4.56%, silver grade of 183.30 g/t,zinc recovery of 89.36% and silver recovery of 33.77% were obtained by adop- ting the closed circuit process of three roughing, two cleaning, and middles back to the flow-sheet. Ultimately, both lead concen- trate and zinc concentrate ean meet requirements of smelting plants.