国外某低品位铜锌硫化矿浮选分离试验研究

国外某低品位铜锌硫化矿矿床属于矽卡岩型，为确定该矿石中有价金属开发利用的可行性，进行了选矿试验。研究表明，矿石中铜品位为0.38%，锌品位为1.26%，针对矿样组成特性，确定了优先浮选铜， 选铜后的尾矿再浮选锌的工艺流程处理该硫化矿矿石。在磨矿细度为-0.074 mm占74.60%的条件下，选用石灰为矿浆pH调整剂，硫酸锌和亚硫酸钠为组合抑制剂，Z-200为捕收剂优先浮选硫化铜矿物；对选铜尾矿继续 采用石灰调节矿浆pH值，硫酸铜活化被抑制的锌矿物，丁基黄药为捕收剂浮选硫化锌矿物的药剂方案，经“2粗2精”选铜、“1粗3精2扫”选锌的闭路试验，最终获得铜精矿铜品位和回收率分别为22.55%、85.19%和锌 精矿锌品位和回收率分别为44.83%、74.36%，有效地实现了铜锌硫化矿的分离与回收，为国外该类型硫化矿矿石的开发利用提供依据。

Experimental Study on Flotation of a Low-grade Copper-zinc Sulphide Ore in Abroad

A low grade overseas copper-zinc sulfide ores belong to skarn type. In order to determine the feasibility of the development and utilization of valuable metals in the ore， the dressing experiment was carried out. The reasearch showed that the copper and zinc grade in the ore is 0.38% and 1.26%， respectively. According to the composition properties of the ore sample， the process was established to select the copper minerals first， and then the zinc minerals. In the condition of grinding fineness of -0.074 mm accounting for 74.60%， copper sulfide precedence flotation was conducted using lime as the pulp pH regulators， zinc sulfate and sodium sulfite as mixed depressant and Z-200 as collector. Then， zinc minerals were floated from the copper flotation tailings using lime as pH adjustor， copper sulfate as activator and butyl xanthate as collector. By the closed-circuit flotation test of "two roughing and two cleaning" for copper， “one roughing， three cleaning and two scavenging” for zinc， the Cu grade and recovery rate was 22.55% and 85.19%， respectively in copper concentrate， and Zn grade and recovery rate was 44.83% and 74.36%， respectively in zinc concentrate， which achieved the separation and recovery of copper and zinc sulphide minerals effectively and provided a reference for the development and utilization of overseas sulphide ore.