某高硫铜硫矿石低碱度浮选试验研究

Study on Flotation Test for a High-sulfur Copper-sulfur Ore with Low Alkalinity

某铜硫矿富含黄铁矿和磁黄铁矿等硫铁矿物,占原矿矿物总量的38.413%,属于典型的高硫铜硫矿石。原铜硫生产工艺采用石灰用量大,铜生产指标不稳定。为了在较低碱度条件下提高该高硫铜硫矿石选矿指标,针对该矿石特点,研发了“铜硫等可浮—粗精矿再磨—铜硫分离”工艺和新型XC捕收剂,使铜粗选pH降至8以下。最终,采用石灰作铜调整剂、XC捕收剂作铜捕收剂、硫酸铜作硫调整剂、丁基黄药作硫捕收剂,在原矿磨矿细度为-0.074 mm占66%、粗精矿再磨细度为-0.045 mm占71%条件下,针对含Cu 0.92%、S 16.84%的原矿,闭路试验获得铜品位19.57%、铜回收率85.56%的铜精矿,硫品位42.02%、硫回收率45.58%的硫精矿1和硫品位37.10%、硫回收率29.96%的硫精矿2,为该矿山的选矿工艺优化提供了技术支持。

A high-sulfur copper-sulfur ore was rich in pyrite and pyrrhotite,accounting for 38.413%of the mineral content of the raw ore.The original copper sulfur beneficiation process used large amount of lime and the copper production index was unstable.In order to improve the beneficiation index of the high sulfur copper sulfide ore under the condition of low alkalinity,according to the characteristics of the ore,the"copper sulfide floatable,regrinding of coarse concentrate and copper sulfide separation"process and XC collector were developed,by which the pH value of copper roughing was reduced to 8.Finally,lime as copper regulator,XC collector as copper collector,CuSO4 as sulfur regulator,butyl xanthate as sulfur collector,under the conditions of raw ore grinding fineness of-0.074 mm accounting for 66%,coarse concentrate regrinding fineness of-0.045 mm accounting for 71%,while the raw ore assayed Cu 0.92%and S 16.84%,the copper concentrate assaying Cu 19.57%with the recovery of 85.56%and the sulfur concentrate 1 assaying S 42.02%with the S recovery of 45.58%and the sulfur concentrate 2 assaying S 37.10%with the S recovery of 29.96%,were obtained in closed-circuit test.It provides technical support for optimizing the beneficiation process of the mine.