江西某低品位次生蓝辉铜矿石选矿试验

江西某蓝辉铜矿石铜品位为0.30%，原生硫化铜仅占总铜的6.67%，次生硫化铜占总铜的80.00%，主要铜矿物蓝辉铜矿多以不规则粒状集合体形式充填在脉石或黄铁矿粒间，大部分易与黄铁矿解离，细粒蓝辉铜矿与黄铁矿不易单体解离。为高效回收该铜矿资源，进行了选矿试验研究。结果表明，矿石在磨矿细度为-200目占70%的情况下，采用1粗2精1扫铜硫混浮、混浮精矿1粗2精1扫铜硫分离、铜硫分离精选1尾矿和扫选精矿合并再磨至-325目占85%后再返回，其余中矿直接顺序返回流程处理，最终可获得铜品位为20.29%、含硫42.97%、铜回收率为71.02%的铜精矿，以及硫品位为37.42%、含铜0.28%、硫回收率为80.04%的硫精矿，较好地实现了铜和硫的回收。

Beneficiation Tests on a Low-grade Secondary Digenite Ore from Jiangxi

A digenite ore from Jiangxi contains only 0.30% copper.Primary copper sulfide accounts for only 6.67% of the total copper，while secondary copper sulfide content is 80.00%.Digenite mainly exists among gangue or pyrite grains in shape of irregular granular aggregate.Liberation from pyrite is easy for most of digenite ores except the fine digenite.For the efficient recovery of the ore resources，beneficiation tests were conducted.The results showed that:at the grinding fineness of 70% passing 200 mesh，through the process of one roughing-two cleaning and one scavenging Cu-S bulk flotation，one roughing-two cleaning-one scavenging separation flotation between pyrite and copper sulfide for Cu-S mixed concentrate，middlings returned in order (tailings of the first cleaning and concentrates of the scavenging mixed，and reground to 85% passing 325 mesh and then returning)，copper concentrate with 20.29% Cu，42.97% S，and copper recovery of 71.02%，sulphur concentrate with 0.28% Cu，37.42% S，and sulphur recovery of 80.04% is obtained separately.Good recovery of copper and sulfur was achieved.