攀西某铜矿尾矿资源化利用研究

针对攀西某低品位尾矿进行了资源化利用技术研究。结果表明,针对含铜0.039%、含钴0.005 2％的尾矿矿样,采用“铜钴混合浮选-铜钴分离”工艺,可获得Cu品位13.38%、回收率21.19%的铜精矿和Co品位0.32%、回收率17.20%的硫钴精矿;对混合浮选后的尾矿采用“弱磁选-强磁选-重选”联合工艺,可获得TFe品位60.99%、回收率7.12%的铁精矿和K₂O品位8.67%、回收率30.68%的云母精矿;对选云母后的尾矿开展多功能矿物硅肥制备研究,可获得有效硅(以SiO₂计)含量38.75%的多功能矿物硅肥。该技术可实现攀西某铜矿尾矿减量56%以上。

Resource Utilization of Copper Tailings from Panzhihua-Xichang Region

The resource utilization technologies for low-grade tailings from Panzhihua-Xichang (Panxi) region are presented. A flowsheet consisting of Cu-Co bulk flotation and Cu-Co separation is adopted to process the tailings containing 0.039% Cu and 0.005 2% Co, resulting in the Cu-Co bulk concentrate grading 13.38% Cu and 0.32% Co with recoveries of 21.19% Cu and 17.20% Co. A flowsheet consisting of low intensity magnetic separation, high intensity magnetic separation and gravity separation is then used to beneficiate bulk flotation tailings, yielding an iron concentration grading 60.99% TFe at 7.12% recovery and a mica concentration grading 8.67% K₂O at 30.68% recovery. After the mica is separated out, the tailings is used to prepare silicon fertilizer, producing a multifunctional mineral silicon fertilizer with SiO₂ grade of 38.75%. It is concluded that with these measures, the copper tailings of Panxi region can be reduced by more than 56%.