贵州某磷尾矿再选试验研究

Reconceutration Study on the Tailings of Phosphorite in Guizhou

贵州某磷矿石浮选尾矿中主要矿物为白云石,其次为氟磷灰石。采用自制的高效捕收剂AB和1段磨矿、1粗1精氟磷灰石反浮选工艺对该尾矿进行分离白云石与氟磷灰石的再选试验,在磨矿细度为-75μm占62.50%,抑制剂磷酸用量为14 kg/t,AB用量粗选为300 g/t、精选为100 g/t的条件下,获得了P2O5品位为22.29%、P2O5回收率为56.72%、MgO含量为4.23%的磷精矿和MgO品位为19.97%、MgO回收率为93.38%、P2O5含量为5.68%的镁精矿,为该尾矿的综合利用提供了一条经济可行的途径。

According to the characteristics of the flotation tailings of phosphorite in Guizhou in which the main mineral is dolomite and fluorine apatite, reseparation research between dolomite and fluorine was done by the reverse flotation of one roughing and one cleaning after grinding. The results show that at these optimal conditions which are ： 62. 50% -75 um grinding size, 14 kg/t phosphoric aid as inhibitor, 300 g/t AB as collector for roughing and 100 g/t for cleaning. The phosphorous concentrate with a content of P2O5 for 22. 29%, MgO for 4. 23% and recovery of P205 for 56. 72%, and the magnesium concentrate with a content of P2O5 for 5.68%, MgO for 19. 97% and recovery of MgO for 93.38% can be obtained. It provides an economic and feasible way for comprehensive utilization of the tailings.