艾砂磨机在黑龙江某铜矿选厂的应用试验

黑龙江某铜矿石铜品位为0.38%,伴生有金、银、钼等有价金属元素。原工艺在入选细度为-74μm占66%的情况下,浮选得到的铜精矿Cu品位为18.97%、SiO2含量为25%、Al2O3含量为6.25%,铜精矿中Si、Al含量超标,影响出售计价系数。为提高铜精矿品质,降低杂质含量,进行了艾砂磨机实验室小试及工业试验研究,结果表明:在相同工艺流程和浮选药剂制度条件下,艾砂磨机应用于铜粗精矿再磨后,小型闭路试验可获得Cu品位为30.68%、SiO2含量为10.24%、Al2O3含量为1.96%的铜精矿;工业试验在粗精矿再磨细度P80=25μm时,可获得Cu品位为27.63%、SiO2含量为10.34%、Al2O3含量为1.87%的铜精矿。艾砂磨机的应用有效提高了铜精矿质量,降低了精矿运输成本,增加了产品附加值,经济效益显著。

Application Experiment of ALC Mill in a Copper Mine in Heilongjiang Province

The Cu grade of a certain copper mine in Heilongjiang Province is 0.38%， associated by valuable metals such as gold， silver and molybdenum. In the case of the original processing grinding fineness is -74 μm accounted for 66%， via the flotation process， copper concentrates containing 18.97% Cu， 25% SiO₂ and 6.25% Al₂O₃， the content of Si and Al in the copper concentrate exceeded the standard and affecting the sale price coefficient. In order to improve the quality of copper concentrates and reduce the content of impurities， laboratory tests and industrial tests of ALC mill were carried out. The results show that under the conditions of the same process and flotation agent system， after the ALC mill is applied to regrind of copper rough concentrate， by small closed circuit experiment can obtain copper concentrates containing 30.68% Cu， 10.24% SiO₂， and 1.96% Al₂O₃. In the industrial test， when the regrinding fineness P80 was 25 μm of rough concentrate， copper concentrate containing 27.63% Cu， 10.34% SiO₂， and 1.87% Al₂O₃. The application of ALC mill has effectively improved the quality of copper concentrates， reduced the transportation cost of concentrates， increased the added value of products， and significantly increased economic benefits.