X-射线分选机在大井子铜锌矿山的应用

采用X-射线分选机对大井子铜锌矿石进行不同粒级的X射线预选试验，结果表明：当阈值选取0.09时，30~200 mm粒级采用预选工艺后可获得铜、锌品位分别为0.90%和0.73%，铜、锌回收率分别为99.46%和98.80%的预选精矿，抛尾率为18.09%。30~200 mm粒级与筛分后-30 mm合并为精矿，较原矿铜、锌品位分别提高了0.16和0.13个百分点。对预选尾矿分析表明：预选尾矿铜品位为0.028%，锌品位为0.036%，铜、锌品位非常低；SiO2含量为63.13%，Al₂O₃含量为14.48%，TFe含量为7.32%，少量的CaO、MgO和K，说明尾矿主要成分为脉石矿物。对预选后精矿进行SEM和EDS检测表明：预选精矿主要以石英、绿泥石等脉石矿物为主，矿物组成粒度极不均，矿物之间的嵌布关系较复杂。对大井子铜锌矿石进行X-射线分选机预选后，可以提高入选矿石的品位，减少入选的废石量，提高选厂的综合效益。

Application of X-ray Sorting Machine in Dajingzi Copper-Zinc Ore

The X-ray pre-concentration test of Dajingzi copper-zinc ore by X-ray sorting machine was carried out. The results showed that when the threshold value was 0.09， the copper and zinc grades of the concentrate were obtained after the pre-selection process is 0.90% and 0.73%， the recovery rates of copper and zinc were 99.46% and 98.80%， respectively， and the tailing rate was 18.09%. Compared with the original ore， the copper and zinc grade in concentrate increased by 0.16 and 0.13 percentage points， respectively. The analysis on tailings properties indicate that the copper grade in tailings is 0.028%， the zinc grade is 0.036%， the copper and zinc grades are very low， SiO2 content is 63.13%， Al₂O₃ content is 14.48%， and TFe content is 7.32%， a small amount of CaO， MgO and K， which indicate that the main component of the tailings is gangue minerals. SEM and EDS tests on the pre-concentrate concentrate show that the pre-concentrate concentrate mainly consist of gangue minerals such as quartz and chlorite. Mainly， the mineral composition particle size is extremely uneven， and the intercalation relationship between minerals is more complicated. After pre-concentration the X-ray sorting machine for Dajingzi copper-zinc ore， the grade of the selected ore can be improved， the amount of waste rock selected can be reduced， and the comprehensive benefit of the plant can be improved.