从安徽某磁铁矿磁选尾矿中选铜的试验研究

安徽某磁铁矿磁选尾矿含铜、硫，但铜品位低，且铜矿物嵌布粒度细，含泥量高，以常用浮选药剂按常规铜硫混浮-铜硫分离、中矿顺序返回流程进行选矿试验，铜精矿铜品位仅为15.62%、回收率仅为75.38%。为此，采用自行研制的新型酯类硫化矿捕收剂PL411，并按中矿选择性磨浮大闭路循环新工艺进行选矿试验，最终获得铜品位为22.13%、铜回收率为81.88%的铜精矿和硫品位为46.58%、硫回收率为78.47% 的硫精矿。该试验结果为安徽某磁铁矿尾矿的二次开发奠定了基础，同时对其它类似磁铁矿尾矿的综合利用具有一定的借鉴和参考价值。

Test Research on Copper Separation from Tailing of Magnetic Separation of An Anhui Magnetite Ore

The tailing from the magnetic separation of an Anhui magnetite ore contains copper and sulfur, which is characterized by low copper grade, fine dissemination copper mineral and high slime content. When it is treated by conventional flotation reagents and flowsheet that consists of copper-sulfur bulk flotation, copper separation from sulfur and middling recirculation in sequence, the obtained copper concentrate will have a grade on only 15.62% and a recovery of only 75.38%. Therefore, self-developed ester type sulfide ore collector PL411 is used in the industrial test with a new process of middling selective grinding-flotation closed circuit, finally obtaining a copper concentrate having a grade and recovery of 22.13% and 81.88% respectively and a sulfur concentrate having a grade and recovery of 46.58% and 78.47% respectively. The test results have laid a foundation for the secondary exploitation of the tailing of an Anhui magnetite ore and will also have some reference to the comprehensive utilization of other similar magnetite ores.