Sulfide copper mineral, typically Chalcopyrite (CuFeS₂), is one of the most common minerals for producing metallic copper via the pyrometallurgical process. Generally, flotation tailings are produced as a byproduct of flotation and still consist of un‒recovered copper. In addition, it is expected that more tailings will be produced in the coming years due to the increased exploration of low‒grade copper ores. Therefore, this research aims to develop a copper recovery process from flotation tailings using high‒pressure leaching (HPL) followed by solvent extraction. Over 94.4% copper was dissolved from the sample (CuFeS₂ as main copper mineral) by HPL in a H₂O media in the presence of pyrite, whereas the iron was co‒dissolved with copper according to an equation given as C_Cu = 38.40 × C_Fe. To avoid co‒dissolved iron giving a negative effect on the subsequent process of electrowinning, solvent extraction was conducted on the pregnant leach solution for improving copper concentration. The result showed that 91.3% copper was recovered in a stripped solution and 98.6% iron was removed under the optimal extraction conditions. As a result, 86.2% of copper was recovered from the concentrate of flotation tailings by a proposed HPL‒solvent extraction process.

硫化铜矿物，通常是黄铜矿（CuFeS ₂），是通过火法冶金工艺生产金属铜的最常见矿物之一。通常，浮选尾矿是浮选的副产品，仍由未回收的铜组成。此外，由于对低品位铜矿的勘探不断增加，预计未来几年将产生更多的尾矿。因此，本研究旨在开发一种利用高压浸出（HPL）从浮选尾矿中提取铜，然后进行溶剂萃取的方法。在H _2中通过HPL从样品（CuFeS ₂作为主要铜矿物）中溶解了94.4％以上的铜O介质存在黄铁矿，而铁与铜根据C _Cu = 38.40× C _Fe的方程式共溶解。为避免共溶解的铁对随后的电解沉积工艺产生负面影响，对浸出液进行了溶剂萃取以提高铜的浓度。结果表明，在最佳萃取条件下，在汽提溶液中回收了91.3％的铜，并去除了98.6％的铁。结果，通过拟议的HPL‒溶剂萃取工艺从浮选尾矿精矿中回收了86.2％的铜。