As the most abundant copper containing resource and zinc containing resource, chalcopyrite and sphalerite/marmatite commonly coexist as Cu-Zn mixed ores in deposits. However, it is difficult to completely separate sphalerite and chalcopyrite by flotation, thus resulting in the existence of zinc impurity in copper concentrate. Sphalerite/marmatite existed in copper sulfide concentrate as impurity may lead to severe damage of the smelting equipment, and cause the waste of copper and Zn resources, it will also decrease of the sale price of copper concentrates. Therefore, the deep separation of zinc from zinc bearing copper sulfide concentrate is of great significance. In this work, selective chemical leaching was developed to efficiently remove zinc from zinc containing copper sulfide concentrate. Under the optimal condition (i.e., sulfuric acid concentration exceed 100 g/L, temperature of 80 °C, pulp density of 10%, leaching time of 48 h), over 85% Zn was extracted into the leaching solution together with only about 10% Cu and Fe, according to the leaching experiment. Leaching slurry had good solid-liquid separation characteristics, and zinc can be further effectively recovered from the leaching solution. According to X-ray diffraction (XRD) and scanning electron microscope/energy dispersive spectrometer (SEM/EDS) analysis, chalcopyrite was the main mineralogical phase in the residues, which can be regarded as high quality copper concentrate for metallurgy. Accordingly, a new process for deep and efficient separation of Cu-Zn mixed ores has been proposed.

黄铜矿和闪锌矿/铁闪锌矿作为最丰富的含铜资源和含锌资源，在矿床中普遍以铜锌混合矿的形式共存。但浮选很难将闪锌矿和黄铜矿完全分离，导致铜精矿中存在锌杂质。硫化铜精矿中含有闪锌矿/铁闪锌矿作为杂质，会导致冶炼设备严重损坏，造成铜、锌资源的浪费，也会降低铜精矿的销售价格。因此，从含锌硫化铜精矿中深度分离锌具有重要意义。在这项工作中，开发了选择性化学浸出以有效地从含锌硫化铜精矿中去除锌。在最佳条件下（即 硫酸浓度超过 100 g/L，温度为 80 °C，矿浆密度为 10%，浸出时间为 48 h)，超过 85% 的 Zn 与仅约 10% 的 Cu 和 Fe 一起被提取到浸出液中，根据浸出实验。浸出液具有良好的固液分离特性，可进一步有效地从浸出液中回收锌。根据X射线衍射（XRD）和扫描电子显微镜/能谱仪（SEM/EDS）分析，黄铜矿是残渣中的主要矿物相，可认为是优质的冶金铜精矿。因此，提出了一种深度高效分离铜锌混矿的新工艺。根据浸出实验，超过 85% 的 Zn 与仅约 10% 的 Cu 和 Fe 一起被提取到浸出液中。浸出液具有良好的固液分离特性，可进一步有效地从浸出液中回收锌。根据X射线衍射（XRD）和扫描电子显微镜/能谱仪（SEM/EDS）分析，黄铜矿是残渣中的主要矿物相，可认为是优质的冶金铜精矿。因此，提出了一种深度高效分离铜锌混矿的新工艺。根据浸出实验，超过 85% 的 Zn 与仅约 10% 的 Cu 和 Fe 一起被提取到浸出液中。浸出液具有良好的固液分离特性，可进一步有效地从浸出液中回收锌。根据X射线衍射（XRD）和扫描电子显微镜/能谱仪（SEM/EDS）分析，黄铜矿是残渣中的主要矿物相，可认为是优质的冶金铜精矿。因此，提出了一种深度高效分离铜锌混矿的新工艺。可以进一步有效地从浸出液中回收锌。根据X射线衍射（XRD）和扫描电子显微镜/能谱仪（SEM/EDS）分析，黄铜矿是残渣中的主要矿物相，可认为是优质的冶金铜精矿。因此，提出了一种深度高效分离铜锌混矿的新工艺。可以进一步有效地从浸出液中回收锌。根据X射线衍射（XRD）和扫描电子显微镜/能谱仪（SEM/EDS）分析，黄铜矿是残渣中的主要矿物相，可认为是优质的冶金铜精矿。因此，提出了一种深度高效分离铜锌混矿的新工艺。