The use of low grade, high impurity copper concentrate has made the copper smelting process increasingly complex. As the composition of copper slag changes, controlling slag characteristics is essential to maintain process efficiency and improve slag matte separation. Al₂O₃ is one of the major gangue elements in the copper smelting process and has an important impact on the physicochemical properties of copper slag. However, the effect of high Al₂O₃ content on copper smelting has been less studied. In this study, the effect of different Al₂O₃ contents on the phase and structure of copper slag and the modification of high-alumina copper slag by adjusting the Fe/SiO₂ ratio and CaO addition were investigated by using chalcopyrite concentrate as raw material. The results showed that the increase in Al₂O₃ content promoted the formation of spinel and complicated the slag structure. Increasing the Fe/SiO₂ ratio and CaO addition can simplify the slag structure but increase the production of high melting point phases. Reasonable proportion of Fe/SiO₂ ratio and CaO addition can effectively reduce the loss of copper in high-alumina copper slag. The results of the study provide a theoretical basis for selecting reasonable process parameters for the smelting of high-alumina copper concentrates and recovering secondary resources containing Al₂O₃.

低品位、高杂质铜精矿的使用，使得铜冶炼工艺日益复杂。随着铜渣成分的变化，控制炉渣特性对于保持工艺效率和改善炉渣冰铜分离至关重要。Al ₂ O ₃是铜冶炼过程中的主要脉石元素之一，对铜渣的理化性质具有重要影响。但高Al ₂ O ₃含量对铜冶炼的影响研究较少。本研究以黄铜矿精矿为原料，研究了不同Al ₂ O ₃含量对铜渣物相和结构的影响，并通过调节Fe/SiO ₂比和CaO添加量对高铝铜渣进行改性。 。结果表明，Al ₂ O ₃含量的增加促进了尖晶石的形成，使炉渣结构复杂化。提高Fe/SiO ₂比和CaO添加量可以简化炉渣结构，但增加高熔点相的产生。合理的Fe/SiO ₂比和CaO添加量可有效降低高铝铜渣中铜的损失。研究结果为高铝铜精矿冶炼选择合理的工艺参数及回收含Al ₂ O ₃的二次资源提供了理论依据。