Pyrite cinder (PyC) is an iron-enriched solid waste material, which is an important iron resource for steel industry. However, the separation or extraction of iron minerals and heavy metals from PyC was ineffective, because of the fine disseminated granularity and the intergrowth between iron minerals and toxic heavy metals during high temperature roasting. In this paper, a novel method to extract copper and iron from the PyC by reduction roasting-leaching-magnetic separation was proposed. The effect of various parameters on the copper leaching behavior were studied, and the corresponding kinetics model was established. Under the optimized leaching conditions, the maximum copper leaching recovery of 82.18% was reached. A high-quality iron concentrate with Fe content of 65.58% and copper content of 0.17% was obtained subsequently from the leaching residuals through magnetic separation. It showed that the leaching process was controlled by mixed diffusion and chemical reaction, with a corresponding activation energy of 27.97 kJ/mol. The free copper oxide, combined copper oxide and secondary copper sulfide were extracted completely in H₂SO₄ solution. However, chalcopyrite as a form of primary copper sulfide dissolved partly. The leaching mechanism was confirmed by chemical phase and XPS analysis.

黄铁矿渣（PyC）是一种富含铁的固体废弃物，是钢铁工业的重要铁资源。然而，PyC 中铁矿物和重金属的分离或提取是无效的，因为在高温焙烧过程中铁矿物和有毒重金属之间的细小弥散粒度和共生。本文提出了一种通过还原焙烧-浸出-磁选从PyC中提取铜和铁的新方法。研究了各种参数对铜浸出行为的影响，并建立了相应的动力学模型。在优化的浸出条件下，铜浸出率最高可达82.18%。Fe含量为65.58%，铜含量为0的优质铁精矿。随后通过磁选从浸出残渣中获得17%。表明浸出过程受混合扩散和化学反应控制，相应的活化能为27.97 kJ/mol。游离氧化铜、结合氧化铜和二次硫化铜在H中被完全萃取₂ SO ₄溶液。然而，作为初级硫化铜形式的黄铜矿部分溶解。浸出机理通过化学相和 XPS 分析得到证实。