Substantial quantities of openly dumped slag contribute to the absence of recovery and utilization of valuable metals as well as potential environmental pollution to water and soil. Owing to the excessively high arsenic content present in iron extracted from copper smelting slag, we propose a new arsenic removal process in this paper. The results indicate that arsenic sulfides in copper smelting slag can be significantly removed at 1100 °C in an N₂ atmosphere, leading to a 0.15% residual arsenic content. Furthermore, undecomposed arsenate in the slag can be reduced in an N₂–CO atmosphere. During a coal-based direct reduction process, under optimal conditions, the removal efficiency of arsenic is relatively low. Subsequently, under optimal conditions, the arsenic content drops significantly from 0.18 to 0.080%. This new removal process engenders lower arsenic content in iron extracted from slag than the standards of pig iron and direct reduced iron in steelmaking.

大量露天排渣导致缺乏有价值的金属的回收和利用以及对水和土壤的潜在环境污染。由于从铜冶炼渣中提取的铁中砷含量过高，我们提出了一种新的除砷工艺。结果表明，在1100°C的N ₂气氛中，铜熔渣中的硫化砷可​​以被显着去除，残留砷含量为0.15％。此外，可以减少N _2中炉渣中未分解的砷酸盐。–CO气氛。在基于煤的直接还原过程中，在最佳条件下，砷的去除效率相对较低。随后，在最佳条件下，砷含量从0.18％显着下降至0.080％。这种新的去除方法使从炉渣中提取的铁中的砷含量低于生铁的标准，并在炼钢中直接还原了铁。