Abstract During copper (Cu) production, the concomitant arsenic (As) is generally dispersed into various As-bearing byproducts which need to be disposed separately. This work presents an integrated disposition method for the hazardous As by returning the As-bearing byproducts to the copper flash smelting process and solidifying As into smelting slag. After recovering the remnant Cu in smelting slag, the tailings slag become the only output of As in Cu production system. The statistics show that under this operation mode the As brought in and out of the copper production system can keep balance. Investigations reveal that the As species in copper slag include Cu-As intermetallics, Cu-As sulfides and the As incorporated in fayalite phase and glassy silicates matrix. The tailings slag produced from slag flotation process exhibits a leaching toxicity lower than the USEPA and SEPA regulatory thresholds. This work indicates the copper flash smelting process is promising for the efficient and safe disposition of As via recirculation processing of As-bearing byproducts.

中文翻译：

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通过在铜闪速熔炼工艺中加入熔炼渣来高效安全地处理砷

摘要 在铜（Cu）生产过程中，伴生的砷（As）通常分散成各种含As的副产物，需要单独处理。这项工作提出了一种有害砷的综合处置方法，将含砷的副产品返回到铜闪速熔炼过程中，并将砷固化成熔渣。尾矿渣回收冶炼渣中的残余铜后，成为铜生产系统中唯一的砷输出。统计表明，在这种运行方式下，进出铜生产系统的砷可以保持平衡。调查表明，铜渣中的 As 种类包括 Cu-As 金属间化合物、Cu-As 硫化物和结合在铁橄榄石相和玻璃状硅酸盐基体中的 As。矿渣浮选过程产生的尾矿渣的浸出毒性低于美国环保局和国家环保局的监管阈值。这项工作表明，铜闪速熔炼工艺有望通过含砷副产品的再循环处理来高效安全地处置砷。