The hydrometallurgical residue generated during the hydrometallurgical processing of waste automotive catalysts is valuable as a secondary resource. In this study, a process of platinum recovery from the hydrometallurgical residue by high-temperature smelting process was proposed. Results of lab- and pilot-scale experiments show a high recovery of more than 98% of platinum and glass slag was successfully obtained by controlling the Fe 3 O 4 addition, C/Fe 3 O 4 mass ratio, CaO/SiO 2 mass ratio, smelting temperature, and holding time at 15 wt%, 0.4, 0.6, 1500 °C, and 120 or 60 min, respectively. Results from the pilot-scale show that the platinum contents in the glass slag and alloys were less than 4 g/t and more than 0.6 wt%, respectively. Therefore, the process proposed in this study is a prospective and effective approach for reutilization of hydrometallurgical residue containing platinum.

中文翻译：

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高温冶炼法从废旧汽车催化剂湿法冶金渣中回收铂

在废汽车催化剂的湿法冶金加工过程中产生的湿法冶金残渣作为一种宝贵的二次资源。本研究提出了一种利用高温冶炼从湿法冶金渣中回收铂的工艺。实验室和中试实验结果表明，通过控制 Fe 3 O 4 添加量、C/Fe 3 O 4 质量比、CaO/SiO 2 质量比，成功获得了超过 98% 的铂和玻璃渣的高回收率、熔炼温度和保持时间分别为 15 wt%、0.4、0.6、1500 °C 和 120 或 60 分钟。中试规模的结果表明，玻璃渣和合金中的铂含量分别小于 4 g/t 和大于 0.6 wt%。所以，