School of Metallurgy, Northeastern University, Shenyang, People's Republic of China.
Environ Technol. 2023 Jan;44(2):139-149. doi: 10.1080/09593330.2021.1965662. Epub 2021 Aug 17.
A novel method of smelting of mixture of spent automotive catalyst (SAC) and spent fluid catalytic cracking catalyst (SFCC) to recover platinum and prepare glass slag was investigated. Compared to other metals collection processes for single hazardous waste solid, this method reduced the amount of fluxing materials addition and increased the processing types of hazardous solid waste simultaneously. The optimum SFCC addition, iron collector addition, NaBO•10HO addition, CaO/SiO mass ratio, temperature, and holding time for platinum recovery were 20, 11, 16 wt%, 0.6, 1550-1600°C, and 60 min, respectively. In this proposed combined process, more than 98% of platinum is efficiently recovered from SAC. Meanwhile, the concentration of platinum in glass slag was less than 7 g/t. The leaching characteristics of heavy metals in slag confirmed the obtained glass slag is a non-hazardous slag due to the low leaching rate of heavy metal ions. This article proposed an effective and environmentally friendly method for the recovery of platinum from SAC via a combined smelting process.
研究了一种从废汽车催化剂（SAC）和废流化催化裂化催化剂（SFCC）混合物中回收铂并制备玻璃渣的新的熔炼方法。与其他收集单一危险废物固体的金属收集工艺相比，该方法减少了助熔剂的添加量，同时增加了危险固体废物的处理类型。铂回收的最佳 SFCC 添加量、铁捕集剂添加量、NaBO·10HO 添加量、CaO/SiO 质量比、温度和保温时间分别为 20、11、16wt%、0.6、1550-1600°C 和 60min。在该联合工艺中，SAC 中的铂回收率超过 98%。同时，玻璃渣中铂的浓度低于 7g/t。渣中重金属的浸出特性证实，由于重金属离子的浸出率低，所得玻璃渣是一种非危险渣。本文提出了一种通过联合熔炼工艺从 SAC 中回收铂的有效且环保的方法。
