ABSTRACT

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, Na₂B₂O₄•10H₂O addition, CaO/SiO₂ 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.

摘要

研究了一种用废汽车催化剂（SAC）和废流化催化裂化催化剂（SFCC）混合冶炼回收铂并制备玻璃渣的新方法。与其他单一危废固废金属收集工艺相比，该方法减少了助熔剂的添加量，同时增加了危固废的处理种类。最佳SFCC添加量、铁捕收剂添加量、Na ₂ B ₂ O ₄ •10H ₂ O添加量、CaO/SiO ₂铂回收的质量比、温度和保持时间分别为 20、11、16 wt%、0.6、1550–1600°C 和 60 分钟。在这个提议的联合工艺中，超过 98% 的铂从 SAC 中得到有效回收。同时，玻璃渣中铂的浓度低于7克/吨。由于重金属离子的浸出率低，熔渣中重金属的浸出特性证实了所获得的玻璃渣是无害的熔渣。本文提出了一种通过联合冶炼工艺从 SAC 中回收铂的有效且环保的方法。