Department of Material Science and Engineering, Chongqing University, Chongqing, China.
Environ Technol. 2009 Dec 14;30(14):1503-9. doi: 10.1080/09593330903241938.
Fly ash generated from municipal solid waste (MSW) incineration is frequently classified as hazardous material and requires special disposal. The management of the large amount of fly ash has caused increasing problems in China. This work describes a novel approach for melting MSW incineration fly ash, and the distribution of heavy metals was characterized during the iron bath-melting separation process. Four hundred grams of pelletized fly ash was fed into the furnace in molten iron bath atmosphere. After the melting separation process, the distribution of heavy metals in samples and the leaching characteristics of the slag were investigated. The results indicated that iron bath-melting promoted the transfer of Cr, Mn and Cu from the slag phase to the iron phase, which also improved Zn and Pb volatilization. The leaching concentrations, determined by the Chinese Standard Method (rollover leaching procedure) of the target metals of the slag from leaching tests were lower than the Chinese regulatory thresholds. Therefore, this method was proposed as an environmentally friendly technology to achieve a satisfactory solution for MSW incineration fly ash management.
城市生活垃圾焚烧飞灰通常被归类为危险废物，需要特殊处理。大量飞灰的处理在中国造成了越来越多的问题。本工作描述了一种熔化城市生活垃圾焚烧飞灰的新方法，并在铁浴熔化分离过程中对重金属的分布进行了表征。将 400 克球团飞灰投入到铁浴气氛的炉中。在熔化分离过程之后，研究了样品中重金属的分布以及炉渣的浸出特性。结果表明，铁浴熔化促进了 Cr、Mn 和 Cu 从渣相向铁相的转移，也提高了 Zn 和 Pb 的挥发。浸出试验中浸出渣中目标金属的中国标准方法（翻滚浸出程序）确定的浸出浓度低于中国监管阈值。因此，该方法被提议为一种环保技术，以实现对城市生活垃圾焚烧飞灰管理的令人满意的解决方案。
