| 垃圾焚烧飞灰烧结过程重金属迁移特性研究 |
| 摘要点击 1873 全文点击 2197 投稿时间：2004-10-14 修订日期：2004-12-03 |
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| 中文关键词 垃圾 飞灰 烧结 重金属 迁移 |
| 英文关键词 MSW fly ash sinter heavy metal migration |
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| 中文摘要 |
| 对垃圾焚烧飞灰烧结处理过程6种重金属(Cd、Pb、Cu、Ni、Cr和Zn)迁移特性开展系统实验研究,烧结实验在高温箱式电炉上进行,着重考察烧结温度、时间、制样压力等条件对重金属残留率的影响.结果表明:Cr残留率随温度升高而显著提高,Cu、Zn残留率随温度升高有所波动;烧结时间对Cu残留率影响显著,对其它5种金属影响不明显;在一定范围内,6种重金属残留率随制样压力增大而提高;Cd、Pb易于挥发,而Cu、Ni、Cr和Zn不易挥发;烧结温度、时间、制样压力对各种重金属残留率的影响程度各不相同;烧结处理可以固化大部分重金属,同时飞灰中重金属在烧结过程中的残留率因种类不同而呈现显著差异. |
| 英文摘要 |
| The sintering process is used to stabilize the heavy metal in fly ash from municipal solid waste incinerator(MSWI).Migration characteristics of 6 targeted heavy metals(Cd,Pb,Cu,Ni,Cr and Zn) in the sintering process of MSWI fly ash were investigated by experiments.Effect of several factors including sintering temperature,residence time,molding pressure and particle diameter on the migration of heavy metals were discussed in details.The results show that cadmium and lead are volatile metals,while nickel,copper,chromium and zinc belong to involatilizable metals.The effects of sintering temperature,residence time,molding pressure and particle diameter on the stabilizing efficiency differ from each other.The study shows that most of heavy metals are stabilized during the sintering process.The stabilizing efficiency of heavy metals was different for different elements. |
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