Vitrification of fly ash from municipal solid waste incinerator.
Vitrification of fly ash from municipal solid waste incinerator.
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DOI：
10.1016/s0304-3894(01)00362-4
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发表时间：
2002-04
影响因子：
13.6
通讯作者：
Young Jun Park;J. Heo
中科院分区：
文献类型：
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作者：
Young Jun Park;J. Heo
韩国城市固体废物（MSW）焚烧产生的飞灰含有大量有毒物质，需要进行相应的处理。然而，由于韩国的飞灰具有高氯浓度，因此难以应用胶结和化学处理技术。本研究中，我们沿着报导了粉煤灰的玻璃化过程、玻璃的性质和重金属离子的浸出特性。粉煤灰在1500°C下熔融30 min，加入> 5 wt.% SiO2。玻璃的维氏硬度为4000- 5000 MPa，抗弯强度为60- 90 MPa，压痕断裂韧性为0.9MPam1/2。玻璃对重金属离子Cd ~（2+）<0.04ppm、Cr ~（3+）<0.02ppm、Cu ~（2+）<0.04ppm、Pb ~（2+）<0.2ppm的浸出也有很好的抵抗能力。这些结果表明，玻璃化技术是一种有效的有毒焚烧飞灰的稳定化和资源化。
Fly ash from municipal solid wastes (MSW) incinerators in Korea contains a large amount of toxic materials and requires pertinent treatments. However, since fly ash in Korea has a high chlorine concentration, it is difficult to apply cementation and chemical treatment techniques. In this study, we report the vitrification of fly ash along with the properties of the glasses and leaching characteristics of heavy metal ions. Fly ash can be vitrified by melting at 1500°C for 30min with the addition of >5wt.% of SiO2. Glasses showed Vickers hardness of 4000–5000MPa, bending strength of 60–90MPa and indentation fracture toughness of ∼ 0.9MPam1/2. Glasses also showed the excellent resistance against leaching of heavy metal ions with Cd2+<0.04ppm, Cr3+<0.02ppm, Cu2+<0.04ppm and Pb2+<0.2ppm. These results indicate that the vitrification technique is effective for the stabilization and recycling of toxic incinerator fly ash.