The sintering process provides an effective alternative for the treatment and resource recycling of Municipal Solid Waste (MSW) incinerator ashes. However, the driving force required to reach the sintered state at the ash powder contact point is proportional to the surface area of the ash powder, and is thus affected by the particle size of the MSW incinerator ashes. This study focus on the effects of the particle size on the characteristics of ash sintering. The experiments were conducted at sintering temperatures ranging from 400-1000°C with sintering time varying from 1 to 4 hours, respectively. The results indicate that the compressive strength of compacted sintered monoliths decreases with increasing particle size. The strength is also affected by the sintering temperature. For specimens sintered at 400-1000°C, for not less than 0.5 hr, the compressive strength peaked at 800°C, developing a strength of greater than 58.8 MPa. Compacted specimens sintered at higher temperatures, ranging from 800-1000°C, showed a much higher total Cr concentration than in the untreated specimens, suggesting that Cr compounds were converted into more soluble or more extractable forms after sintering. However, for any specimen with a different particle size, sintered at 400-1000°C, the heavy metal concentration in the TCLP leachate was in compliance with the current EPA's regulatory threshold.
|Number of pages||15|
|State||Published - 1998|
|Event||Proceedings of the 1998 91st Annual Meeting & Exposition of the Air & Waste Management Association - San Diego, CA, USA|
Duration: 14 Jun 1998 → 18 Jun 1998
|Conference||Proceedings of the 1998 91st Annual Meeting & Exposition of the Air & Waste Management Association|
|City||San Diego, CA, USA|
|Period||14/06/98 → 18/06/98|