Citation: ZHONG Shan, FENG Jing-kun, CHEN Yang, KUANG Wei, PAN Jing, XIAN Si-yu, LIU Yuan-yuan. Thermal stabilization condition and mechanism of heavy metals in fly ash of solid waste incineration[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(12): 1532-1538. shu

Thermal stabilization condition and mechanism of heavy metals in fly ash of solid waste incineration

ZHONG Shan ^1,, ,
FENG Jing-kun ¹ ,
CHEN Yang ¹ ,
KUANG Wei ^1,2 ,
PAN Jing ^1,2 ,
XIAN Si-yu ¹ ,
LIU Yuan-yuan ³

1.
1. College of Environment and Resources, Guangxi Normal University, Guilin 541004, China;

Corresponding author: ZHONG Shan,
Received Date: 11 April 2013
Available Online: 17 June 2013
Fund Project:

The volatility and the stabilization of heavy metals in fly ash in municipality & agriculture mixed waste incineration(Type A) and municipal solid waste incineration(Type B) were investigated. And the heavy metals stabilization mechanism was studied by using FT-IR and XRD. The results indicate that the volatility of heavy metals is higher in type B than that in type A, and is significantly affected by the content of chloride in waste source. The volatility of heavy metals in fly ash varies in a sequence of Mn, Cr < Zn, Cu < Pb, Cd. More than 50% of Pb and Cd are volatilized when the temperature exceeds 1 000 ℃. The relatively optimal thermal treatment temperature is 800 ℃and the heavy metals stabilization is higher and the evaporation rate is lower. The primary mechanism of heavy metals stabilization is the formation of stable silicate structure system above 800 ℃.
- solid waste incineration,
- thermal treatment,
- stabilization,
- evaporation
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