Li Rundong, Chi Yong, Li Shuiqing, Wang Lei, Yan Jianhua, Cen Kefa
National Key Lab of MOE Clean Energy and Environment Engineering, Zhejiang University, Hangzhou 310027, China.
Huan Jing Ke Xue. 2002 Jul;23(4):113-7.
Melting characteristics of two kinds of municipal solid waste incineration(MSWI) fly ash were studied in this paper by high temperature differential scanning calorimetry and differential temperature analysis. MSWI fly ash was considered as hazardous waste because it contains heavy metals and dioxins. The experiments were performed in either N2 or O2 atmosphere in temperature range of 20 degrees C-1450 degrees C at various heating rates. Two different MSW incineration fly ashes used in the experiments were collected from our country and France respectively. The process of fly ash melting exhibits two reactions occurring at temperature ranges of about 480 degrees C-670 degrees C and 1136 degrees C-1231 degrees C, respectively. The latent heat of polymorphic transformation and fusion were approximately 20 kJ/kg and 700 kJ/kg, while the total heat required for melting process was about 1800 kJ/kg. The paper also studied effect of CaO to melting. A heat flux thermodynamic model for fly ash melting was put forward and it agrees well with experimental data.
本文采用高温差示扫描量热法和差温分析法研究了两种城市生活垃圾焚烧（MSWI）飞灰的熔融特性。MSWI飞灰由于含有重金属和二噁英而被视为危险废物。实验在N2或O2气氛中进行，温度范围为20℃至1450℃，加热速率各不相同。实验中使用的两种不同的城市生活垃圾焚烧飞灰分别取自我国和法国。飞灰的熔融过程呈现出两个分别发生在约480℃至670℃和1136℃至1231℃温度范围内的反应。多晶转变和熔融的潜热分别约为20kJ/kg和700kJ/kg，而熔融过程所需的总热量约为1800kJ/kg。本文还研究了CaO对熔融的影响。提出了飞灰熔融的热流热力学模型，该模型与实验数据吻合良好。
