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Related Experiment Videos

[MSW incineration fly ash melting by DSC-DTA].

Rundong Li1, Yong Chi, Shuiqing Li

  • 1National Key Lab of MOE Clean Energy and Environment Engineering, Zhejiang University, Hangzhou 310027, China.

Huan Jing Ke Xue= Huanjing Kexue
|October 10, 2002
PubMed
Summary

This study investigated municipal solid waste incineration (MSWI) fly ash melting behaviors using thermal analysis. Key findings reveal distinct melting reactions and heat requirements, crucial for hazardous waste management.

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Area of Science:

  • Materials Science
  • Environmental Engineering
  • Thermodynamics

Context:

  • Municipal solid waste incineration (MSWI) fly ash is a hazardous waste due to heavy metals and dioxins.
  • Understanding fly ash melting characteristics is vital for safe disposal and potential resource recovery.
  • Previous research has not fully elucidated the complex thermal behavior of MSWI fly ash.

Purpose:

  • To investigate the melting characteristics of two distinct MSWI fly ashes.
  • To determine the thermal reactions, latent heat, and total heat required for fly ash melting.
  • To develop and validate a heat flux thermodynamic model for fly ash melting.

Summary:

  • High-temperature differential scanning calorimetry and differential temperature analysis were employed on MSWI fly ash from two sources under N2 or O2 atmospheres.

Related Experiment Videos

  • Two primary melting reactions were identified: one around 480–670°C and another at 1136–1231°C, with specific latent heats for transformation and fusion.
  • A heat flux thermodynamic model was developed, showing good agreement with experimental data, and the effect of CaO on melting was also studied.

    • Impact:

    • Provides critical data on MSWI fly ash melting points and energy requirements, informing waste treatment processes.
    • The validated thermodynamic model can aid in predicting and optimizing high-temperature processes involving fly ash.
    • Contributes to safer management of hazardous MSWI fly ash and potential valorization strategies.