Abstract

The model composition of municipal solid waste (MSW) and its ash chemical composition are characterized. Mineral compounds and melting points are studied using a variety of analytical methods, including XRD, FTIR, and AFT. The main parameters of slag formation are calculated: base-to-acid ratio, slag viscosity index, and fouling coefficient. Solid municipal waste ash contains significant amounts of CaO, SiO₂ and Al₂O₃. Using the Terra program, thermodynamic calculations of the chemical equilibria of the CaO–SiO₂–Al₂O₃–Na₂O systems containing from 5 to 25% sodium oxide are performed. It is experimentally shown that each 5 wt % increase in the Na₂O content reduces the characteristic melting temperatures of MSW ash by 30–50°С.

中文翻译：

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氧化钠对城市固体垃圾灰熔融的影响

摘要

表征了城市生活垃圾的模型组成及其灰分化学组成。使用多种分析方法（包括XRD，FTIR和AFT）研究矿物化合物和熔点。计算出炉渣形成的主要参数：碱酸比，炉渣粘度指数和结垢系数。固体城市垃圾灰分包含大量的CaO，SiO ₂和Al ₂ O ₃。使用Terra程序，对包含5至25％氧化钠的CaO-SiO ₂ -Al ₂ O ₃ -Na ₂ O系统的化学平衡进行热力学计算。实验表明，Na的每增加5 wt％₂ O含量可使MSW灰的特征熔融温度降低30–50°С。