【摘要】 铁矾渣作为湿法炼锌工艺生产过程中产生的副产品之一，重金属含量高且稳定性差，已被认定为危险废弃物.本文中使用热重差热分析仪对国内某湿法炼锌厂产出的铁矾渣的热分解过程进行研究，确定了其主要分解步骤及动力学参数，并考察了铁矾渣作为水泥配料时对水泥熟料生成的影响.结果表明：在260～430℃范围内，TG-DSC线有1个吸热峰，铁矾渣伴有15%的质量损失，该反应为铁矾的脱羟基过程（活化能E=185.06 kJ/mol、指前因子A=42 639 424 088）;在500～700℃范围内，TG-DSC线有1个吸热峰，铁矾渣伴有22%的质量损失，这主要由硫酸盐分解所致（E=184.21 kJ/mol,A=7 959 984.333）;通过计算得出铁矾渣热分解的动力学模型函数为G（a）=[（1/1-a）^1/3-1]^m.此外，当用铁矾渣替代氧化铁作为水泥熟料的配料时，随着铁矾渣添加量的增加，生成的硅酸盐含量下降，杂质含量增多.更多还原

【Abstract】 As one of the by-products produced during the zinc hydrometallurgical process, jarosite residue has been identified as a hazardous waste due to its high heavy metal content and poor stability. In this paper, the thermal decomposition process of jarosite residue produced from the zinc hydrometallurgical process in Inner Mongolia was investigated by using a thermogravimetric differential thermal analyzer to determine its main decomposition steps and its kinetic parameters, and finally to investigate the effect of jarosite residue on cement clinker production when it is used as cement ingredient. The results showed that there was a heat absorption peak with 15% mass loss in the TG-DSC line from 260 to 430 ℃, and the reaction was the process of jarosite dehydroxylation（activation energy E=185.06 kJ/mol, finger front factor A=42 639 424 088）. There was a heat absorption peak with 22% mass loss from 500 to 700 ℃ and the reaction is a sulfate decomposition process（E=184.21 kJ/mol, A=7 959 984.333）. The kinetic model function for the thermal decomposition of jarosite residue is calculated as G（a）=[（1/1-a）^1/3-1]^m. In addition, when jarosite residue is used as an ingredient of cement instead of iron oxide, the silicate content generated decreases and the impurity content increases with the increase of jarosite residue incorporation.更多还原