Scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) were used to analyze the surface micromorphology and components of the iron oxide sulfide powders respectively. Differential scanning calorimetry (DSC) and thermogravimetry (TG) were used to investigate the self-heating properties. It was observed that temperature had a significant effect on the microscopic morphology and composition of the sulfide products. The product powders were homogeneously distributed in small particles and the composition of the products were converted from non-stationary FeS to FeS₂ with the sulfidation temperature increased. The apparent activation energy at a sulfidation temperature of 300 °C was 66.5 % of that at a sulfidation temperature of 150 °C. The apparent activation energies were 114.65 kJ/mol, 95.41 kJ/mol, 89.5 kJ/mol and 76.27 kJ/mol respectively at 150 °C, 200 °C, 250 °C and 300 °C during the self-heating reaction phase. There was only one main weight loss phase for the 100 °C, 150 °C and 200 °C products, while the 250 °C and 300 °C products had an additional weight loss phase before the main weight loss phase. The apparent activation energies of the main weight loss phase of the five temperature products were 318.1–333.7 kJ/mol, 266.2–293.2 kJ/mol, 212.7–234.0 kJ/mol, 174.7–193.1 kJ/mol and 168.7–188.7 kJ/mol, respectively. The apparent activation energies of the first weight loss phase of the 250 °C and 300 °C products were 217.4–243.2 kJ/mol and 198.2–214.6 kJ/mol respectively. The mechanism function for the thermal oxidation of elemental sulfur in the first weight loss phase was determined to follow the spherical contraction phase boundary reaction model, i.e. g(α)= [1-(1-α)^1/3]^m. In the main weight loss phase, the mechanism function for the thermal oxidation of iron sulfate followed the random nucleation followed by subsequent growth model, i.e. g(α)= [ln(1-α)]^m.

采用扫描电子显微镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)分别分析了氧化铁硫化物粉末的表面微观形貌和成分。差示扫描量热法（DSC）和热重法（TG）用于研究自热性能。观察到温度对硫化产物的微观形貌和组成有显着影响。产品粉末以小颗粒均匀分布，随着硫化温度的升高，产品的成分由非平稳的FeS转变为FeS _{2 。}这硫化温度300℃时的表观活化能是硫化温度150℃时的66.5%。自热反应阶段在150 ℃、200 ℃、250 ℃和300 ℃下的表观活化能分别为114.65 kJ/mol、95.41 kJ/mol、89.5 kJ/mol和76.27 kJ/mol。100℃、150℃和200℃产品只有一个主减重阶段，而250℃和300℃产品在主减重阶段之前有一个额外的减重阶段。五种温度产物主失重相的表观活化能分别为318.1~333.7 kJ/mol、266.2~293.2 kJ/mol、212.7~234.0 kJ/mol、174.7~193.1 kJ/mol和168.7~188.7 kJ/mol ， 分别。250 °C 和 300 °C 产品的第一失重阶段的表观活化能分别为 217.4–243.2 kJ/mol 和 198.2–214。分别为 6 kJ/mol。机制函数为在第一失重阶段元素硫的热氧化被确定遵循球形收缩相界反应模型，即g(α)= [1-(1-α) ^1/3 ] ^m 。在主要失重阶段，硫酸铁热氧化的机理函数遵循随机成核和随后的生长模型，即g(α)= [ln(1-α)] ^m。