铁矿和氧化铁皮的热力学特性

摘要

Thermodynamic characteristics of iron ore and iron oxide were studied by TGA-DSC synchronous thermal analysis.The TGA and DSC curves of iron ore and iron oxide in oxygen atmosphere and nitrogen atmosphere at different rates of temperature elevation were compared with STARe software.It was found that the characteristic curves of iron ore and iron oxide obtained in oxygen atmosphere under the rate of temperature elevation of 20 K · min-1 were more favourable.Stress was put on the analysis of differences between the curves of iron ore and iron oxide obtained by TGA and DSC,and a new method for discrimination of iron ore and iron oxide was provided.%采用热重分析-差示扫描量热法(TGA-DSC)同步热分析技术对铁矿和氧化铁皮的热力学特性进行了研究.利用STARe软件方法分别比较了铁矿和氧化铁皮在氧气气氛和氮气气氛中不同升温速率条件下的TGA和DSC曲线.结果表明:在氧气气氛中,20 K·min-1的升温速率下得到较为理想的铁矿和氧化铁皮特征曲线.还重点分析了铁矿和氧化铁皮的TGA及DSC曲线的差异,为两者的鉴别提供了一种新的方法.