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选取从江苏省谏壁电厂收集的粉煤灰,用磁铁吸出其中大部分含铁化合物,并在750℃和950℃加热半小时,分别用穆斯堡尔谱仪测定其中铁化物的状态。同时用X-射线分析其物相,电子显微镜观察其形貌。 实验结果表明,穆斯堡尔谱仪可以测出X-射线所不能分辨开的铁化物、固溶体和玻璃相。鉴定出粉煤灰中的含铁化合物主要有以下几种:Fe_3O_4(大量)、α-Fe_2O_3、γ-Fe_2O_3,此外还有少量氧化铁微晶和超顺磁固溶
The fly ash collected from Jianbi Power Plant in Jiangsu Province was selected. Most of the ferrous compounds were extracted by magnet and heated at 750 ℃ and 950 ℃ for half an hour. The state of the ferrite was determined by Mossbauer spectroscopy. At the same time by X-ray analysis of its phase, the electron microscope to observe the morphology. The experimental results show that the Mossbauer spectrometer can detect the ferrite, solid solution and glass phase which X-ray can not distinguish. Identification of iron compounds in the fly ash are mainly the following: Fe 3 O 4 (a large number), α-Fe 2 O 3, γ-Fe 2 O 3, in addition to a small amount of iron oxide crystallites and superparamagnetic solid solution