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目的建立了全面分析鉴别自然铜生、煅品的方法。方法利用远红外光谱分析、X射线衍射、热重-差热分析对自然铜生、煅品的结构组成、主要化学成分和热稳定性进行定性半定量分析。结果远红外图谱分析显示:煅品有Fe2O3生成。X射线衍射分析表明:生品主要物相为FeS2,煅品出现了Fe7S8、FeO(OH)、Fe2O3、Fe3O4等复杂物相。热分析显示:自然铜在400～1 000℃时,FeS2逐渐分解;煅品成分结构变化较少。结论以上分析方法鉴别自然铜生、煅品是可行的。
Objective To establish a comprehensive analysis of the identification of natural copper raw calcifications. Methods The structure, chemical composition and thermal stability of natural copper and calcareous products were qualitatively and semi-quantitatively analyzed by far-infrared spectroscopy, X-ray diffraction and TG-DTA. Results Far-infrared spectrum analysis showed that calcined product had Fe2O3 formation. X-ray diffraction analysis shows that the main phase of the raw product is FeS2, and the complex phase of Fe7S8, FeO (OH), Fe2O3 and Fe3O4 appears in the calcined product. Thermal analysis shows that FeS2 decomposes gradually when natural copper is between 400 and 1000 ℃, and its composition changes little. Conclusion The above analysis method to identify natural copper raw calcifications is feasible.