Thermal behaviour of Moroccan phosphogypsum

被引：63

作者：

Sebbahi, S

Chameikh, MLO

Sahban, F

Aride, J

Benarafa, L

Belkbir, L

机构：

[1] ENS TAKADDOUM,LAF 502,AUPELF UREF,LAB PHYSICOCHIM MAT,RABAT,MOROCCO

[2] FAC SCI RABAT,DEPT CHIM,LAB SPECT INFRAROUGE,RABAT,MOROCCO

[3] FAC SCI RABAT,DEPT CHIM,LAB REACTIV SYST SOLIDE GAS,RABAT,MOROCCO

来源：

THERMOCHIMICA ACTA | 1997年 / 302卷 / 1-2期

关键词：

anhydrite; DTA; gypsum; phosphogypsum; TGA; thermal decomposition;

D O I：

10.1016/S0040-6031(97)00159-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this article, we have examined the thermal behaviour of Moroccan phosphogypsum in the absence of additives. We have used very diversified techniques: thermogravimetric analysis (TGA), differential thermal analysis (DTA), infrared spectroscopy and X-ray diffraction. DTA has allowed us to point out several transformations, Moreover, TGA has shown that the dehydration can occur in one step, which confirms that the sample is not bihydrated. The infrared spectroscopy has allowed us to characterize the water molecules of crystallization and the sulphate grouping of phosphogypsum. (C) 1997 Elsevier Science B.V.

引用

页码：69 / 75

页数：7