Raman and XRD study of polyhalite ore during calcinations

doi:10.1016/j.vibspec.2019.04.007

ISL OpenIR > 盐湖地质与环境实验室

	Raman and XRD study of polyhalite ore during calcinations
	Cheng, Huaide; Li, Jun; Hai, Qingyu; Song, Jianguo; Ma, Xuehai
	2019-05
发表期刊	VIBRATIONAL SPECTROSCOPY
ISSN	0924-2031
卷号	102 页码:63-70
摘要	In this paper, the thermal decomposition of polyhalite ore from Dayantan Playa in Qaidam Basin of China was investigated by X-ray powder diffractometry (XRD), Raman spectroscopy (Raman), and thermal analysis techniques (TG-DTG). The dehydration reaction of polyhalite ore takes place with the release of water and starts at about 510 K. The results of X-ray diffraction of roasting sample showed that polyhalite ore starts to decompose into anhydrite and langbeinite at 573 K. Raman spectroscopy, in conjunction with X-ray diffraction, was also used to follow the thermal decomposition of polyhalite ore. The changes of internal models of vibration of the SO4 ions in sulfates indicated the phase transformation polyhalite, langbeinite, and anhydrite. The reaction kinetics of thermal decomposition of polyhalite ore were successfully modeled by a Coats-Redfern equation O and the activation energy is found to be 208 kJ.mol(-1). Additionally, the effect of roasting temperature on potassium extraction from polyhalite ore was studied.
DOI	10.1016/j.vibspec.2019.04.007
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/34020
专题	盐湖地质与环境实验室中国科学院青海盐湖研究所
推荐引用方式 GB/T 7714	Cheng, Huaide,Li, Jun,Hai, Qingyu,et al. Raman and XRD study of polyhalite ore during calcinations[J]. VIBRATIONAL SPECTROSCOPY,2019,102:63-70.
APA	Cheng, Huaide,Li, Jun,Hai, Qingyu,Song, Jianguo,&Ma, Xuehai.(2019).Raman and XRD study of polyhalite ore during calcinations.VIBRATIONAL SPECTROSCOPY,102,63-70.
MLA	Cheng, Huaide,et al."Raman and XRD study of polyhalite ore during calcinations".VIBRATIONAL SPECTROSCOPY 102(2019):63-70.

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