Raman and XRD study of polyhalite ore during calcinations

doi:10.1016/j.vibspec.2019.04.007

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 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
刊名	VIBRATIONAL SPECTROSCOPY
	2019-05
卷号	102 页码:63-70
ISSN号	0924-2031
DOI	10.1016/j.vibspec.2019.04.007
英文摘要	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.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34020]
专题	青海盐湖研究所_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.