Raman and XRD study of polyhalite ore during calcinations

Huaide Cheng,Jun Li,Qingyu Hai,Jianguo Song,Xuehai Ma

Vibrational Spectroscopy（2019）

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摘要

•Polyhalite ore started to decompose into anhydrite and langbeinite at 573 K.•The changes of internal models of vibration of SO4 indicated a phase transformation.•The most probable mechanism function matched D3 Janders diffusion mechanism.•Calcination and hot-leaching could improve the extraction of potassium.

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关键词

Phase transformation,Polyhalite ore,Calcinations,Raman,X ray,Kinetics

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