烘烤
机制(生物学)
动力学
煤矸石
冶金
煤
化学
废物管理
材料科学
环境科学
工程类
哲学
物理
有机化学
认识论
量子力学
作者
Yuhan Zhang,Xuesong Zhao,Baoyue Shang,Xuesong Wang,Xiulin Wu,Shuang Chi,Tingting Li
出处
期刊:Metallurgical Research & Technology
[EDP Sciences]
日期:2024-01-01
卷期号:121 (2): 216-216
被引量:3
标识
DOI:10.1051/metal/2024013
摘要
Utilizing the abundant kaolin resources within coal gangue is economically beneficial, although the iron-containing phase in the minerals hampers the value of its utilization. In the present study, CaCl 2 served as the chlorination agent for iron removal from coal gangue through chlorination roasting. The study revealed that when the roasting temperature is below 800 °C, CaCl 2 decomposes into HCl and reacts with the iron content to form chloride, which then volatilizes. Comparatively, when the roasting temperature exceeds 800 °C, CaCl 2 will decompose to produce HCl and Cl 2 to accelerate the volatilization of iron. Through non-isothermal kinetic analysis, the apparent activation energy for iron removal by chlorination roasting of coal gangue was found to be 82.42 KJ/mol, and the pre-exponential factor was 6329.3 s −1 . Correspondingly, isothermal kinetic analysis revealed the apparent activation energy of 84.2 KJ/mol and a pre-exponential factor of 6310.7 s −1 . The optimal reaction kinetic mechanism function for iron removal through chlorination roasting of coal gangue was identified as the F 3 chemical reaction order model via above kinetic analysis. The integral took the form g(α) = (1-α)) 2 –1.
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