NDLI: Isothermal reduction kinetics of Panzhihua ilmenite concentrate under 30vol% CO–70vol% N$

Content Provider	Springer Nature Link
Author	Zhang, Ying yi Lü, Wei Lü, Xue wei Li, Sheng ping Bai, Chen guang Song, Bing Han, Ke xi
Copyright Year	2017
Abstract	The reduction of ilmenite concentrate in 30vol% CO–70vol% N$_{2}$ atmosphere was characterized by thermogravimetric and differential thermogravimetric (TG–DTG) analysis methods at temperatures from 1073 to 1223 K. The isothermal reduction results show that the reduction process comprised two stages; the corresponding apparent activation energy was obtained by the iso-conversional and model-fitting methods. For the first stage, the effect of temperature on the conversion degree was not obvious, the phase boundary chemical reaction was the controlling step, with an apparent activation energy of 15.55–40.71 kJ·mol$^{–1}$. For the second stage, when the temperatures was greater than 1123 K, the reaction rate and the conversion degree increased sharply with increasing temperature, and random nucleation and subsequent growth were the controlling steps, with an apparent activation energy ranging from 182.33 to 195.95 kJ·mol$^{–1}$. For the whole reduction process, the average activation energy and pre-exponential factor were 98.94–118.33 kJ·mol$^{–1}$ and 1.820–1.816 min$^{–1}$, respectively.
Starting Page	240
Ending Page	248
Page Count	9
File Format	PDF
ISSN	16744799
Journal	International Journal of Minerals, Metallurgy, and Materials
Volume Number	24
Issue Number	3
e-ISSN	1869103X
Language	English
Publisher	University of Science and Technology Beijing
Publisher Date	2017-03-09
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	ilmenite isothermal reduction kinetics carbon monoxide Materials Science Metallic Materials Characterization and Evaluation of Materials Ceramics, Glass, Composites, Natural Materials Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Geochemistry and Petrology Mechanical Engineering

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