September 2019
Volume 71    Issue 9

Isothermal reduction kinetics and mechanism of pre-oxidized ilmenite

Zhang, Yingyi; Zhao, Jie; Ma, Xiaolong; Li, Mingyang; Lv, Yan; Gao, Xudong

ABSTRACT:

Full-text paper:
Mining, Metallurgy & Exploration (2019) 36:825–837, https://doi.org/10.1007/s42461-019-0075-5

This study aims to investigate the reduction thermodynamics of ilmenite and pre-oxidized ilmenite, and reveals the isothermal reduction kinetics of pre-oxidized ilmenite concentrate by carbon monoxide. The results indicate that the ilmenite concentrate and pre-oxidized ilmenite concentrate can be selectively reduced by controlling the temperature. The pre-oxidation process leads to the breakage of complex mineral structure, and the formation of porous simple oxides, which is an effective method to increase the reduction and leaching rate. 

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